UiPath

UiPath

Top Interview Questions

About UiPath

 

UiPath Overview

UiPath is one of the leading Robotic Process Automation (RPA) platforms in the world, designed to automate repetitive, rule-based tasks across various applications. RPA technology allows businesses to configure software “robots” or “bots” to emulate human actions interacting with digital systems. UiPath stands out due to its user-friendly interface, strong community support, and wide adoption across industries like banking, healthcare, insurance, and manufacturing.


History of UiPath

UiPath was founded in 2005 by Romanian entrepreneurs Daniel Dines and Marius Tirca. Initially, it started as a small outsourcing company focused on automation. Over time, it transitioned into an RPA software vendor, focusing on providing tools that allow enterprises to automate processes without extensive coding knowledge. By 2017, UiPath had grown rapidly, becoming one of the top RPA vendors globally. It went public in April 2021 on the New York Stock Exchange, signaling its massive growth and recognition in the automation industry.


Key Features of UiPath

UiPath is known for its comprehensive set of features that make automation accessible to both technical and non-technical users:

  1. Drag-and-Drop Interface: UiPath Studio offers a visual workflow designer where users can build automation scripts using drag-and-drop activities. This reduces the dependency on complex programming skills.

  2. Recorders: UiPath provides three types of recorders—Basic, Desktop, and Web. These record user actions like clicks, typing, and navigation to create automated workflows quickly.

  3. Pre-Built Activities: It offers hundreds of pre-built activities for common tasks such as Excel manipulation, email automation, PDF data extraction, and database operations.

  4. Orchestrator: UiPath Orchestrator is a web-based platform used to deploy, schedule, monitor, and manage robots. It allows centralized control and provides analytics on robot performance.

  5. Robots: UiPath supports two types of robots—Attended Robots, which assist human workers and run tasks on the same machine, and Unattended Robots, which run autonomously on virtual machines or servers without human intervention.

  6. AI Integration: UiPath integrates AI and Machine Learning capabilities, allowing bots to perform intelligent tasks such as document understanding, image recognition, and natural language processing.

  7. Cross-Platform Automation: UiPath can automate tasks across desktop, web, mainframe, Citrix, and cloud-based applications, making it highly versatile.

  8. Security: UiPath emphasizes security through features like role-based access control, encrypted credentials, and audit trails for compliance.


UiPath Components

UiPath’s ecosystem consists of three primary components:

  1. UiPath Studio:
    UiPath Studio is the development environment where users design workflows. It supports three workflow types:

    • Sequence: Ideal for linear, step-by-step processes.

    • Flowchart: Useful for complex decision-based processes.

    • State Machine: Best for processes with multiple states and transitions.

  2. UiPath Robot:
    Robots execute workflows created in Studio. They can be deployed on multiple machines, handling tasks simultaneously and increasing efficiency. Robots can log their actions, handle exceptions, and work continuously without fatigue.

  3. UiPath Orchestrator:
    Orchestrator acts as a control center for robots. It enables scheduling tasks, monitoring robot performance, logging execution details, and managing queues for high-volume automation.


How UiPath Works

UiPath follows a straightforward yet powerful approach to automation:

  1. Process Identification: Identify repetitive, rule-based tasks suitable for automation.

  2. Workflow Design: Build automation workflows in UiPath Studio using pre-built activities or custom scripts.

  3. Testing: Test the workflow locally to ensure accuracy and efficiency.

  4. Deployment: Deploy the workflow to UiPath Robots via Orchestrator.

  5. Execution: Robots execute tasks according to predefined schedules or trigger events.

  6. Monitoring & Optimization: Orchestrator monitors robot performance, collects logs, and helps optimize workflows for efficiency.


