计算机导论-第5章-计算机组成

Chapter 5 Computer Organization

Knowledge point:

5.1. three subsystems that make up a computer

5.2. functionality of each subsystem

5.3. memory addressing and calculating the number of bytes

5.4. addressing system for input/output devices.

5.5. the systems used to connect different components together.

Multiple-choice Questions

39. The ___ is a computer subsystem that performs operations on data.( Knowledge point 5.1)

a. CPU

b. memory

c. I/O hardware

d. none of the above

40. ____ is a stand-alone storage location that holds data temporarily. ( Knowledge point 5.1)

a. An ALU

b. A register

c. A control unit

d. A tape drive

41. ____ is a unit that can add two inputs. ( Knowledge point 5.2)

a. An ALU

b. A register

c. A control unit

d. A tape drive

42. A register in a CPU can hold ____.( Knowledge point 5.2)

a. data

b. instructions

c. program counter values

d.all of the above

43. A control unit with five wires can define up to ____ operations. ( Knowledge point 5.2)

a. 5

b. 10

c. 16

d. 32

44. A word is ____ bits. ( Knowledge point 5.3)

a. 8

b. 16

c. 32

d. any of the above

45. If the memory address space is 16 MB and the word size is 8 bits, then ____ bits are needed to access each word. ( Knowledge point 5.3)

a. 8

b. 16

c. 24

d.32

46. The data in ____ are erased if the computer is powered down. ( Knowledge point

5.5.3)

a. RAM

b. ROM

c. a tape drive

d. a CD-ROM

47. ____ is a memory type with capacitors that need to be refreshed periodically. ( Knowledge point 5.3)

a. SRAM

b. DRAM

c. ROM

d. all of the above

48. ____ is a memory type with traditional flip-flop gates to hold data. ( Knowledge point 5.3)

a. SRAM

b. DRAM

c. ROM

d. all of the above

49. There are ____ bytes in 16 terabytes. ( Knowledge point 5.3)

a.

b.

c.

d.

50. ____ can be programmed and erased using electronic impulses but can remain in

a computer during erasure. ( Knowledge point 5.3)

a. ROM

b. PROM

c. EPROM

d. EEPROM

51. ____ is a type of memory in which the user, not the manufacturer, stores

programs that cannot be overwritten. ( Knowledge point 5.3)

a. ROM

c. EPROM

d. EEPROM

52. CPU registers should have ____ speed memory. ( Knowledge point 5.3)

a. high

b. medium

c. low

d. any of the above

53. Main memory in a computer usually consists of large amounts of ____ speed

memory. ( Knowledge point 5.3)

a. high

b. medium

c. low

d. any of the above

54. The ____ memory contains a copy of a portion of main memory. ( Knowledge point 5.3)

a. CPU

b. cache

c. main

d. ROM

55. The ____ is nonstorage I/O device. ( Knowledge point 5.4)

a. keyword

b. monitor

c. printer

d. all of the above

56.A ____ is an optical storage device. ( Knowledge point 5.4)

a. CD-ROM

b. CD-R

c. CD-RM

d. all of the above

57. The ____ is a storage device in which the manufacturer writes information to the disc. ( Knowledge point 5.4)

a. CD-ROM

b. CD-R

c. CD-RM

d. all of the above

58. The ____ is a storage device in which the user can writes information only once

to the disc. ( Knowledge point 5.4)

a. CD-ROM

b. CD-R

c. CD-RM

d. all of the above

59. The ____ is a storage device that can undergo multiple writings and erasings. ( Knowledge point 5.4)