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

What is the meaning of VSAM RETURN-CODE 28?

3 21732

On which datasets You can have ALT INDEX?

2 6143

How many Alternate Indexes you can have on a dataset?

AB Inc,

2 9928

Is it slower if you access a record through ALT INDEX as compared to Primary INDEX? Why?

1 5966

Yes. Because the alternate key would first locate the primary key, which in turn locates the actual record. Needs twice the number of I/Os.

2417

What is RECOVERY and SPEED parameters in DEFINE CLUSTER command?

1 14333

Describe SHAREOPTIONS parameter (SHR) in Define Cluster command.?

1 17739

What does the KEYRANGES parameter in Define Cluster commend do?

1 7462

What are the optional parameters to the input dataset While loading the empty cluster with the data records?

IBM,

1 6185

What is IDCAMS? and what is the purpose of it?

4 18997

How to delete a member using JCL.?

5 15423

What is the Difference between LDS & ESDS ?

3 15331

Is a delete operation possible in an ESDS?B. Is rewrite operation possible in ESDS ?

3 10375

What is an alternate index and path ?

Infosys, TCS,

2 26748

How many buffers are allotted to VSAM KSDS and ESDS?

1 8240

Un-Answered Questions { MainFrame }

What is amode(31)

1173

how to pass the parameters from jcl to assembler pgm?

1108

How dummy is used in jcl?

1147

How does a cursor work?

985

How to resolve the error "WER488A JOIN CAPACITY EXCEEDED" I am using SYNCSORT with JOINKEYS to compare 2 files. I am Getting error - > WER488A JOIN CAPACITY EXCEEDED There are 2 files to be compared with about 2 million records each. LRECL is 3665. Can somebody give a pointer as to how to resolve this problem? I am using SYNCSORT with JOINKEYS to compare 2 files. I am Getting error - > WER488A JOIN CAPACITY EXCEEDED There are 2 files to be compared with about 2 million records each. LRECL is 3665. Can somebody give a pointer as to how to resolve this problem?

8583

What are the main control blocks available in ims db?

1094

Define gdg?

990

System Testing for Mainframe Developers What is System Testing? integration testing ? what's the procedure ..

2076

How to access db2 tables in mainframe?

1051

A word in the computer memory is identified by_________

998

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

1046

How to create backup table in db2?

1090

What are the uses of ppt in cics?

992

what does the opcode free do?

1952

What is the difference between PIC 9.99 and 9v99 in COBOL?

1333

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