Applications of UiPath

UiPath can automate a wide range of processes in different sectors:

  1. Banking & Finance: Automates account reconciliation, loan processing, customer onboarding, and report generation.

  2. Healthcare: Streamlines patient registration, claims processing, data entry, and appointment scheduling.

  3. Insurance: Handles policy issuance, claims management, premium calculation, and regulatory compliance.

  4. Manufacturing: Manages inventory updates, supply chain monitoring, and quality control data collection.

  5. Customer Service: Automates ticket management, email responses, and customer data updates.

  6. Human Resources: Streamlines employee onboarding, payroll processing, and leave management.


Benefits of UiPath

UiPath offers several advantages for organizations adopting RPA:

  1. Increased Efficiency: Robots can work 24/7 without breaks, completing tasks faster than humans.

  2. Cost Savings: Reduces the need for manual labor and operational costs.

  3. Error Reduction: Automation minimizes human errors in repetitive tasks.

  4. Scalability: Workflows can be scaled easily, with multiple robots handling larger volumes of work.

  5. Employee Satisfaction: Employees are freed from monotonous tasks, allowing them to focus on more strategic work.

  6. Compliance & Auditability: Logs and audit trails ensure regulatory compliance and transparency.


Challenges in UiPath Implementation

Despite its advantages, organizations may face challenges:

  1. Process Complexity: Not all processes are easily automatable; complex workflows may require extensive analysis and testing.

  2. Initial Investment: Licensing and setup costs can be significant, especially for large enterprises.

  3. Change Management: Employees may resist automation fearing job loss, requiring careful change management.

  4. Maintenance: Automated workflows need ongoing maintenance, especially if underlying applications change.


UiPath Community and Ecosystem

UiPath has built a strong community called the UiPath Community, which provides:

  • UiPath Academy: Offers free training courses and certifications for beginners to advanced users.

  • UiPath Marketplace: A repository of reusable automation components, workflows, and templates shared by the community.

  • Forums and Events: Users can connect, share knowledge, and solve problems collaboratively.

The community plays a crucial role in driving the adoption and evolution of UiPath globally.


Future of UiPath

UiPath continues to evolve with innovations in AI, ML, and cloud computing. Its focus is on expanding Intelligent Automation, where bots not only automate repetitive tasks but also make decisions using AI-driven insights. The company is increasingly integrating capabilities like document understanding, chatbots, and predictive analytics to make automation smarter and more autonomous. As industries strive for digital transformation, UiPath is positioned as a key enabler for operational efficiency and business growth.

Fresher Interview Questions

 

1. What is UiPath?

Answer:
UiPath is a Robotic Process Automation (RPA) tool used to automate repetitive tasks in business processes. It provides a platform for designing, deploying, and managing software robots that mimic human actions interacting with digital systems.

Key Features:

  • Drag-and-drop workflow designer

  • Integration with applications like Excel, SAP, and web applications

  • Supports attended and unattended automation

  • Orchestrator for managing and scheduling robots


2. What are the main components of UiPath?

Answer:
UiPath has three main components:

  1. UiPath Studio:

    • A visual designer to create automation workflows.

    • Supports sequences, flowcharts, and state machines.

  2. UiPath Robot:

    • Executes workflows designed in UiPath Studio.

    • Types:

      • Attended Robot: Works alongside humans.

      • Unattended Robot: Works independently without human intervention.

  3. UiPath Orchestrator:

    • A web-based application to manage, monitor, and deploy robots.

    • Handles scheduling, logging, and security.


3. What types of automation does UiPath support?

Answer:
UiPath supports three types of automation:

  1. Attended Automation: Robot works with humans.

  2. Unattended Automation: Robot runs independently.

  3. Hybrid Automation: Combination of both.


4. What are sequences, flowcharts, and state machines in UiPath?

Answer:

  • Sequence: Linear series of steps; ideal for simple tasks.

  • Flowchart: Visual representation of complex workflows with branching logic.

  • State Machine: Executes based on states and transitions; used for event-driven workflows.


5. What are selectors in UiPath?

Answer:
Selectors are XML fragments used by UiPath to identify UI elements. They define the target element in an application and are critical for automation.

Types of selectors:

  • Full selectors: Complete path of the element in the UI tree.

  • Partial selectors: Contains only essential attributes for dynamic environments.


6. What is the difference between UiPath Studio, StudioX, and Studio Pro?

Answer:

  • Studio: For RPA developers; requires coding knowledge.

  • StudioX: For business users; minimal technical knowledge required.

  • Studio Pro: Includes testing features; used for automating test scenarios.


