Quiznetik

Computer Architecture | Set 4

1. constitute the representation of the floating number.

Correct : D. all of the mentioned

2. The sign followed by the string of digits is called as

Correct : C. mantissa

3. The normalized representation of 0.0010110 * 2 9 is

Correct : B. 0 10000101 0110

4. The 32 bit representation of the decimal number is called as

Correct : B. single-precision

5. In 32 bit representation the scale factor as a range of

Correct : A. -128 to 127

6. In double precision format, the size of the mantissa is

Correct : B. 52 bit

7. have been developed specifically for pipelined systems.

Correct : C. optimizing compilers

8. The pipelining process is also called as

Correct : B. assembly line operation

9. To increase the speed of memory access in pipelining, we make use of

Correct : B. clock

10. Each stage in pipelining should be completed within                         cycle.

Correct : A. 1

11. In pipelining the task which requires the least time is performed first.

Correct : B. false

12. If a unit completes its task before the allotted time period, then

Correct : C. cache

13. The periods of time when the unit is idle is called as

Correct : D. both stalls and bubbles

14. The throughput of a super scalar processor is

Correct : C. more than 1

15. When the processor executes multiple instructions at a time it is said to use

Correct : D. multiple issues

16. The               plays a very vital role in case of super scalar processors.

Correct : A. compilers

17. If an exception is raised and the succeeding instructions are executed completely, then the processor is said to have

Correct : B. imprecise exceptions

18. In super-scalar mode, all the similar instructions are grouped and executed together.

Correct : A. true

19. Since it uses the out of order mode of execution, the results are stored in

Correct : C. temporary registers

20. The step where in the results stored in the temporary register is transferred into the permanent register is called as

Correct : B. commitment step

21. A special unit used to govern the out of order execution of the instructions is called as

Correct : A. commitment unit

22. The commitment unit uses a queue called

Correct : A. record buffer

23. The CISC stands for

Correct : D. complex instruction set computer

24. The computer architecture aimed at reducing the time of execution of instructions is

Correct : B. risc

25. The Sun micro systems processors usually follow            architecture.

Correct : D. risc

26. The RISC processor has a more complicated design than CISC.

Correct : B. false

27. The iconic feature of the RISC machine among the following is

Correct : C. having a branch delay slot

28. Both the CISC and RISC architectures have been developed to reduce the

Correct : C. semantic gap

29. Pipe-lining is a unique feature of

Correct : A. risc

30. In CISC architecture most of the complex instructions are stored in

Correct : D. transistors

31. Which of the architecture is power efficient?

Correct : B. risc

32. For converting a virtual address into the physical address, the programs are divided into

Correct : A. pages

33. The memory allocated to each page is contiguous.

Correct : A. true

34. The pages size shouldn’t be too small, as this would lead to

Correct : C. increase in access time

35. The cache bridges the speed gap between               and

Correct : C. processor and ram

36. The virtual memory bridges the size and speed gap between                       and

Correct : B. ram and secondary memory

37. The higher order bits of the virtual address generated by the processor forms the

Correct : D. page number

38. The page length shouldn’t be too long because

Correct : C. it leads to wastage of memory

39. The lower order bits of the virtual address forms the

Correct : D. offset

40. The area in the main memory that can hold one page is called as

Correct : B. page frame

41. The starting address of the page table is stored in

Correct : C. page table base register

42. The bits used to indicate the status of the page in the memory is called

Correct : A. control bits

43. The                 bit is used to indicate the validity of the page.

Correct : A. valid bit

44. The bit used to store whether the page has been modified or not is called as

Correct : A. dirty bit

45. The page table should be ideally situated within

Correct : C. mmu

46. If the page table is large then it is stored in

Correct : B. main memory

47. When the page table is placed in the main memory, the                         is used to store the recently accessed pages.

Correct : B. tlb

48. The TLB is incorporated as part of the

Correct : B. mmu

49. Whenever a request to the page that is not present in the main memory is accessed               is triggered.

Correct : C. page fault

50. What does the RUN signal do?

Correct : D. it increments the step counter by one

51. register is designated to point to the 68000 processor stack.

