What are the common cics service programs and explain their usage?

1023

How can we update a specific field in RPG?

1349

How to define a directory?

975

What is the disadvantage of dynamic generation of acb?

1001

Explain how can return codes be tested before execution of a job step?

1318

How can you use dynamic calls in cics?

1054

What is the meaning of a (new, catalog, keep) disposition mean?

1107

What does a rollback do in idms?

963

What is the purpose of rollback and commit?

1184

Can you define cemt?

1044

Explain the function of the cics translator?

1040

Mention the length of physical storage of the given data types of db2 – date, timestamp, time

1077

what is the purpose of data structure?

1734

Receive consists of buffer option in it. What is the significance of this option?

1043

SET is the ANSI standard for variable assignment, SELECT is not. SET can only assign one variable at a time, SELECT can make multiple assignments at once. If assigning from a query, SET can only assign a scalar value. If the query returns multiple values/rows then SET will raise an error. SELECT will assign one of the values to the variable and hide the fact that multiple values were returned (so you'd likely never know why something was going wrong elsewhere - have fun troubleshooting that one) When assigning from a query if there is no value returned then SET will assign NULL, where SELECT will not make the assignment at all (so the variable will not be changed from it's previous value) As far as speed differences - there are no direct differences between SET and SELECT. However SELECT's ability to make multiple assignments in one shot does give it a slight speed advantage over SET.

2668