Computer Maintinance

Question 1: Where does a computer add and compare data?

a. Hard disk

b. Floppy disk

c. CPU chip

d. Memory chip

 Question 2: Which of the following registers is used to keep track of address of the memory location where the next instruction is located?

a. Memory Address Register

b. Memory Data Register

c. Instruction Register

d. Program Register

 Question 3: A complete microcomputer system consists of

a. microprocessor

b. memory

c. peripheral equipment

d. all of above

 Question 4: CPU does not perform the operation

a. data transfer

b. logic operation

c. arithmetic operation

d. all of above

Question 5: Pipelining strategy is called implement

a. instruction execution

b. instruction prefetch

c. instruction decoding

d. instruction manipulation

 Question 6: A stack is

a. an 8-bit register in the microprocessor

b. a 16-bit register in the microprocessor

c. a set of memory locations in R/WM reserved for storing information temporarily during the execution of computer

d. a 16-bit memory address stored in the program counter

 Question 7: A stack pointer is 

a. a 16-bit register in the microprocessor that indicate the beginning of the stack memory.

b. a register that decodes and executes 16-bit arithmetic expression.

c. The first memory location where a subroutine address is stored.

d. a register in which flag bits are stored

 Question 8: The branch logic that provides decision making capabilities in the control unit is known as

a. controlled transfer

b. conditional transfer

c. unconditional transfer

d. none of above

 Question 9: Interrupts which are initiated by an instruction are

a. internal

b. external

c. hardware

d. software

 Question 10: A time sharing system imply

a. more than one processor in the system

b. more than one program in memory

c. more than one memory in the system

d. None of above

Question 11: Processors of all computers, whether micro, mini or mainframe must have 

a. ALU

b. Primary Storage

c. Control unit

d. All of above

 Question 12: What is the control unit's function in the CPU?

a. To transfer data to primary storage

b. to store program instruction

c. to perform logic operations

d. to decode program instruction

 Question 13: What is meant by a dedicated computer?

a. which is used by one person only

b. which is assigned to one and only one task

c. which does one kind of software

d. which is meant for application software only

 Question 14: The most common addressing techiniques employed by a CPU is

a. immediate

b. direct

c. indirect

d. register

e. all of the above

 Question 15: Pipeline implement

a. fetch instruction

b. decode instruction

c. fetch operand

d. calculate operand

e. execute instruction

f. all of abve

Question 16: Which of the following code is used in present day computing was developed by IBM corporation?

a. ASCII

b. Hollerith Code

c. Baudot code

d. EBCDIC code

Question 17: When a subroutine is called, the address of the instruction following the CALL instructions stored in/on the

a. stack pointer

b. accumulator

c. program counter

d. stack

 Question 18: A microprogram written as string of 0's and 1's is a 

a. symbolic microinstruction

b. binary microinstruction

c. symbolic microprogram

d. binary microprogram

 Question 19: Interrupts which are initiated by  an instruction are

a. internal

b. external

c. hardware

d. software

 Question 20: Memory access in RISC architecture is limited to instructions

a. CALL and RET

b. PUSH and POP

c. STA and LDA

d. MOV and JMP

Question 21: A collection of 8 bits is called

a. byte

b. word

c. record

 Question 22: The ascending order or a data Hierarchy is 

a. bit - bytes - fields - record - file - database

b. bit - bytes - record - field - file - database

c. bytes - bit- field - record - file - database

d. bytes -bit - record - field - file - database

 Question 23: How many address lines are needed to address each memory locations in a 2048 x 4 memory chip?

a. 10

b. 11

c. 8

d. 12 

 Question 24: A computer program that converts an entire program into machine language at one time is called a/an

a. interpreter

b. simulator

c. compiler

d. commander 

 Question 25: In immediate addressing the operand is placed

a. in the CPU register

b. after OP code in the instruction

c. in memory

d. in stack 

 Question 26: Microprocessor 8085 can address location upto 

a. 32K

b. 128K

c. 64K

d. 1M

 Question 27: The ALU and control unit of most of the microcomputers are combined and manufacture on a single silicon chip. What is it called?

a. monochip

b. microprocessor

c. ALU

d. control unit 

 Question 28: When the RET instruction at the end of subroutine is executed,

a. the information where the stack is iniatialized is transferred to the stack pointer

b. the memory address of the RET instruction is transferred to the program counter

c. two data bytes stored in the top two locations of the stack are transferred to the program counter

d. two data bytes stored in the top two locations of the stack are transferred to the stack pointer

 Question 29: A microporgram is sequencer perform the operation  

a. read

b. write

c. execute

d. read and write

e. read and execute

 Question 30: Interrupts which are initiated by an I/O drive are

a. internal

b. external

c. software

d. all of above 

 Question 31: In OSI network architecture, the dialogue control and token management are responsibility of

a. session layer

b. network layer

c. transport layer

d. data link layer

e. none of above

 Question 32: In OSI network architecture, the routing is performed by

a. network layer

b. data link layer

c. transport layer

d. session layer

e. none of above

Question 33: Which of the following performs modulation and demodulation?

a. fiber optics

b. satellite

c. coaxial cable

d. modem

e. none of the above

 Question 34: The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as:

a. modulation

b. demodulation

c. synchronizing

d. digitising

 Question 35: How many OSI layers are covered in the X.25 standard?

a. Two

b. Three

c. Seven

d. Six

e. None of above

 Question 36: Layer one of the OSI model is

a. physical layer

b. link layer

c. transport layer

d. network layer

e. none of above

 Question 37: The x.25 standard specifies a 

a. technique for start-stop data

b. technique for dial access

c. DTE/DCE interface

d. data bit rate

e. none of above

 Question 38: Which of the following communication modes support two-way traffic but in only one direction at a time?

a. simplex

b. half duplex

c. three-quarters duplex

d. all of the above

e. none of the above

 Question 39: Which of the following might be used by a company to satisfy its growing communications needs?

a. front end processor

b. multiplexer

c. controller

d. concentrator

e. all of the above

 Question 40: What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?

a. 4

b. 2

c. 6

d. 3

ANSWERS:

1. c      2. d     3. d     4. a   5. b     6. c   7. a   8. c    9. d   10. b

11. d      12. d     13. b     14. e      15. f      16. d     17. d     18. d     19. d    20. c

21. a      22. a     23. b     24. c      25.b      26.c      27.b      28.c      29.e     30.b 

31. a    32. a   33. d     34. d     35. b     36. a     37. c    38. b   39. e    40. d