Mainframe Interview Questions

To insert a NULL, move -1 to the null indicator

To insert a valid value, move 0 to the null indicator

Supply the DD cards just as you would for files referred to in the main program.

- Use a COBOL II CALL statement to invoke a subprogram. This method is transparent to CICS, which sees only the one load module. 

- EXEC LINK is similar to a call; it invokes a separate CICS program and ends with a RETURN to the invoking program

- EXEC XCTL which transfers control to another CICS program and does not get control 

back. 

COBOL II allows for static calls which are more efficient than the LINK instruction which establishes a new run-unit. 

An application plan or package is generated by the bind to define an access path. 

1. Based on the lock-size given while creating the table space

2. Programer can direct the DB2 what lock-size to use

3. If lock - size ANY is specified, DB2 usually chooses a lock-size of PAGE

- NOHANDLE is an option that can be specified along with abnormal condition during program execution.

- When the exception occurs, no action is performed during execution of NOHANDLE command.

- The abnormal condition is ignored, even the EXEC CICS HANDLE condition exist.

- The abnormal condition is also ignored when EXEC CICS IGNORE condition is tested.

- The previous HANDLE CONDITION for other commands will not be effected with NOHANDLE option.

An OOK-Rec is a one of a kind record set, used to get to another record set.

IDENTIFICATION DIVISION and PROGRAM-ID paragraph are mandatory for a compilation error free COBOL program.