City Guilds Model Questions Vol1 2022 Information Technology Question 4

Practice objective / multiple choice question 4 from the 2022 City Guilds Model Questions Vol1 Information Technology examination.

City Guilds Model Questions Vol1 2022 Information Technology Objective / Multiple Choice Hard Difficulty
Question 4 CITY_GUILDS_MODEL_QUESTIONS_VOL1 • 2022 • INFORMATION_TECHNOLOGY • objective

A company must back up a \(12\text{ TB}\) data set. Two RAID options are considered:\n\n- RAID 5 using 6 disks of equal size.\n- RAID 6 using 8 disks of equal size.\n\nEach disk costs the same. The system must tolerate at least two simultaneous disk failures without data loss and provide at least \(10\text{ TB}\) of usable storage. Determine the minimum disk capacity (in whole TB) required for each RAID level, and state which RAID level satisfies both requirements with the smallest total disk cost.

Answer Options

A. RAID 5 requires a minimum disk size of 2 TB, RAID 6 requires 3 TB. Only RAID 5 satisfies the two‑failure tolerance, using six 2 TB disks (total raw capacity 12 TB).
Correct Answer B. Both RAID levels require a minimum disk size of 2 TB. Only RAID 6 satisfies the two‑failure tolerance, using eight 2 TB disks (total raw capacity 16 TB).
C. Both RAID levels require a minimum disk size of 3 TB. Only RAID 5 satisfies the two‑failure tolerance, using six 3 TB disks (total raw capacity 18 TB).
D. Both RAID levels require a minimum disk size of 2 TB. Only RAID 6 satisfies the two‑failure tolerance, using eight 2 TB disks (total raw capacity 16 TB), but the usable storage is only 8 TB.
Correct Answer
B
Correct Option:
Both RAID levels require a minimum disk size of 2 TB. Only RAID 6 satisfies the two‑failure tolerance, using eight 2 TB disks (total raw capacity 16 TB).

About This Question

This is City Guilds Model Questions Vol1 2022 Information Technology Question 4. It is one of the objective questions from the 2022 City Guilds Model Questions Vol1 Information Technology examination.

Difficulty level: Hard .

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