Correct : A. a7 register

52. The word length in the 68000 computer is

Correct : C. 16 bit

53. Is 68000 computer Byte addressable?

Correct : A. true

54. The register in 68000 can contain up to            bits.

Correct : B. 32

55. The 68000 has a max of how many data registers?

Correct : D. 8

56. When an operand is stored in a register it is

Correct : A. stored in the lower order bits of the register

57. The 68000 uses            address assignment.

Correct : A. big endian

58. The addresses generated by the 68000 is            bit.

Correct : C. 24

59. Instructions which can handle any type of addressing mode are said to be

Correct : B. orthogonal

60. The instructions in 68000 can deal with operands of three different sizes.

Correct : A. true

61. The Branch instruction in 68000 provides how many types of offsets?

Correct : D. 2

62. The 68000 uses                           method to access I/O devices buffers.

Correct : A. memory mapped

63. instruction is used to set up a frame pointer for the subroutines in 68000.

Correct : B. link

64. The LINK instruction is always followed by                           instruction.

Correct : D. movem

65. ARM stands for

Correct : B. advanced risc machines

66. The main importance of ARM micro- processors is providing operation with

Correct : A. low cost and low power consumption

67. ARM processors where basically designed for

Correct : C. mobile systems

68. The ARM processors don’t support Byte addressability.

Correct : B. false

69. The address space in ARM is

Correct : D. 232

70. The address system supported by ARM systems is/are

Correct : D. both little & big endian

71. RISC stands for

Correct : C. reduced instruction set computer

72. In the ARM, PC is implemented using

Correct : C. general purpose register

73. The additional duplicate register used in ARM machines are called as

Correct : B. banked registers

74. The banked registers are used for

Correct : A. switching between supervisor and interrupt mode

75. Each instruction in ARM machines is encoded into                       Word.

Correct : C. 4 byte

76. All instructions in ARM are conditionally executed.

Correct : A. true

77. The addressing mode where the EA of the operand is the contents of Rn is

Correct : C. post-indexed mode

78. The effective address of the instruction written in Post-indexed mode, MOVE[Rn]+Rm is

Correct : A. ea = [rn]

79. symbol is used to signify write back mode.

Correct : D. !

80. The instruction, MLA R0,R1,R2,R3 performs

Correct : C. r0<-[r1]*[r2]+[r3]

81. instruction is used to get the 1’s complement of the operand.

Correct : D. mvn

82. The offset used in the conditional branching is                       bit.

Correct : A. 24

83. The condition to check whether the branch should happen or not is given by

Correct : B. the higher order 4 bits of the instruction

84. directive is used to indicate the beginning of the program instruction or data.

Correct : C. area

85. directive specifies the start of the execution.

Correct : B. entry

86. directives are used to initialize operands.

Correct : D. dcd

87. directive is used to name the register used for execution of an instruction.

Correct : B. rn

88. The pseudo instruction used to load an address into the register is

Correct : B. adr

89. The size of the floating registers can be extended upto

Correct : C. 80 bit

90. The floating point numbers are stored in general purpose register in IA-32.

Correct : B. false

91. The PC is incorporated with the help of general purpose registers.

Correct : B. false

92. IOPL stands for

Correct : A. input/output privilege level

93. In IA-32 architecture along with the general flags, the other conditional flags provided are

Correct : D. all of the mentioned

94. The register used to serve as PC is called as

Correct : B. instruction pointer

95. The IA-32 processor can switch between 16 bit operation and 32 bit operation with the help of instruction prefix bit.

Correct : A. true

96. The Bit extension of the register is denoted with the help of                        symbol.

Correct : C. e

97. The instruction, ADD R1, R2, R3 is decoded as

Correct : D. r1<-[r2]+[r3]

98. The instruction JG loop does

Correct : B. jumps to the memory location loop if the result of the most recent arithmetic op is greater than 0

99. The LEA mnemonic is used to

Correct : A. load the effective address of an instruction

100. The instructions of IA-32 machines are of length up to

Correct : D. 12 bytes