7. What are variables and arguments in UiPath?

Answer:

  • Variables: Store data within a workflow. Can be of types like String, Int32, Boolean, etc.

  • Arguments: Used to pass data between workflows.

    • Direction types:

      • In: Passes data into a workflow

      • Out: Returns data from a workflow

      • In/Out: Bidirectional data transfer


8. What are the different types of recordings in UiPath?

Answer:

  1. Basic Recording: Clicks, types, and simple automation.

  2. Desktop Recording: Automates desktop apps with complex UI interactions.

  3. Web Recording: Automates web applications.

  4. Citrix Recording: Used for virtual environments where direct selectors are unavailable.


9. What is the difference between UiPath and other RPA tools like Automation Anywhere or Blue Prism?

Answer:

Feature UiPath Automation Anywhere Blue Prism
Ease of use High (visual workflow) Moderate Moderate
Community support Large and active Moderate Moderate
Coding requirement Low to Medium Medium High
Licensing Free community edition Paid Paid
Attended & Unattended Both Both Mainly unattended

10. What is UiPath Orchestrator and why is it important?

Answer:
UiPath Orchestrator is a web application that allows you to:

  • Deploy, schedule, and monitor robots.

  • Centralize logs and analytics.

  • Control robot permissions and manage queues for transaction-based processes.

It’s crucial for enterprise-level automation where multiple robots and workflows need centralized control.


11. What are Queues in UiPath Orchestrator?

Answer:
Queues are storage structures in Orchestrator that hold transaction items for robots to process.

Key Points:

  • Supports retry mechanisms and prioritization.

  • Helps in handling large-scale data-driven automation.


12. How do you handle exceptions in UiPath?

Answer:
UiPath provides activities and techniques for exception handling:

  • Try Catch: For handling predictable exceptions.

  • Throw: To manually throw exceptions.

  • Rethrow: To propagate caught exceptions.

  • Finally block: To execute cleanup code.


13. What is the difference between a process and a project in UiPath?

Answer:

  • Project: A folder that contains workflows, dependencies, and configuration files.

  • Process: A published version of a project that can be executed by robots.


14. What are some best practices in UiPath development?

Answer:

  • Use meaningful names for workflows, variables, and arguments.

  • Modularize workflows using reusable components.

  • Handle exceptions gracefully.

  • Optimize selectors for dynamic environments.

  • Use Config files for storing environment-specific data.


15. What is REFramework in UiPath?

Answer:
Robotic Enterprise Framework (REFramework) is a template designed for large-scale, transaction-based automation.

Key Features:

  • Built-in exception handling.

  • Logging and reporting mechanisms.

  • Supports queue-based transaction processing.

  • Modular design with initialization, processing, and closing states.


16. What are activities in UiPath?

Answer:
Activities are pre-defined actions that perform a specific task in workflows. Examples include:

  • Click – Clicks a UI element.

  • Type Into – Types text in an input field.

  • Read Range – Reads data from Excel.

  • Send Outlook Mail – Sends emails using Outlook.


17. How can you interact with Excel in UiPath?

Answer:

  • Excel Application Scope: Opens an Excel file for automation.

  • Activities: Read Range, Write Range, Read Cell, Write Cell, Filter Table, Sort Table.

  • Supports both workbook-level and application-level automation.


18. How do you debug a workflow in UiPath?

Answer:
UiPath provides multiple debugging tools:

  • Breakpoints: Pause execution at specific points.

  • Step Into / Step Over / Step Out: Control execution flow.

  • Locals panel: Inspect variable values.

  • Output panel: Check logs and errors.


19. What is the difference between Data scraping and Screen scraping?

Answer:

  • Data Scraping: Extracts structured data from applications like tables.

  • Screen Scraping: Extracts unstructured data from UI elements using OCR or text-based methods.


20. How do you secure credentials in UiPath?

Answer:

  • Use UiPath Orchestrator Assets for storing credentials.

  • Windows Credential Manager can also be used.

  • Avoid hardcoding sensitive data in workflows.


