Performance Test Engineer Interview Questions and Answers for Freshers

CLI mode of testing involves using command line interface to execute tests. Correlation and parameterization can be done using Bean shell processes.

• CLI mode of testing involves running tests from the command line interface

• Correlation involves identifying dynamic values in the response and replacing them with variables

• Parameterization involves replacing hard-coded values with variables

• Bean shell processes can be used to write custom code for correlation and parameterization

• Exa...read more

Use lr_trim_string function to remove trailing and leading spaces in Loadrunner

• Use lr_trim_string function to remove leading and trailing spaces

• Syntax: lr_trim_string("string", "both", " ")

• Example: lr_trim_string(" example ", "both", " ") will return "example"

To record a script in SAP using performance testing tools like Neoload or LoadRunner, certain settings need to be configured.

• Configure the recording settings in the performance testing tool to record SAP transactions

• Ensure that the SAP client and server are properly configured for recording

• Set up the proxy settings in the performance testing tool to capture the SAP traffic

• Verify that the recording is capturing the desired SAP transactions accurately

Thread dump can be taken using tools like jstack, jcmd, or through the application server console.

• jstack command can be used to take thread dump of a Java process running on the machine.

• jcmd command can be used to take thread dump of a Java process running on the machine.

• Application server console can also be used to take thread dump.

• Thread dump helps in identifying the threads that are consuming more CPU time or are stuck in a deadlock.

Passion for optimizing software performance and ensuring user satisfaction.

• Enjoy analyzing system behavior under load

• Passionate about optimizing software performance

• Fascinated by the impact of performance on user experience

Performance testing life cycle involves planning, preparation, execution, analysis, and reporting.

• 1. Planning: Define objectives, select tools, and create test plan.

• 2. Preparation: Set up test environment, create test scripts, and configure monitoring.

• 3. Execution: Run tests, monitor performance metrics, and collect data.

• 4. Analysis: Analyze results, identify bottlenecks, and optimize performance.

• 5. Reporting: Prepare performance test reports and share findings with stakehold...read more

Lr_exit is used to end a Vuser script gracefully, while Lr_abort is used to forcefully terminate a Vuser script.

• Lr_exit is used when you want to end the script normally without any errors.

• Lr_abort is used when you want to forcefully stop the script execution due to an error or other condition.

• Lr_exit allows the script to finish executing any remaining actions before ending.

• Lr_abort immediately stops the script without completing any remaining actions.

• Example: Lr_exit can be u...read more

Correlation is a technique used in performance testing to capture and replay dynamic values in subsequent requests.

• Correlation is used to handle dynamic values like session IDs, timestamps, and tokens in performance test scripts.

• It involves extracting a value from a response and passing it on to a subsequent request.

• Correlation ensures that the test script accurately simulates real user behavior by maintaining session state.

• Common correlation techniques include using regular ...read more