Top LoadRunner Interview Questions & Answers:

1. What is lr_output_message?

The lr_output_message function sends notifications to the Controller Output window and the Vuser log file.

2. What is lrd_stmt?

The lrd_stmt function associates a character string (usually a SQL statement) with a cursor. This function sets a SQL statement to be processed.

3. What is Throughput?

If the throughput scales upward as time progresses and the number of Vusers increase, this indicates that the bandwidth is sufficient. If the graph were to remain relatively flat as the number of Vusers increased, it would be reasonable to conclude that the bandwidth is constraining the volume of data delivered.

4. What does vuser_init action contain?

Vuser_init action contains procedures to login to a server.

5. What is think time? How do you change the threshold?

Think time is the time that a real user waits between actions. Example: When a user receives data from a server, the user may wait several seconds to review the data before responding. This delay is known as the think time. Changing the Threshold: Threshold level is the level below which the recorded think time will be ignored. The default value is five (5) seconds. We can change the think time threshold in the Recording options of the Vugen.

6. What is lr_debug_message?

The lr_debug_message function sends a debug message to the output log when the specified message class is set.

7. What is lr_error_message?

The lr_error_message function sends an error message to the LoadRunner Output window.

8. What is lrd_fetch?

The lrd_fetch function fetches the next row from the result set.

9. Types of Goals in Goal-Oriented Scenario?

Load Runner provides you with five different types of goals in a goal oriented scenario:

1. The number of concurrent Vusers
2. The number of hits per second
3. The number of transactions per second
4. The number of pages per minute

The transaction response time that you want your scenario Analysis Scenario (Bottlenecks): In Running Vuser graph correlated with the response time graph you can see that as the number of Vusers increases, the average response time of the check itinerary transaction very gradually increases. In other words, the average response time steadily increases as the load increases. At 56 Vusers, there is a sudden, sharp increase in the average response time. We say that the test broke the server. That is the mean time before failure (MTBF). The response time clearly began to degrade when there were more than 56 Vusers running simultaneously.

10. When do you disable log in Virtual User Generator, When do you choose standard and extended logs?

Once we debug our script and verify that it is functional, we can enable logging for errors only. When we add a script to a scenario, logging is automatically disabled. Standard Log Option: When you select Standard log, it creates a standard log of functions and messages sent during script execution to use for debugging. Disable this option for large load testing scenarios. When you copy a script to a scenario, logging is automatically disabled Extended Log Option: Select extended log to create an extended log, including warnings and other messages. Disable this option for large load testing scenarios. When you copy a script to a scenario, logging is automatically disabled. We can specify which additional information should be added to the extended log using the Extended log options.