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

COBOL (1072)
JCL (1031)
CICS (755)
DB2 (1122)

IMS (143)
IDMS (107)
Natural (81)
ADABAS (26)

REXX (60)
Assembler (68)
CLIST (6)
QMF (32)

MVS (25)
OS390 (10)
OS 2 (7)
VSAM (319)

IBM MainFrame Interview Questions

Questions Answers Views Company eMail

What is a result table?

1 5728

What is the SQL Communications Area and what are some of its key fields?

1 5121

Usually, which is more important for DB2 system performance - CPU processing or I/O access?

1 4370

How would one remove old reorg information from the DB2 catalog?

2 6577

The only place of VSAM KSDS in DB2 is?

IBM,

2 8146

What is DCLGEN?

2 15888

Where is the output of EXPLAIN stored?

2 6968

What is the function of buffer manager?

1 5885

What techniques are used to retrieve data from more than one table in a single SQL statement?

2 6609

What is a lock?

1 5076

What should be specified along with a cursor in order to continue updating process after commit?

IBM,

1 5511

How does DB2 use multiple table indexes?

1 5900

What is meant by repeatable read?

4 10650

Compare a subselect to a join?

1 5104

Describe the elements of the SELECT query syntax?

3 6653

Un-Answered Questions { IBM MainFrame }

What is the function of //cntl statement?

1408

how do you reference the ksds vsam file formats from cobol programs

1254

How to code the db2 queries using rexx?

1054

Specify the requirements for automatic task initiation?

1068

What is the main function of linear dataset?

1154

what is the probability of a complete system distortion under high end low performing multiprocessor job?

2528

A dd statement consists of 4 fields. Name them?

1486

Can I share my data with other jobs? How?

1207

How can a stopped job be started again?

1248

What is the difference between Call and a Link?

1277

accept ws-date from date will return the current date?

1081

define clustering index.

1074

Distinguish among erase, erase permanent, erase selective and erase all?

1755

What is the difference between structured cobol programming and object alternativelyiented cobol?

1314

What are the objectives of dbms in ims?

1148

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