Computer System Structures Interview Questions Part12

10) the memory hierarchy is
a. Registers, cache, main memory, magnetic disk, CDROM, tape
b. Cache, , main memo ry, magnetic disk, Registers, CDROM, tape
c. Cache, Registers, main memory, magnetic disk, CDROM, tape
4) Main memory, Registers, cache, magnetic disk, CDROM, tape
Answer: 1
Exp: internal architecture
Level:2


11) The CPU uses poling to watch the control bit, constantly looping to see whether the device is ready. This method of operations is called___________
1) Progrmmed I/O
2) I/O interrupt
3) I/O operation request
4) None
Answer: 1
Exp: by the definition of the Programmed I/O
Level:2

12) The memory buffer used to accommodate a speed differential is called a _____
1) Main memory
2) Cache memery
3) CPU Register
4) Optical disk
Answer: 2
Exp: by def
Level:1


13) The set of tracks that are at one arm position forms a ________
1) sector
2) cylinder
3) platter
4) Spindel
Answer: Cylinder
Exp: by def
Level:1


14) ____ is the rate at which data flow between the drive and the computer.
1) bit rate
2) transfer rate
3) data rate
4) None
Answer: Transfer rate
Exp: by def
Level:1
15) The positioning time is also called ___
a. Seek time
b. Rotational latency
c. Transfer rate
d. Random access time
Answer:4
Exp: ( by definition of random access time)
Level:1


16) Time to move the disc arm to the desired cylinder is called____
1) seek time
2) wait time
3) turn around time
4) None
Answer: Seek time
Exp: ( by definition of the seek time)
Level:1

17) The time for the desired sector to rotate to the disc head is called ____
1) seek time
2) rotational latency
3) sweep time
4) None
Answer: Rotational latency
Exp: ( by definition of rotational latency)
Level:1

18) Even though disc platters are coated with a thin protective layer, sometimes the head will damage the magnetic surface. This accident is called______
1) system crash
2) hardware crash
3) head crash
4) None
Answer: Head crash
Exp: by def
Level:1


19) EIDE stands for
1) Extended indexed directory extensions
2) Enhanced Integrated Drive Electronics
3) Enhanced Integrated Disk Electronics
4) None
Answer: 2
Exp: acronym
Level:2


20) Cache memory is divided into (and loaded in) blocks also called ________
a. Cache blocks
b. Cache lines
c. Both the above
d. None of the above
Answer: 2
Exp: by def
Level:1


21) Modem can convert
1) Digital data to analog signals
2) Analog signals to digital signals.
3) Both the above
4) 2 only
Answer: 3
Exp:n by def

Level:1

22) ______________is the rapid switching of the CPU between processes given the illusion of all processes running concurrently.
a. Multiprogramming
b. Multitasking
c. Timesharing
d. None
Answer: a and b
Exp: by def
Level:1

23) Which of the following instructions (or instruction sequences) should only be allowed in kernel mode?
1. Disable all interrupts.
2. Read the time of day clock.
3. Set the time of day clock.
4. Change the memory map.
5. Write to the hard disk controller register.
6. Write all buffered blocks associated with a file back to disk (fsync).
1) 1,3,4,5 need to be restricted to kernel mode.
2) 1, 6, 3, 2
3) 1, 2, 3, 4, 5
4) 3, 4, 1, 2
Answer: 1
Exp: properties of the kernel mode
Level:2