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Monday, August 8, 2016

Top 20 Load Runner Tool Interview Questions And Answers.

Top 20 Load Runner Tool Interview Questions And Answers. Latest Load Runner Interview Questions With Answers. Most Frequently Asked Load Runner Interview Questions For Freshers And Experienced.

1. What is load testing?

Load testing is to test that if the application works well with the loads from large number of simultaneous users and transactions. It also used to determine whether it can handle peak usage periods.

2. What is load runner?

Load Runner is a performance testing tool from HP. This tool supports all aspects such as Load, Stress, Endurance, data volume and spike Testing.

3. What are all the components of LoadRunner?

Following are the components of LoadRunner
•The Virtual User Generator
•Controller, and the Agent process
•LoadRunner Analysis and Monitoring
•LoadRunner Books Online


4. What Component of LoadRunner is used to record a script?

The Virtual User Generator (VuGen) component is used to record a script and it enables you to develop Vuser scripts for a variety of application types and communication protocols.

5. What is a rendezvous point?

Rendezvous points are introduced into Vuser scripts to simulate more users on the server. Rendezvous points instruct Vusers to wait during test execution in order to perform the tasks simultaneously.
For example, in a banking application, Rendezvous points are inserted for 100+ multiple users to deposit money simultaneously.

6. What is a scenario?

A scenario is nothing but an event that occurs for each testing session.
For example, a scenario defines
•Number of users
•Action to be performed
•Virtual machines system


7. How can we debug a LoadRunner script?

VuGen contains two options to debug Vuser scripts
•Run Step by Step command and
•Breakpoints.

We can also manually set the message class within your script using the lr_set_debug_message function.

8. How can we perform functional testing under load?

Functionality under load can be tested by running several Vusers concurrently. By increasing the Vusers, it is necessary to determine how much load the server can sustain.

9. What is the relationship between Response Time and Throughput?

The Throughput shows the amount of data in bytes that the Vusers received from the server in a second. When It is compared with transaction response time, throughput and response time get decreased.
The peak throughput and highest response time would occur approximately at the same time.

10. What does vuser_init and vuser_end action contain?

Vuser_init action contains procedures to login to a server and Vuser_end section contains log off procedures.

11. What is the difference between standard log and extended log?

The standard log sends a subset of functions and messages to the output log and subset of functions depends on the Vuser type.
Extended log sends a detailed script execution messages to the output log. It is mainly used during debugging when user needs information about Parameter substitution.

12. What are all the types of Goals in Goal-Oriented Scenario of Load Runner?

Load Runner provides you with five different types of goals:
•Number of concurrent Vusers
•Number of hits per second
•Number of transactions per second
•Number of pages per minute
•Transaction response time


13. What is a function to capture dynamic values in the web vuser script?

Web_reg_save_param is the function that saves dynamic data information to a parameter.

14. What are the Load Runner testing process?

Following are the testing process in LoadRunner:
•Plan load test
•Create Vuser Scripts
•Define Scenario
•Run Scenario
•Analyze results


15. What is remote command launcher?

The remote command launcher enables the controller to start applications in the host machine.

16. How can we develop the database vuser script?

Vuser scripts can be developed either by recording with the load vuser script generator or by using Load runner vuser script template.

17. How do you load a load runner Agent?

While running the scenario, loadrunner controller instructs the remote agent dispatcher to launch loadrunner agent. The controller instructs the loadrunner agent to initialize, run, pause and stop the vusers.
18. What is the difference between hits/second and requests/second?
Hits per second means the number of hits the server receives in one second from the vuser.
Request per second is the number of request the vuser will request from the server.

19. What are the advantages of load runner?

Following are the advantages of Load Runner:
•Reduces human intervention
•Reduces the requirement of the systems
•Helps in the better usage of time and money
•Effective utilization of automation
•Single point execution


20. What is the vuser in the scenario?

The vuser is the virtual users who can simulate the real users. The virtual users who take the place of real users’s operating client software, such as IE sending requests using the HTTP protocol to IIS or Apache web servers.

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