Multiple choice technology mainframe

The format of an I/O area with control characters for the variable length record is

  1. the data begins in byte 1

  2. byte 0 and byte 1 contains 2 byte length field

  3. byte 0 contains control character and byte 1 and 2 contains the length field

  4. byte 0 and 1 contains the 2 byte length field and byte 3 contains control character
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

For variable-length records in I/O areas, bytes 0-1 contain a 2-byte length field, and byte 3 contains a control character. This format allows the system to determine record boundaries and handle variable-sized records correctly.

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