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

IBM MainFrame (5234)
IBM AS400 (1355)
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MainFrame Interview Questions

Questions Answers Views Company eMail

what's the biggest disadvantage of using a VSAM dataset?

Anjana, CTS, DSRC, IBM,

8 20440

what's the device independent method to indicate where a Record is Stored?

1 5768

How many times secondary space allocated?

5 10883

what is the RRN for the first record in RRDS?

2 12142

what is a Base Cluster?

HSBC, TCS,

3 10957

If FSPC(100 10 is specified does it mean that both the control interval and control area will be left empty because 100 % of both CI and ca are specified to be empty?

DSRC,

1 8392

What is a Generation Data Group (GDG)?

2 10460

How is a GDG base created?

5 26833

What is model dataset label(Model DSCB)?

1 23862

How are GDGs concatenated?

1 14824

How is a new GDG coded?

2 10202

When should DISP=MOD is used?

TCS,

6 47166

How is a dataset passed from one step to another?

DELL,

2 16370

How are datasets concatenated?

CitiGroup,

3 14241

What is the difference between the JOBLIB and the STEPLIB statements?

3 38259

Un-Answered Questions { MainFrame }

What are the two types of logging in the db2 database? Explain them.

1074

Outputs of explain are with matchcols = 0. What does this signify?

1060

Write the difference between hidam and hdam databases?

1007

What is the use of KSDS,LDS,ESDS,RRDS??what is VRRDS?? How are all these useful in realtime scenario??Plz helpme out...Its a recent question in IGATE..

8758

What is the common systems area?

1059

How and when does the db2 enforces the unique key?

1083

Is it possible to alter a table – for example adding a column, when another user is accessing or updating some columns?

1082

Explain the use of DCT ?

1079

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

1116

Can anyone provide me the source code for LOC(lines of code) counter written in REXX language which can run on IBM mainframe z/OS V1R4. The LOC counter should be able to count the comments,lines of code,blank lines in a COBOL program and JCL's

2674

How connect db2 database to datastage?

1243

Explain how do you access storage outside your cics program?

969

what do you mean by gdg in vsam?

1196

Name the command which is used to release a record on which exclusive control is gained?

1015

When are scope terminators compulsory?

1038

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