Neco 2024 Data Processing Question 38

Practice objective / multiple choice question 38 from the 2024 Neco Data Processing examination.

Neco 2024 Data Processing Objective / Multiple Choice Medium Difficulty
Question 38 NECO • 2024 • DATA_PROCESSING • objective

A file contains 10\,000 records, each 100\,bytes long. The disk block size is 1\,024\,bytes. An indexed‑sequential file uses a primary index whose entry size is 12\,bytes. Disk parameters are: seek time 5\,ms, rotational latency 4\,ms, and transfer time per block 0.1\,ms. (i) How many data blocks are required? (ii) How many index blocks are needed assuming a two‑level index? (iii) Estimate the average time to locate a record.

Answer Options

A. Data blocks: 1,000; Index blocks (two‑level): 15; Average record‑access time ≈ 30.1 ms
B. Data blocks: 1,024; Index blocks (two‑level): 12; Average record‑access time ≈ 28.5 ms
Correct Answer C. Data blocks: 1,000; Index blocks (two‑level): 13; Average record‑access time ≈ 27.3 ms
D. Data blocks: 980; Index blocks (two‑level): 14; Average record‑access time ≈ 26.0 ms
Correct Answer
C
Correct Option:
Data blocks: 1,000; Index blocks (two‑level): 13; Average record‑access time ≈ 27.3 ms

About This Question

This is Neco 2024 Data Processing Question 38. It is one of the objective questions from the 2024 Neco Data Processing examination.

Difficulty level: Medium .

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