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Top 18 Loadrunner Interview Questions and Answers

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LoadRunner is one of the most popular performance testing tools used by software testing professionals. It is used to simulate user activities and measure the performance of applications and systems. As such, LoadRunner interview questions are becoming increasingly popular among employers looking for experienced performance testers.

In a LoadRunner interview, the interviewer will ask questions related to the LoadRunner application and performance testing. These include questions about the different components and features of the LoadRunner tool, its user interface, how to set up and use the LoadRunner tool, and how to analyze performance test results. The interviewer may also ask questions regarding the different types of performance testing, such as load testing, stress testing, and scalability testing, and the different protocols and scenarios used in LoadRunner.

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The best way to prepare for a LoadRunner interview is to brush up on your knowledge of the tool and the performance testing process. There are many resources available online to help you do this, including tutorials, guides, and practice questions. In addition, it helps to have a clear understanding of the performance testing process and the different types of testing you will likely be asked about.

At the same time, it is important to be prepared to answer questions related to the specific performance testing project you are interviewing for. The interviewer is likely to ask about your experience with the LoadRunner tool, your familiarity with the performance testing process, and your ability to analyze and interpret data.

Finally, it is important to be familiar with the LoadRunner interview questions and answers available online. There are many websites that provide sample interview questions and answers, which can help you practice your answers. With the right preparation, you can be well-prepared to answer any questions the interviewer may have.

Overview of Loadrunner Interview Process

The Loadrunner interview process is designed to evaluate a candidate’s technical knowledge, as well as their problem- solving and communication skills. The interviews typically begin with a telephone interview, in which the recruiter will ask the candidate general questions about their experience with Loadrunner and other programming languages. This will be followed by one or more technical interviews, which will typically involve discussions of specific performance- related problems and the candidate’s approach to solving them. The recruiters will also ask the candidate questions about their experience with relational databases, scripting languages, or other technologies that are relevant to Loadrunner.

The next step in the interview process is typically an onsite interview with one or more members of the Loadrunner team. During this interview, the candidate will be asked to demonstrate their understanding of Loadrunner by writing and executing code. This may include creating a test script and running it against a test server. The candidate will also be asked to answer questions about their previous experience with Loadrunner and other related technologies.

Finally, the candidate may also be asked to complete a written assignment, such as creating a test plan or report with specific Loadrunner- related components. The assignment will typically be focused on testing a specific system or application. This assignment is meant to further evaluate the candidate’s understanding of the Loadrunner platform and the processes needed to properly test a system.

The Loadrunner interview process is designed to ensure that the right fit is chosen for the position. By testing the candidate’s technical knowledge, problem- solving skills, and communication skills, the recruiters can identify a candidate who is knowledgeable and able to quickly learn and apply new skills. Once the process is complete, the candidate will be able to join the Loadrunner team and help make the company’s applications more efficient and reliable.


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Top 18 Loadrunner Interview Questions and Answers

1. What is Loadrunner?

Loadrunner is an HP software tool that helps in analyzing, measuring, and diagnosing the performance of web applications and other types of applications. It does so by simulating multiple users who access the application from different locations at the same time and generates test results to identify potential performance risks. Loadrunner can be used to simulate user activity on various protocols and technologies such as web, Oracle, Siebel, PeopleSoft, SAP, and more.

2. What are the components of Loadrunner?

Loadrunner consists of four main components: the Controller, the Load Generator, the Analysis Module, and the VuGen (Virtual User Generator). The Controller is the main component of Loadrunner that is responsible for organizing, creating, running, and monitoring the tests. The Load Generator simulates the actual user activity and generates traffic on the application. The Analysis Module allows users to analyze the test results to identify potential performance risks. Finally, the VuGen allows users to create virtual user scripts that are used to simulate the actual user activity.

3. What are the main features of Loadrunner?

Loadrunner’s main features are its ability to simulate user activity, measure the performance of applications, and generate reports. Loadrunner can simulate a variety of scenarios, from basic tests to complex scenarios, such as simultaneous user operability and multiple load patterns. It can also measure response times, server performance, and resource utilization. Finally, Loadrunner can generate comprehensive reports for users to analyze and make informed decisions about the performance of their applications.

4. What types of performance tests can be done with Loadrunner?

Loadrunner can be used to perform a variety of different types of performance tests, such as load tests, scalability tests, stress tests, endurance tests, and failover tests. Load tests are used to test the response time of the application under a certain amount of load, while scalability tests are used to measure the application’s ability to scale up or down depending on the load. Stress tests are used to determine the breaking point of an application, while endurance tests are used to measure the application’s performance over a long period of time. Finally, failover tests are used to measure the application’s ability to recover from a failure.

5. What are the advantages of using Loadrunner?

Loadrunner has many advantages. It can simulate a variety of scenarios to measure the performance of applications. It can also identify potential performance risks and generate comprehensive reports that can be used to make informed decisions. Additionally, Loadrunner is easy to use and can be used to test applications on any platform. Finally, Loadrunner is cost-effective and offers a wide range of features to help users get the most out of their performance testing.

6. What types of protocols does Loadrunner support?

Loadrunner supports a wide range of protocols, such as web (HTTP/HTML), Oracle (RPC), Siebel (Siebel), PeopleSoft (Tuxedo), SAP (SAPGUI), mainframe (Citrix), and more. Additionally, Loadrunner also supports custom protocols, such as web services, network, and terminal emulation protocols.

