Mainframe Interview Questions and Answers

Last updated on Feb 06, 2023
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Mainframe Interview Questions

Mainframe testing is somewhat similar to web-based testing. It is actually defined and designed for mainframe system testing. It has a major role in application development. It comes into action to test the test case which is developed. To get into complete the complete details about the mainframe interview questions we are mentioning Questions and Answers that can be a help to you. Mainframe testing action usually takes place over the code which has already been deployed. Various sets of data combinations are used in the input file. A terminal emulator is usually used to access the applications running on the mainframe. The only thing that is required in the client’s system is Emulator installed in it. The tester must be aware of the CICS screen navigation while starting Mainframe testing.

You will get to about the complete details of Mainframe Testing in Mainframe interview questions that we are mentioning below.

Most Frequently Asked Mainframe Interview Questions

Here in this article, we will be listing frequently asked Mainframe Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q11. Name the various types of tables spaces.

There are mainly three types of tablespaces

  • Simple
  • Segmented
  • Partitioned
Q12. Explain the meaning of SPUFI

SPUFI stands for SQL Processing Using File Input. It is basically a tool driven by menus that the developers use to create objects in the database

Q13. What do you mean by an alias?

An alias is an alternative or a substitute to a synonym. They are created especially for distributed environments so that the developers can avoid using location qualifiers for tables or views.

Q14. Where is the VSAM KSDS placed?

The VSDM KSDS is placed at the BSDS. This question acts as a mainframe support interview question

Q15. What is meant by an isolation level?

Isolation level is a degree by which the focused activation group is separated or isolated from the executed activation group at the same time is called an isolation level.

Q16. Name all the file-OPEN modes

There are four file OPEN modes, they are:

  • I-O
Q17. Is the order of the WHEN clause important in an EVALUATE statement? Is the order of the WHEN clause significant in an EVALUATE statement?

Yes, the order of the WHEN clause is significant in an EVALUATE statement. It has to take place from the top to the bottom and thereby, the order of the values has an effect on the results and may impact the outcome

Q18. Are scope terminators compulsory? If they are, when?

Scope terminators are mandatory for EVALUATE statements and in-line PERFORMS. These are always declared with complete transparency to improve its readability

Q19. What do you mean by linkage section?

The linkage is a part of a program that maps to the specific data in the program's working storage.

A linkage section is an area where any shared data item is defined and declared.

Q20. Explain how you can characterize tables in COBOL

The happens condition is used to characterize exhibits or tables in COBOL. The components of the table can be eluded by using INDEX or SUBSCRIPT

Advantages of Mainframe testing
  • Flexible infrastructure
  • Your information is your power - centralized data hub doesn’t let it go waste.
  • It provides a better yielding ability to the process.
  • It provides you with the capability of recovering from the error
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