UiPath-ADPv1 Advanced Debugging Practice Test 2 — 15 Questions

Question 1

You are debugging a UiPath process that fails only in a specific environment because an application window's title differs slightly from development. You need to determine whether the failure is due to selector mismatch and capture evidence for a fix. (Choose two.)

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Use the UI Explorer to validate the selector against the live application and highlight the matched element.. UI Explorer validates the selector against the live application and reveals the actual element attributes, while copying the runtime selector lets you compare those attributes directly against the development version. Together they pinpoint the diverging attribute, typically the window title, and provide concrete evidence for correcting the selector, such as adding a wildcard.

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Set the project's 'ExecutionMode' to Debug so the runtime records selector failures to the Output panel.

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Increase the activity's TimeoutMS property so the selector has more time to find the element in the other environment.

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Enable 'Highlight Elements' and run the project in Debug mode to visually confirm which element the selector targets at runtime.

Question 2

An automation fails intermittently during a Data Table processing loop. You need to inspect the contents of a specific variable at the exact moment of failure without pausing the entire process execution. Which debugging approach is most efficient?

Accepted Answer

Insert a Log Message activity with an informative string including the variable value.. Using the Log Message activity with a Trace level or utilizing the 'Write Line' activity combined with an output file allows you to capture runtime data values asynchronously. This is vital in production or complex environments where standard breakpoints disrupt timing-sensitive application interactions. By logging state changes to a file or Orchestrator, developers can reconstruct the execution path post-mortem without relying on active session control, ensuring minimal impact on process performance.

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Set a global breakpoint on the loop and manually inspect the variable.

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Wrap the loop in a Try-Catch block and use the Debugger's 'Continue' feature.

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Switch to 'Slow Step' mode during the execution of the loop.

Question 3

Which TWO actions should you take to effectively isolate a 'Selector Not Found' error within a complex, dynamic web application?

Accepted Answer

Use the 'Highlight' feature in the Selector Editor to confirm element identification.. Isolating dynamic selector issues requires a combination of robust validation techniques. By using the 'Highlight' feature, you visually verify target identification, while the 'UI Explorer' allows for granular adjustment of selector attributes to handle dynamic IDs or changing tree structures. Mastering these tools ensures that selectors remain stable despite application updates, preventing common runtime failures that arise when UI elements change their properties unexpectedly during the process execution.

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Reduce the TimeoutMS property on the activity to 0.

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Increase the 'DelayAfter' property to 60 seconds.

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Disable the 'Simulate Click' property permanently.

Question 4

Refer to the exhibit. You encounter this error while executing a Linq query on a DataTable. Which debugging strategy is the most effective way to identify the cause?

Accepted Answer

Use the Locals panel to check the 'Rows.Count' property of the DataTable before the assignment.. This error typically occurs when a Linq method like 'First()' or 'Single()' is called on an empty collection, as these methods expect at least one result. By adding a breakpoint before the assignment and inspecting the DataTable count in the Locals panel, you can confirm if the query produced any results. This helps verify your filtering logic or confirm if the source data is unexpectedly empty before processing occurs.

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Increase the 'Retry Scope' count on the activity.

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Change the execution mode to 'Debug' and run from start.

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Wrap the entire sequence in a 'Parallel' activity.

Question 5

Refer to the exhibit. You are debugging a NullReferenceException in a project that uses a 'ConfigDict'. What is the most likely culprit, and how should you verify it?

Accepted Answer

The ConfigDict variable is missing a default value; verify by typing 'ConfigDict is Nothing' in the Immediate Panel.. A NullReferenceException indicates that a variable is uninitialized or null when accessed. In UiPath, this often happens if the dictionary was declared but not instantiated using the 'New Dictionary(Of String, Object)' constructor. Checking the variable's value in the Immediate Panel during a breakpoint is the fastest way to confirm if it is null, allowing you to fix the initialization logic in the variable panel or setup block.

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The dictionary key does not exist; verify by checking the Orchestrator assets.

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The variable scope is too small; verify by checking the 'Variables' pane filters.

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The dictionary contains objects of the wrong type; verify by using the 'Type Into' activity.

Question 6

When debugging a process that involves external API calls, which THREE techniques help ensure the request payload and response data are correctly captured?

Accepted Answer

Log the serialized JSON string of the request body immediately before the HTTP Request activity.. Effective API debugging involves transparency. By logging the entire JSON request before sending it, you can verify payload formatting. Logging the response status code and body allows you to analyze why a request might have failed (e.g., 400 Bad Request). Using external tools like Postman validates the API independently of the robot, isolating whether the issue lies within the UiPath workflow or the API endpoint itself.

Answer

Always set the 'Timeout' property to 1ms to catch connectivity issues early.

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Disable all logging in the project to improve API request speed.

Question 7

You are debugging a Workflow that uses a 'State Machine' and notice it gets stuck in a loop between two states. Which tool provides the best visibility into the transition conditions during runtime?

Accepted Answer

Place a breakpoint on the 'Transition' condition and inspect variables in the Locals panel.. The 'Breakpoints' and 'Locals' panels are essential for monitoring State Machines. By placing a breakpoint on the 'Condition' expression of a transition, the developer can pause the robot just before it evaluates the logic. Inspecting the variables involved in the condition ensures that the evaluation is behaving as expected, allowing you to diagnose why the robot is incorrectly re-entering a specific state repeatedly.

Answer

Use the 'Validate' button in the design ribbon.

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Check the 'Output' panel for infinite loop warnings.

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Increase the 'MaxLoop' property of the State Machine.

Question 8

While debugging a background process, the robot intermittently fails to click a button. You suspect the UI element is not ready, despite using the 'Click' activity. What is the most robust way to ensure the element is interactive?