7. How do you create a Loadrunner script?

Creating a Loadrunner script requires the use of the Virtual User Generator (VuGen) component of Loadrunner. This component is used to create virtual user scripts that simulate user activity on the application. To create a Loadrunner script, users must first record a business process with VuGen, which captures all the steps of the process. Then, users can edit the script to add parameters, add transactions, and customize the script to meet their specific needs.

8. What are the different types of graphs in Loadrunner Analysis?

Loadrunner Analysis provides several different types of graphs that can be used to analyze the performance of an application. These include Response Time Graphs, Transaction Performance Graphs, Transaction Throughput Graphs, User Load Graphs, and more. Each of these graphs can provide valuable insights into performance, allowing users to identify potential bottlenecks or areas of improvement.

9. What is the difference between Loadrunner and Performance Center?

Loadrunner and Performance Center are both HP software tools for performance testing. The main difference between the two is that Performance Center is a cloud-based performance testing solution, while Loadrunner is a desktop-based solution. Additionally, Performance Center offers more analysis capabilities, such as advanced reporting and analysis, as well as the ability to manage multiple projects in the same environment.

10. What is the purpose of ramp-up and ramp-down in Loadrunner?

Ramp-up and ramp-down are two features of Loadrunner that are used to control the rate at which virtual users are added or removed from the test. Ramp-up is used to slowly add virtual users to the test, while ramp-down is used to slowly remove users. This helps to ensure that the test is conducted in a more realistic and effective manner.

11. What are the benefits of using LoadRunner?

LoadRunner provides several benefits for performance testing. It enables the testing team to test applications under simulated load conditions and measure system performance, enabling them to identify and fix bottlenecks and optimize the system. It also helps identify potential risks and allows teams to plan for capacity.

LoadRunner also enables detailed analysis of the performance of the application, enabling teams to identify issues and fix them quickly. It also offers advanced reporting capabilities, allowing teams to identify trends and generate reports to present to stakeholders.

12. What are the different protocols used by LoadRunner?

LoadRunner supports multiple protocols such as HTTP/HTML, TruClient, SAP, Oracle NCA, Web Services, FTP, Database, Citrix, and more.

13. What is a Scenario in LoadRunner?

A scenario is a set of virtual users that determines how the application will be tested. Scenarios define the properties of the virtual users, such as the number of virtual users, the load pattern and the network and protocols used.

14. What are the stages of LoadRunner?

LoadRunner consists of several stages, each of which is necessary for successful testing. These stages are preparation, recording, parameterization, scripting, execution, analysis, and reporting.

During the preparation stage, the application to be tested is identified and the testing environment is configured. During the recording stage, the scripts are created. During the parameterization stage, the scripts are modified to add dynamic data. During the scripting stage, the scripts are customized to add logic and verification. During the execution stage, the scripts are run and the results are collected. During the analysis stage, the results are analyzed and the performance of the application is evaluated. During the reporting stage, the results are reported and recommendations are made.

15. What is correlation in LoadRunner?

Correlation is the process of identifying and extracting dynamic data that is generated by the server and used by the application. Correlation is necessary in order to capture the dynamic data and pass it to the virtual users. Without correlation, virtual users would not be able to complete their tasks.

16. What are the different types of graphs available in LoadRunner?

LoadRunner provides several types of graphs to help visualize the performance test results. These include the response time graph, the throughput graph, the hits/sec graph, the transaction graph, the page breakdown graph, and the log graph.

17. What are the components of the LoadRunner analysis report?

The LoadRunner Analysis Report contains several components, including a summary section, a graph section, a transaction response time table, a list of errors, a resource utilization table, a page break down table, and a log section.

18. What is the purpose of the LoadRunner Controller?

The LoadRunner Controller is the main console used to manage and execute performance tests. It enables the user to configure the various components of the test, including the virtual users, the test duration and the load pattern. It also enables the user to start, stop and monitor the test execution. The Controller is used to analyze the test results and generate detailed reports.

Tips on Preparing for a Loadrunner Interview

  1. Research the company’s current and past projects that involve Loadrunner for a better understanding of the role.
  2. Be prepared to discuss your experience with Loadrunner, as well as any other performance testing tools.
  3. Have a clear understanding of the Loadrunner components and their purpose.
  4. Prepare to discuss strategies for setting up Loadrunner scenarios and scripting.
  5. Be familiar with the types of performance tests that Loadrunner can perform.
  6. Be prepared to explain why Loadrunner is a suitable performance testing solution.
  7. Be able to demonstrate your ability to interpret Loadrunner reports and discuss the results.
  8. Have an understanding of the additional performance testing tools that can be utilized in conjunction with Loadrunner.
  9. Practice talking through sample performance test scenarios and how you would go about scripting and running them.
  10. Prepare any questions that you have about the role or the company.
  11. Prepare to demonstrate your ability to work in a team environment and to collaborate with other members.
  12. Have a good understanding of the software development process and the role of performance testing in it.
  13. Have a clear appreciation of the importance of performance testing and why it is necessary.
  14. Be prepared to discuss your experience of running Loadrunner tests on different platforms.
  15. Be able to explain the different methods and techniques used to troubleshoot performance issues.


To conclude, Loadrunner is an important tool for any software tester, and having the right knowledge about it can make a great difference in the success of a project. To ensure you are well prepared for your Loadrunner interview, it is important to have a good understanding of the various Loadrunner interview questions and answers. By having a good knowledge of the Loadrunner tools, you can confidently demonstrate your expertise and also make sure you have a successful interview.