Topic: Interview Questions with Answers On Load Testing

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1. What criteria would you use to select Web transactions for load testing?

this again comes from voice of customer, which includes what
are the very commonly used transactions of the applications, we cannot
load test all transactions , we need to understand the business
critical transactions , this can be done either talking.

2. For what purpose are virtual users created?

Virtual users are created to emulate real users.

3. Why it is recommended to add verification checks to your all your scenarios?

To verify the Fnctional flow....verification checks are used in the scenarios

4. In what situation would you want to parameterize a text verification check?

I think verification is the process done when the test results
are sent to the developer, developer fixes that and the recitification
of the bugs. Then testor need to verification of the bugs which is sent
by him.

5. Why do you need to parameterize fields in your virtual user script?

need for parameterisation is ,for eg. test for inserting a
record in table, which is having a primery key field. the recorded
vuser script tries to enter same record into the table for that many no
of vusers. but failed due to integrity constraint. in that situation we
definetly need parameterisation.

6. What are the reasons why parameterization is necessary when load testing the Web server and the database server?

 parameterization is done to check how your application
performs the same operation with different data.In load runner it is
necessary to make a single user to refer the page for several times
similar in case of database server.

7. How can data caching have a negative effect on load testing results?

yes, data caching have a negative effect on load testing
results, this can be altered according to the requirments of the
scenario in the run-time settings.

8. What usually indicates that your virtual user script has dynamic data that is dependent on you parameterized fields?

Use the extended logging option of reporting.

9. What are the benefits of creating multiple actions within any virtual user script?

Reasuability. Repeatability, Reliability.

10. Load Testing - What should be analyzed.

To determine the performance of the system following objectives to be calculated.

1) Response time -: The time in which system responds to a
transaction i.e., the time interval between submission of request and
receiving response. 
2) Think time -: Time

11. What is the difference between Load testing and Performace Testing? 

Performance testing verifies loads, volume and response time as
defined by requirements while load testing is testing an application
under heavy loads to determine at what point the system response time
degrades.

Author	Message
poli Senior Member Joined: 03Apr2007 Online Status: Offline Posts: 462	Topic: Interview Questions with Answers On Load Testing Posted: 27Jun2007 at 12:19am
	1. What criteria would you use to select Web transactions for load testing? this again comes from voice of customer, which includes what are the very commonly used transactions of the applications, we cannot load test all transactions , we need to understand the business critical transactions , this can be done either talking. 2. For what purpose are virtual users created? Virtual users are created to emulate real users. 3. Why it is recommended to add verification checks to your all your scenarios? To verify the Fnctional flow....verification checks are used in the scenarios 4. In what situation would you want to parameterize a text verification check? I think verification is the process done when the test results are sent to the developer, developer fixes that and the recitification of the bugs. Then testor need to verification of the bugs which is sent by him. 5. Why do you need to parameterize fields in your virtual user script? need for parameterisation is ,for eg. test for inserting a record in table, which is having a primery key field. the recorded vuser script tries to enter same record into the table for that many no of vusers. but failed due to integrity constraint. in that situation we definetly need parameterisation. 6. What are the reasons why parameterization is necessary when load testing the Web server and the database server? parameterization is done to check how your application performs the same operation with different data.In load runner it is necessary to make a single user to refer the page for several times similar in case of database server. 7. How can data caching have a negative effect on load testing results? yes, data caching have a negative effect on load testing results, this can be altered according to the requirments of the scenario in the run-time settings. 8. What usually indicates that your virtual user script has dynamic data that is dependent on you parameterized fields? Use the extended logging option of reporting. 9. What are the benefits of creating multiple actions within any virtual user script? Reasuability. Repeatability, Reliability. 10. Load Testing - What should be analyzed. To determine the performance of the system following objectives to be calculated. 1) Response time -: The time in which system responds to a transaction i.e., the time interval between submission of request and receiving response. 2) Think time -: Time 11. What is the difference between Load testing and Performace Testing? Performance testing verifies loads, volume and response time as defined by requirements while load testing is testing an application under heavy loads to determine at what point the system response time degrades. Post Resume: Click here to Upload your Resume & Apply for Jobs

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