Accepted Answer

Use the 'Wait Element Appear' activity before the click to synchronize.. Using the 'Wait Element Vanish' or 'Wait Element Appear' activities is the industry-standard way to synchronize the robot with the application state. By explicitly waiting for the target element to become available or for a loading spinner to disappear before clicking, you eliminate timing issues. This is significantly more reliable than hard-coded delays, as it reacts to the actual state of the UI instead of arbitrary time intervals.

Answer

Add a hard-coded 'Delay' of 10 seconds before every click.

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Disable the 'WaitForReady' property to ensure immediate execution.

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Replace the 'Click' activity with a 'Send Hotkey' activity.

Question 9

Which TWO of the following statements are true regarding the use of the 'Immediate' panel during an active debugging session?

Accepted Answer

You can modify the value of a variable during a paused debugging session.. The Immediate panel is a powerful, real-time diagnostic tool. It allows developers to evaluate expressions, call methods, or modify variables mid-execution. It is indispensable for testing complex logic or verifying object states without having to modify the workflow code, recompile, or restart the process. This capability significantly reduces the time spent on trial-and-error debugging and provides deep visibility into the runtime state of the robot.

Answer

The Immediate panel only works for variables defined in the main workflow scope.

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Changes made in the Immediate panel are permanently saved to the project file.

Answer

You must use the 'Set' keyword to assign values to variables.

Question 10

You are debugging a process that processes thousands of rows. You need to check the value of a variable only when it meets a specific condition (e.g., RowID equals '12345'). What is the best debugging method?

Accepted Answer

Set a conditional breakpoint on the activity with the RowID criteria.. Using a conditional breakpoint is the most efficient way to skip over thousands of iterations. By setting a breakpoint on the activity and specifying a condition in the breakpoint settings (e.g., RowID = '12345'), the robot will only pause when that specific condition is met. This saves significant developer time and avoids the tedious process of manually stepping through each iteration in the loop until the target is reached.

Answer

Use a standard breakpoint and manually click 'Continue' for every iteration.

Answer

Wrap the loop in an 'If' activity and add a 'Log Message' inside the 'Then' block.

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Set the 'Log Level' to 'Trace' and filter the output in Orchestrator.

Question 11

Which TWO of the following are best practices when using the 'Try Catch' activity for robust error handling?

Accepted Answer

Use specific exception types for different catch blocks.. Try Catch is the cornerstone of defensive automation. By using specific exception types, you ensure that the robot reacts appropriately to different kinds of failures (e.g., catching a 'SelectorNotFoundException' differently from a 'SystemException'). Including a 'Finally' block is equally important, as it guarantees that critical cleanup tasks like closing browser instances or releasing file locks are always performed, regardless of whether the process succeeded or crashed.

Answer

Use a generic 'System.Exception' for every catch block.

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Always leave the 'Exception' variable empty to hide errors.

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Place the Try Catch activity inside every single activity.

Question 12

You are debugging a workflow and need to see the value of a variable, but the Locals panel is too cluttered. Which alternative panel is best for focusing on a specific variable's current value?

Accepted Answer

The 'Watch' panel.. The 'Watch' panel is designed specifically for this purpose. Unlike the Locals panel, which shows everything, the Watch panel allows you to manually add specific variables or expressions to monitor. This creates a filtered, persistent view of only the data you care about, making it much easier to track changes over time during complex debugging sessions without being distracted by irrelevant variable data.

Answer

The 'Output' panel.

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The 'Properties' panel.

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The 'Project' panel.

Question 13

While debugging an automation, you notice that a variable updates correctly, but the UI element based on that variable does not change. What is the most likely cause?

Accepted Answer

The input method did not trigger the 'on-change' event required by the application.. If the variable is correct but the UI hasn't updated, the application is likely experiencing a delay in rendering. Modern web applications often require a trigger to refresh the UI after a value is input. The most effective fix is to add a 'Simulate Click' or 'Send Hotkey' (like Enter or Tab) to force the browser to trigger its internal 'on-change' event, ensuring the UI reflects the new variable value.

Answer

The variable scope is too large.

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The browser is stuck in a loop.

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The selector is not unique enough.

Question 14

Refer to the exhibit. You are debugging a performance issue in a process that uses this configuration. What impact does 'ExecutionMode: Parallel' have on debugging?

Accepted Answer

It complicates log sequencing and introduces potential race conditions.. The Parallel execution mode is a significant challenge for debugging. When multiple activities run at the same time, the order of log entries in the Output panel becomes non-deterministic, making it extremely difficult to trace the sequence of events. Furthermore, if the parallel branches share variables, you may encounter race conditions that are nearly impossible to reproduce consistently, necessitating the use of synchronization primitives or disabling parallel mode to isolate the issue.

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It makes debugging easier by speeding up execution.

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It has no impact on debugging or log sequencing.

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It forces the compiler to ignore all breakpoints.

Question 15

You are debugging a complex ReFramework process. An unhandled exception occurs in the 'Process Transaction' state, but the 'Get Transaction Data' state is not correctly logging the error count. Which debugging tool or technique is most effective for identifying the specific variable state change leading to this logic gap?

Accepted Answer

Using breakpoints and the Locals panel to inspect variable values.. Using the 'Locals' panel alongside 'Step Into' allows developers to monitor variable values in real-time as the execution pointer moves across state machine transitions. This method is crucial because it captures the precise moment a variable is modified or overwritten during a transition, which is often where logical errors in ReFramework hide, ensuring that error counters remain accurate across iterative transactions.

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Restarting the entire process with the 'Slow Step' feature enabled.

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Analyzing the Orchestrator job logs after the process fails.

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Increasing the logging level to 'Trace' in the NLog configuration file.