Multiple choice technology mainframe

What is the indicator for no block attached type.

  1. 0

  2. 1

  3. 21

  4. 31
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In TPF data levels, a block type indicator of X'0001' (value 1) specifically represents that no block is attached to the Core Block Reference Word (CBRW). Value 0 is not used for this state, while values 21 (X'0021') and 31 (X'0031') indicate attached L1 and L2 blocks respectively.

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