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Q:

What is the difference between the INTO and the SET option in the EXEC CICS RECEIVE MAP command?

Answer

The INTO option moves the information in the TIOA into the reserved specified area, while the SET option simply returns the address of the TIOA to the specified BLL cell or address of a linkage-section.


 

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Subject: Mainframe Interview

Q:

What are the CICS commands available for program control?

Answer

The following commands are available for the Program Control services:


LINK: To pass control to another program at the lower level, expecting to be returned. XCTL: To pass control to another program at the same level, not expecting to be returned.


RETURN:  To return to the next higher-level program or CICS. 


LOAD: To load a program. 


RELEASE: To release a program.

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Q:

What happens when a CICS command contains the NOHANDLE option?

Answer

- 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.

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Q:

What CICS command are used to read a VSAM KSDS sequentially in ascending order?

Answer

READNEXT reads the next record from a browse operation for any of the three VSAM files.

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Subject: Mainframe Interview

Q:

In a DB2-CICS program which acts as co-ordinator and which is the participant?

Answer

DB2 acts as the participant and CICS acts as a co-ordinator


 

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Subject: Mainframe Interview

Q:

File contains 5 records say D,E,F,C,A-I want to copy D and A records only by using file-aid?

Answer

Go to file-aid copy option.Enter the from dataset to be copied and to dataset to which you want to copy.go to options. Enter 0 at Initial records to skip field.Then enter 3 at the no of records to skip field and 1 to no of records to select.press enter and PF3.

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Subject: Mainframe Interview

Q:

Name and explain the type of locks?

Answer

There are three types of lock, namely:


Shared – This type of lock permits two or more programs to read from the locked space but does not allow them to change it.


Update – This lock is more lenient. It permits the program to read and change the locked space.


Exclusive – This lock restricts all users from accessing the locked space.

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Q:

What is the difference between Cursor Stability and Repeatable Read isolation levels?

Answer

CURSOR STABILITY:


- CS is a row level locking


- Acquires an exclusive lock on the row that is to be updated


- When the control is moved to the next updatable row, the lock is released


REPEATABLE READ:


- RR is a page level locking


- Acquires an exclusive lock on the entire page which is the source of row availability


- When the control is moved to the next updatable page the lock is released

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Subject: Mainframe Interview