Multiple choice technology programming languages

Which one is not a type of VSAM file?

  1. KSDS

  2. ESDS

  3. RSDS

  4. RRDS
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To solve this question, the user needs to have knowledge about VSAM files and their types.

Now, let's go through each option and explain why it is right or wrong:

A. KSDS: This option is a type of VSAM file. KSDS stands for Key Sequenced Data Set and is used to store records in a sequential order based on a primary key.

B. ESDS: This option is a type of VSAM file. ESDS stands for Entry Sequenced Data Set and is used to store records in the order in which they are written to the file.

C. RSDS: This option is not a type of VSAM file. RSDS is not a valid acronym for a VSAM file type.

D. RRDS: This option is a type of VSAM file. RRDS stands for Relative Record Data Set and is used to store records based on relative byte positions within the file.

Therefore, the answer is: C

AI explanation

The real VSAM data set organizations are KSDS (Key-Sequenced), ESDS (Entry-Sequenced), RRDS (Relative Record), and LDS (Linear). 'RRDS' is a genuine VSAM type (Relative Record Data Set), while 'RSDS' is not a recognized VSAM organization at all — it doesn't correspond to any real IBM-documented VSAM file type. So RSDS is correctly identified as the one that is NOT a type of VSAM file, since KSDS, ESDS, and RRDS are all legitimate, well-documented VSAM organizations.

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