IBM MainFrame Interview Question:

File1 has 100 records and file2 has 200 records i want to copy 50 records which r in both file into file3?

Submitted by: Administrator

First need to sort both files
READ FILE1
READ FILE2
PERFORM UNTIL EOF = 'Y'
IF FILE1-ID > FILE2-ID THEN
READ FILE2 AT END MOVE 'Y' TO EOF
ELSE IF FILE1-ID < FILE2-ID
READ FILE1 AT END MOVE 'Y' TO EOF
ELSE IF FILE1-ID = FILE2-ID
WRITE FILE3
READ FILE1 AT END MOVE 'Y' TO EOF
READ FILE2 AT END MOVE 'Y' TO EOF
END-PERFORM
Submitted by: Administrator