It is __________ to reread a page from the file system than to write it to swap space and then to reread it from there.

• A. Useless
• B. Less efficient
• C. More efficient
• D. None of the mentioned

A large number of disks in a system improves the rate at which data can be read or written if ____________

• A. The disks are operated on sequentially
• B. The disks are operated on selectively
• C. The disks are operated in parallel
• D. All of the mentioned

RAID stands for ____________

• A. Redundant allocation of inexpensive disks
• B. Redundant array of important disks
• C. Redundant allocation of independent disks
• D. Redundant array of independent disks

If the mean time to failure of a single disk is 100,000 hours, then the mean time to failure of some disk in an array of 100 disks will be ____________

• A. 100 hours
• B. 10 days
• C. 10 hours
• D. 1000 hours

The solution to the problem of reliability is the introduction of __________

• A. Aging
• B. Scheduling
• C. Redundancy
• D. Disks

The technique of duplicating every disk is known as ____________

• A. Mirroring
• B. Shadowing
• C. Redundancy
• D. All of the mentioned

The mean time to failure of a mirrored disk depends on ____________ I) the mean time to failure of individual disks II) the mean time to repair

• A. Only i
• B. Only ii
• C. Both i and ii
• D. Neither i nor ii

RAID level _______ refers to disk mirroring.

• A. 0
• B. 1
• C. 2
• D. 3

RAID level ______ is also known as bit interleaved parity organisation.

• A. 0
• B. 1
• C. 2
• D. 3

A single parity bit can be used for ____________

• A. Detection
• B. Multiple error corrections
• C. Few error corrections
• D. All of the mentioned