21. What is the difference between Attended and Unattended Robots?

Answer:

Feature Attended Robot Unattended Robot
Trigger Manually triggered by users Automatically triggered by Orchestrator
Interaction Works alongside humans Works independently
Use Case Customer service, help desk Batch processing, data migration
Deployment Desktop Server

22. What is the difference between a Sequence and a Flowchart?

Answer:

  • Sequence: Linear execution, suitable for simple tasks.

  • Flowchart: Visual branching, suitable for complex processes with multiple decision points.

Scenario: If you have a workflow where you must check multiple conditions (like approving or rejecting invoices), a Flowchart is more suitable.


23. How can you make a UiPath workflow dynamic?

Answer:

  • Use variables and arguments instead of hardcoded values.

  • Use dynamic selectors with attributes like idx, aaname, title.

  • Parameterize file paths, URLs, and credentials.


24. What is the difference between a variable and an argument?

Answer:

  • Variable: Stores temporary data within a workflow.

  • Argument: Passes data between workflows or projects.

Example:

  • Variable: invoiceNumber within a workflow

  • Argument: Passing invoiceNumber from Main.xaml to ProcessInvoice.xaml


25. How do you handle dynamic selectors in UiPath?

Answer:
Dynamic selectors adapt to changing UI elements. Techniques include:

  • Using wildcards * and ? in selectors.

  • Using variables for dynamic attributes.

  • Using Anchor Base activity to locate elements relative to fixed text.

Scenario: If a button ID changes daily, use "<ctrl id='*' />" or a variable to handle it.


26. What is the difference between Full, Partial, and Fuzzy selectors?

Answer:

  • Full Selector: Complete path of an element.

  • Partial Selector: Only essential attributes for dynamic environments.

  • Fuzzy Selector: Matches UI elements even if small changes occur.


27. Explain the types of arguments in UiPath.

Answer:

  1. In: Passes data into the workflow.

  2. Out: Returns data from the workflow.

  3. In/Out: Bidirectional data transfer between workflows.

Scenario: Passing a file path into a workflow and returning the status after processing.


28. What are the different types of recordings in UiPath?

Answer:

  1. Basic: Click, type, simple automation.

  2. Desktop: Desktop apps automation with complex UI.

  3. Web: Automates web applications.

  4. Citrix: Virtual desktop environments where selectors are unavailable.

  5. Screen Scraping: Extracts unstructured data from virtual desktops.


29. What is the difference between Data Scraping and Screen Scraping?

Answer:

Feature Data Scraping Screen Scraping
Data Type Structured (tables, grids) Unstructured
Accuracy High Lower (uses OCR)
Use Case Extracting tables from web pages Capturing text from images

30. How do you debug in UiPath?

Answer:

  • Use Breakpoints to pause workflow.

  • Use Step Into, Step Over, and Step Out for controlled execution.

  • Inspect Locals to see variable values.

  • Check Output panel for logs and exceptions.


31. What is REFramework and when should you use it?

Answer:
REFramework (Robotic Enterprise Framework) is a template for transaction-based automation.

Features:

  • Initialization, processing, and closing states.

  • Built-in exception handling and retry mechanisms.

  • Logging and reporting ready.

  • Ideal for large-scale, repetitive business processes.


32. What are Queues in UiPath Orchestrator?

Answer:

  • Queues store transaction items for robots.

  • Support retry logic, prioritization, and logging.

  • Useful for high-volume, repetitive data processing like invoice processing.


33. What are Activities in UiPath?

Answer:

  • Pre-built actions in workflows.

  • Examples: Click, Type Into, Read Range, Send Outlook Mail.

  • Activities can be container-based (like Excel Application Scope) or atomic (like Click).


34. How do you handle exceptions in UiPath?

Answer:

  • Try Catch: Handle predictable errors.

  • Throw: Raise a custom exception.

  • Rethrow: Pass exception to parent workflow.

  • Finally: Execute cleanup code regardless of error.

Scenario: If an Excel file is missing, catch FileNotFoundException and log the error.


35. How can you interact with Excel in UiPath?

Answer:

  • Excel Application Scope: Open and manipulate Excel files.

  • Read Range/Write Range: Work with sheets and ranges.

  • Read Cell/Write Cell: Access individual cells.

