CS 162, Fall 1992
Midterm 1
Professor A. Smith
Problem #1
Explain the difference between a process and a thread. (10 points)
Problem #2
This question is multiple choice. Please place your answers at the bottom.(22 points)
i. A typical rotation time for a magnetic disk is:
A)1.5 ms B)15 ms C)15 microsec. D)5 ms
ii. A typical transfer rate for high performance reel to reel tape is:
A)100KB/sec. B)500KB/sec. C)1.25KB/sec. D)4MB/sec.
iii. The width of an interrecord gap on reel to reel magnetic tape is approximately:
A) 0.1 inch B) 0.6 inch C) 1.1 inches D) 3 inches E) 0.01 inch
iv. The read/write speed of an Exabyte tape is approximately:
A) 10KB/sec. B) 50KB/sec. C) 200KB/sec. D) 1MB/sec. E) 5MB/sec.
v. A typical average seek time for a magnetic disk is:
A) 1usec B) 15usec C) 1ms. D) 15ms.
vi. The maximum storage capacity of an IBM type cartridge tape is approximately:
A) 10MB. B) 50MB. C) 200MB D) 1GB E) 5GB F) 10GB
vii. Writing a read/write optical disk takes X as long as reading it:
A) the same: B) twice C) half D) ten times
viii. The record size for a line printer is:
A) 80 bytes B) 120 bytes C) 132 bytes D) 144 bytes E) 212 bytes.
ix. A typical number of tracks per inch on the surface of a platter for a magnetic disk is:
A) 10 B) 100 C) 1000 D) 10000 E) 100000
x. A typical tape speed for a high performance tape drive using reel to reel tape is:
A) 7.5ips B) 50ips. C) 200ips. D) 500ips.
xi. The ratio of the capacity of a DAT tape to a 12'' reel to reel tape recorded at 1600bpi with maximum block
size is roughly:
A) 0.1 B) 1.0 C) 5.0 D) 10.0 E) 20.0 F) 50.0 G) 100.0
CS 162, Midterm 1, Fall 1992
CS 162, Fall 1992course, semester/yearexam # Midterm 1 Professor A. Smithprofessor (e.g., Professor J. Wawrzynek)1
