MainFrame Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

IBM MainFrame (5234)
IBM AS400 (1355)
IBM PL/1 (31)

MainFrame Interview Questions

Questions Answers Views Company eMail

List and explain the different type of data structures?

1 1562

What is the difference between access path and Dynamic select?

1 1894

Why would you prefer OPNQRYF than logical file?

1 1684

What the purpose of the keywords FIFO, LIFO, FCFO?

1 1788

What is the difference between regular logical file and join logical file?

1 1844

Distinguish between logical file and physical file?

1 2049

What is field reference file?

1 1757

What is the necessary keyword used in a physical file to refer field definitions from the field reference file?

1 1821

What is the purpose of reorganizing the physical file i.e. , RGZPFM?

1 1873

What is the purpose of CHGPF (Change physical file) command?

1 2055

What is purpose of declarative statement DEFN?

1 1557

What is the purpose of SFLNXTCHG keyword in a subfile?

1 1729

What is the difference between Array and Table?

1 1862

What are the different types of access paths maintained on the file?

1 1608

How can you identify End of file in CLP program?

1 1958

Un-Answered Questions { MainFrame }

How joinkeys helps in sort?

984

Explain host variables?

987

what is the procedure and explain about real time scenario.

1954

please..could u give an example about USAGE IS POINTER ..and explain why and when we use it ?

2464

What is the use of uni-rexx?

930

Explain the like inverted list?

945

What is hierarchical database?

3711

what is the command to know key fields of file?

1173

Where can program checkpoints be stored for use in a restart?

1431

why is as/400 called object oriented machine?

1677

What are the different versions of gdg named?

990

What is redefines clause in COBOL?

1285

Can you define temporary storage?

1127

how would you create a temporary dataset? And where will you use them?

1396

How can you find out the # of rows updated after an update statement?

1107

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