  • Supports workbook automation (without opening Excel) and application automation (with Excel UI).


36. How do you send emails in UiPath?

Answer:

  • Use Send Outlook Mail Message for Outlook.

  • Use Send SMTP Mail Message for other mail servers.

  • Can attach files, set recipients, and configure CC/BCC.


37. What is the difference between Attended and Unattended automation in terms of scheduling?

Answer:

  • Attended: Triggered manually by users, cannot be scheduled.

  • Unattended: Can be scheduled using Orchestrator for unattended execution.


38. What is the difference between UiPath Studio and StudioX?

Answer:

  • Studio: For developers; supports advanced logic and coding.

  • StudioX: For business users; simpler interface with drag-and-drop automation.


39. How do you manage credentials securely in UiPath?

Answer:

  • Use Orchestrator Assets to store sensitive data.

  • Use Windows Credential Manager.

  • Avoid hardcoding passwords or confidential info in workflows.


40. How do you optimize selectors for better performance?

Answer:

  • Use minimal attributes to reduce dependency on UI structure.

  • Avoid volatile attributes like idx unless necessary.

  • Use Anchor Base for relative positioning.

  • Use wildcards and variables for dynamic elements.


41. What is an Anchor Base activity?

Answer:
Anchor Base helps locate an element relative to a fixed UI element.

  • Useful when selectors are dynamic or unstable.

  • Example: Click “Submit” button next to a specific label.


42. What is the difference between Workbook vs Excel automation?

Answer:

  • Workbook activities: Directly read/write Excel files without opening Excel (faster, no UI dependency).

  • Excel activities: Use Excel application interface; supports advanced features like formulas and charts.


43. What is the difference between UI Automation and API Automation in UiPath?

Answer:

  • UI Automation: Simulates human interaction with UI elements.

  • API Automation: Directly interacts with software through API calls (faster, more reliable).


44. What are the different logging levels in UiPath?

Answer:

  • Info: General information.

  • Warn: Warning messages.

  • Error: Errors encountered.

  • Trace: Detailed debug info for developers.


45. What is the difference between a process and a package in UiPath?

Answer:

  • Process: Published version of a project executed by a robot.

  • Package: Contains all dependencies of a project; can be reused in multiple processes.

 

Experienced Interview Questions

 

1. Explain the UiPath architecture in detail.

Answer:
UiPath architecture has three main layers:

  1. UiPath Studio:

    • Design environment for building workflows.

    • Supports sequences, flowcharts, state machines.

    • Integration with Excel, SAP, databases, and APIs.

  2. UiPath Robot:

    • Executes workflows designed in Studio.

    • Types:

      • Attended Robot: Triggered by users, works alongside humans.

      • Unattended Robot: Scheduled or triggered by Orchestrator, works independently.

  3. UiPath Orchestrator:

    • Web-based platform for managing robots.

    • Features: Queue management, scheduling, logs, credential storage, alerts, analytics.

  4. Additional Components:

    • Robot Tray: Allows control of robots from user machines.

    • UiPath Assistant: Interface for running and managing processes on desktops.


2. How do you design an enterprise-grade automation solution?

Answer:
Key considerations:

  • Modular Design: Use reusable workflows for repeated tasks.

  • Exception Handling: Implement Try Catch, Rethrow, and Logging.

  • Logging & Monitoring: Integrate with Orchestrator for real-time monitoring.

  • Queue-Based Processing: For high-volume transactions, use Orchestrator queues.

  • Configuration Management: Maintain environment-specific configurations in Config.xlsx.

  • Security: Use Orchestrator Assets for credentials.

Example:
Automating invoice processing for multiple vendors:

  • Read invoices from emails → Store in folders → Extract data → Process via SAP → Update status → Log results.


3. What is REFramework and why is it used in large-scale automation?

Answer:
Robotic Enterprise Framework (REFramework) is a template designed for transaction-based automation.

Features:

  • Handles exceptions, retries, and logging automatically.

  • Uses a state machine architecture with states: Init, Get Transaction Data, Process Transaction, and End Process.

  • Supports Orchestrator queues.

