OS Mass-Storage Structures
In the _______ algorithm, the disk head moves from one end to the other, servicing requests along the way. When the head reaches the other end, it immediately returns to the beginning of the disk without servicing any requests on the return trip.
LOOK
SCAN
C-SCAN
C-LOOK
C-SCAN
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RAID level ____ spreads parity and data among all N+1 disks rather than storing data in N disks and parity in 1.A. 3
B. 4
C. 5
D. 6
Using swap space significantly _________ system performance.
A. increases
B. decreases
C. maintains
D. does not affect
The _______ program initializes all aspects of the system, from CPU registers to device controllers and the contents of main memory, and then starts the operating system.
A. main
B. bootloader
C. bootstrap
D. rom
An unrecoverable error is known as _________
A. hard error
B. tough error
C. soft error
D. none of the mentioned
A process is moved to wait queue when I/O request is made with ____________
A. non-blocking I/O
B. blocking I/O
C. asynchronous I/O
D. synchronous I/O
Virtual memory uses disk space as an extension of _________
A. secondary storage
B. main memory
C. tertiary storage
D. none of the mentioned
WORM stands for:
A. write only, read mandatory
B. write once, read many times
C. write only once, read multiple
D. none of the mentioned
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