Multiple choice technology mainframe

In which mode must you open a file to update the records in the file?

  1. Input

  2. Output

  3. Extended

  4. I-O
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

I-O mode in COBOL allows both reading and updating records in a file, which is required when you need to modify existing records. Input mode only permits reading, Output mode creates new files, and Extended is not a standard file open mode in COBOL.

Keep practicing — related questions