  • Provides scalability and maintainability for enterprise automation.

Scenario: Processing thousands of invoices across multiple systems, with retry logic for failures.


4. Explain the difference between attended, unattended, and hybrid automation.

Answer:

Type Trigger Use Case
Attended Manual Customer service, helpdesk automation
Unattended Orchestrator/Schedule Batch processing, payroll, data migration
Hybrid Both Combination for conditional user interaction

5. How do you handle dynamic selectors in complex automation?

Answer:

  • Use wildcards: * and ?.

  • Use variables in selectors for changing attributes.

  • Anchor Base activity to locate elements relative to stable UI elements.

  • Use Find Element/Find Image for elements without reliable selectors.

Example: Clicking a “Submit” button that moves in a web page.


6. What are Queues in Orchestrator and how do you use them effectively?

Answer:

  • Queues store transaction items for robots to process.

  • Features: Retry mechanism, priority, SLA, logging.

  • Best Practices:

    • Use queues for high-volume data processing.

    • Track transaction status (New, In Progress, Failed, Successful).

    • Implement retry logic in REFramework for failed transactions.


7. What is the difference between UiPath StudioX, Studio, and Studio Pro?

Answer:

  • Studio: For developers; supports complex logic and custom activities.

  • StudioX: For business users; low-code interface.

  • Studio Pro: Includes test automation capabilities for RPA testing.


8. Explain Orchestrator Assets and their use.

Answer:

  • Assets are reusable variables stored in Orchestrator.

  • Types: Text, Boolean, Credential.

  • Use Case: Storing credentials, URLs, and configuration data centrally.

  • Benefits: Secure, environment-specific, reduces hardcoding.


9. How do you implement exception handling in large workflows?

Answer:

  • Use Try Catch blocks for predictable exceptions.

  • Rethrow to pass exceptions to higher-level workflows.

  • Use Global Exception Handler in REFramework for unattended processes.

  • Log meaningful messages to Orchestrator.

  • Retry failed transactions using Orchestrator queues.

Scenario: Invoice fails due to missing attachment → Retry three times → Move to exception folder → Log error in Orchestrator.


10. What is the difference between Data Scraping and Screen Scraping?

Answer:

Feature Data Scraping Screen Scraping
Data Type Structured (tables, grids) Unstructured (text/images)
Method Uses UI elements OCR or images
Accuracy High Lower (depends on OCR accuracy)
Use Case Extracting tables from SAP/Web Capturing text from virtual apps

11. How do you integrate UiPath with databases?

Answer:

  • Use Database activities: Connect, Execute Query, Execute Non Query, Disconnect.

  • Support for SQL Server, Oracle, MySQL, PostgreSQL.

  • Use parameterized queries to avoid SQL injection.

  • Scenario: Extract data from SQL → Process in Excel → Update status in the database.


12. How do you optimize robot performance?

Answer:

  • Minimize Element Exists and Find Element usage.

  • Use Workbook activities instead of opening Excel.

  • Avoid unnecessary Delay activities; use Wait for elements instead.

  • Use parallel processing if multiple tasks can run simultaneously.


13. Explain the difference between attended and unattended scheduling in Orchestrator.

Answer:

  • Attended Scheduling: Triggered manually, runs on the user’s machine.

  • Unattended Scheduling: Scheduled via Orchestrator, runs independently on remote robots.


14. What is the difference between UI Automation and API Automation in UiPath?

Answer:

  • UI Automation: Mimics user actions on applications; depends on selectors.

  • API Automation: Direct interaction with software APIs; faster, more reliable, less error-prone.

  • Scenario: Extract Salesforce data → Prefer API Automation rather than UI scraping.


15. How do you implement logging and monitoring in production workflows?

Answer:

  • Use Log Message activity with levels: Info, Warn, Error, Trace.

  • Send alerts using Send SMTP Mail Message in case of failures.

  • Monitor robot execution and queue status in Orchestrator.

  • Use dashboards and analytics in Orchestrator for KPIs.


16. How do you manage version control in UiPath?

Answer:

  • Use Git or TFS/VSTS integration with UiPath Studio.

  • Maintain separate branches for development, testing, and production.

