Please answer the quetions and some answers maybe have more than one answer : Qu

Question

Please answer the quetions and some answers maybe have more than one answer :

Question 52 : An algorithm is best described as

A. A computer language
B. A step by step procedure for solving a problem
C. A branch of mathematics
D. All of the above
E. None of the above

Question 52 options:

B

A and C

D

E

Question 53 : Trojan-Horse programs

A. are legitimate programs that allow unauthorized access
B. do not usually work
C. are hidden programs that do not show up on the system
D. usually are immediately discovered
E. None of the above

Question 53 options:

A

B and D

A and C

E

Question 54 : The CPU, after receiving an interrupt from an I/O device

A. halts for a predetermined time
B. hands over control of address bus and data bus to the interrupting device
C. branches off to the interrupt service routine immediately
D. branches off to the interrupt service routine after completion of the current instruction
E. None of the above

Question 54 options:

C

A and B

E

D

Question 55

What is the name of the technique in which the operating system of a computer executes several programs concurrently by switching back and forth between them?

A. Partitioning
B. Multitasking
C. Windowing
D. Paging
E. None of the above

Question 55 options:

B

A and C

E

D

Question 56 : The dispatcher

A. actually schedules the tasks into the processor
B. puts tasks in I/O wait
C. is always small and simple
D. never changes task priorities
E. None of the above

Question 56 options:

E

B and C

A

D

B

A and C

D

E

Explanation / Answer

52 B

53 A

54 C

55 B

56 A

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