Multiple choice technology mainframe

READ PHYSICAL is less effecient then READ LOGICAL

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

READ PHYSICAL is actually MORE efficient than READ LOGICAL in Adabas. READ PHYSICAL accesses records directly by their ISN (Internal Sequence Number) without using the inverted list indexes. READ LOGICAL requires index lookups to find record ISNs first, making it slower for direct access.

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