  • Ensure proper check-in/check-out practices.

  • Use package versioning in Orchestrator for controlled deployment.


17. What are best practices for UiPath development for enterprise?

Answer:

  • Modularize workflows for reusability.

  • Use Config files for environment-specific data.

  • Implement exception handling and logging in all workflows.

  • Use dynamic selectors and minimize hardcoding.

  • Leverage Orchestrator queues for high-volume processes.

  • Optimize performance using workbook automation and minimal delays.


18. How do you handle large-scale transaction processing?

Answer:

  • Use Orchestrator Queues for batching transactions.

  • Implement REFramework for structured processing.

  • Use parallel processing if transactions are independent.

  • Log each transaction status and error details in Orchestrator.


19. How do you debug complex workflows?

Answer:

  • Use Breakpoints and Highlight Activities to track execution.

  • Use Output panel to monitor logs.

  • Inspect Locals and Watch panels to track variable values.

  • Use Slow Step mode for step-by-step execution.


20. Scenario-based Question:

Q: A process running unattended fails in the middle due to a system crash. How do you design it to recover gracefully?
Answer:

  • Use Orchestrator Queues to track processed and pending transactions.

  • Implement Retry Mechanism for failed transactions.

  • Use Transaction Status logging in Orchestrator.

  • Design Init and End Process to resume from last successful transaction.


21. What is the difference between Attended, Unattended, and Non-Production Robots in UiPath?

Answer:

Type Trigger/Use Case Description
Attended Robot Manually triggered; works alongside humans Used for desktop tasks requiring user interaction.
Unattended Robot Triggered via Orchestrator; runs independently Used for scheduled, high-volume batch processing.
Non-Production Robot Testing and development purposes Helps validate workflows before deployment in production.

22. How do you handle Citrix automation in UiPath?

Answer:

  • Citrix environments are virtual desktops where UI elements are not directly accessible.

  • Use Image-Based Automation: Click Image, Click Text, OCR activities.

  • Use Text Automation: Get Text, Set Text activities with OCR integration.

  • Use Hotkeys for navigation when UI elements are unstable.

Scenario: Automating SAP transactions in a Citrix environment using image recognition and OCR to read tables.


23. What are some best practices for building workflows in UiPath?

Answer:

  • Modular design using reusable workflows.

  • Use Config files for environment-specific data.

  • Implement exception handling in all workflows.

  • Minimize hardcoding; use arguments, assets, and variables.

  • Optimize performance using Workbook vs Excel automation.

  • Use dynamic selectors for reliability.

  • Maintain proper logging for debugging and auditing.


24. What are Orchestrator Queues and how do you optimize them?

Answer:

  • Queues store transaction items for robots to process asynchronously.

  • Features: Retry, priority, SLA, and logging.

  • Best Practices:

    • Use for high-volume data processing.

    • Implement retries for failed transactions.

    • Track transaction status: New, In Progress, Failed, Successful.

    • Use multi-robot processing for parallel execution.


25. How do you implement exception handling in REFramework?

Answer:

  • REFramework has Global Exception Handling in the Process Transaction state.

  • Retry logic is implemented using Orchestrator queues.

  • Business exceptions: Expected errors (e.g., invoice not found) → Logged and skipped.

  • Application exceptions: Unexpected errors → Retry logic triggered, then workflow terminates gracefully if retries fail.


26. What are the types of exceptions in UiPath?

Answer:

  1. System Exceptions: Occur due to environmental or technical issues (e.g., file not found, network error).

  2. Business Exceptions: Occur due to business logic or invalid data (e.g., invoice amount mismatch).

  3. Custom Exceptions: Manually thrown using the Throw activity to handle specific scenarios.


27. How do you handle large Excel/CSV data efficiently in UiPath?

Answer:

  • Use Workbook activities to avoid opening Excel (faster).

  • Use Read Range with filters to extract only required data.

  • Use DataTable operations instead of looping through rows individually.

  • For very large files, consider chunking data or using Database integration.


28. How do you integrate UiPath with APIs?

Answer:

  • Use HTTP Request activity from UiPath.Web.Activities package.

