(1)How many bytes will take the redefine in this situation 01 a pic 9(2). 01 b redefines pic 9(2).(2)What is null & not null value in db2?(3)What is changeman tool in the mainframes environment and tell about package, freeze in changeman

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  • Sep 21st, 2013

Changeman tool is a version control tool..it is used to update or edit the existing program..

In the below program here if we want to update or to add or else to edit any snippet then in the real time scenario we should use this changeman tool......

  1. id division.

  2. program-id. disp.

  3. data division.

  4. working-storage section.

  5. 77 a pic x(10).

  6. 77 b pic x(10).

  7. procedure division.

  8.        move a to b.

  9.        display b.

  10.        stop run.

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  • Nov 26th, 2013

2 byes only

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  • Nov 5th, 2014

Null means 0 & Not Null means non-zero

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Jyothi Pottabathula

  • Aug 10th, 2015

Changeman is used for version controlling of different COBOL programs or one program over different enhancements.
Package is a library where we store the programs for a particular enhancement.

Freeze is the state of package which defines the availability of package for further changes. Freeze means, the changes have be frozen and package is ready for implementation.

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chandan saha

  • Sep 3rd, 2015

1. It will contains 2 bytes.
2. Null means the field type is defined but its empty. The field does not contain any value. If any field defined as not null means we cant keep that field without any value.
3. Change man is comprehensive system designed to provide both reliable and streamlined implementation of software changes on the MVS system.

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  • Mar 3rd, 2016

1.2 bytes
2.Null Indicator is one statement to specify the value of null and not null ..three possible null indicator values
0 - not null which is zero
-1 - null
-2 - it can be any data
Example of using null indicator in db2:
3. Change man (cman) is the tool to stage and promote the components and used to implement it to production environment.

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