  • Steps:

    1. Define endpoint, headers, method (GET, POST, PUT, DELETE).

    2. Send request and parse response (JSON, XML).

    3. Handle authentication (Bearer token, OAuth).

  • Scenario: Fetch data from Salesforce API → Process in UiPath → Update ERP system.


29. How do you debug complex workflows in UiPath?

Answer:

  • Use Breakpoints to pause execution.

  • Use Step Into, Step Over, Step Out for controlled execution.

  • Inspect Locals and Watch panel to track variable values.

  • Use Slow Step mode to observe UI interactions.

  • Log meaningful information using Log Message activity.


30. What is the difference between a Process, Package, and Project in UiPath?

Answer:

Term Definition
Project Development folder containing workflows, dependencies, config files.
Process Published version of a project ready to run in Orchestrator.
Package Compressed zip of project files, including dependencies; versioned for deployment.

31. What is the difference between Data Scraping, Screen Scraping, and OCR in UiPath?

Feature Data Scraping Screen Scraping OCR (Optical Character Recognition)
Data Type Structured (tables) Unstructured Text from images/screens
Accuracy High Medium Medium/Low (depends on image quality)
Use Case Extract SAP/website tables Capture text from virtual apps Read scanned invoices, PDFs

32. How do you manage credentials securely in production workflows?

Answer:

  • Use Orchestrator Assets for storing credentials securely.

  • Use Windows Credential Manager for local credentials.

  • Avoid hardcoding passwords in workflows.

  • Encrypt sensitive data if stored temporarily in files.


33. How do you implement retry mechanisms in UiPath?

Answer:

  • Use Retry Scope activity for small loops.

  • For large-scale automation, use Orchestrator queue retry in REFramework.

  • Implement Try Catch blocks with conditional retries for business exceptions.


34. How do you optimize UiPath workflows for performance?

Answer:

  • Use Workbook activities instead of opening Excel where possible.

  • Avoid unnecessary Element Exists or Find Element.

  • Reduce usage of Delay activity; use Wait activities instead.

  • Minimize unnecessary screen scraping; use APIs if available.

  • Use parallel processing for independent tasks.


35. How do you handle transaction failures in Orchestrator queues?

Answer:

  • Each queue item has a status: New, In Progress, Failed, Successful.

  • Implement retry mechanism in REFramework.

  • Use Business Exception for expected errors → log and skip.

  • Use Application Exception for unexpected errors → retry or escalate.

  • Track failures and send notifications via email.


36. How do you perform Citrix automation with dynamic UI elements?

Answer:

  • Use Image and Text Automation (OCR-based).

  • Implement Anchor Base activities for stable reference points.

  • Use Hotkeys and keyboard navigation to reduce dependency on unreliable selectors.

  • Validate outputs using OCR Text Extraction or screen capture comparison.


37. What are some common challenges faced in UiPath automation?

Answer:

  • Dynamic or unstable selectors.

  • Application crashes or slow response times.

  • Handling large volumes of data efficiently.

  • Integration with legacy systems or APIs.

  • Citrix/virtual desktop automation limitations.

  • Ensuring robust exception handling and recovery.


38. How do you implement email automation in UiPath?

Answer:

  • Use Send Outlook Mail Message for Outlook integration.

  • Use Send SMTP Mail Message for other mail servers.

  • Use Get Outlook Mail Messages / IMAP / POP3 for reading emails.

  • Attach files, filter by subject, sender, or date, and process attachments automatically.


39. How do you monitor and maintain automation in production?

Answer:

  • Use Orchestrator dashboards to monitor robot execution, queue items, and SLA.

  • Set up alerts and notifications for failures or SLA breaches.

  • Review logs daily for exceptions or failed transactions.

  • Implement scheduled maintenance and workflow updates as needed.


40. Scenario-Based Question:

Q: A process automating SAP transactions fails intermittently due to slow system response. How would you make it robust?
Answer:

  • Use Retry Scope or Element Exists with dynamic delays instead of fixed delays.

  • Implement global exception handling in REFramework.

  • Log each retry attempt and error in Orchestrator.

  • Optimize selectors and avoid relying on unstable UI elements.