Quiznetik

Digital Principles and System Design | Set 3

1. When both inputs of SR latches are high, the latch goes

Correct : C. metastable

2. The register is a type of

Correct : A. sequential circuit

3. How many types of registers are?

Correct : C. 4

4. The main difference between a register and a counter is

Correct : A. a register has no specific sequence of states

5. In serial shifting method, data shifting occurs

Correct : B. unidirectional shift register

6. A register that is used to store binary information is called

Correct : B. binary register

7. A shift register is defined as

Correct : B. the register capable of shifting information either to the right or to the left

8. In digital logic, a counter is a device which

Correct : B. stores the number of times a particular event or process has occurred

9. A counter circuit is usually constructed of

Correct : C. a number of flip-flops connected in cascade

10. 4 COUNTERS

Correct : C. 0 to 2n – 1

11. How many types of the counter are there?

Correct : B. 3

12. A decimal counter has              states.

Correct : B. 10

13. Ripple counters are also called

Correct : B. asynchronous counters

14. Synchronous counter is a type of

Correct : C. msi counters

15. Three decade counter would have

Correct : B. 3 bcd counters

16. BCD counter is also known as

Correct : B. decade counter

17. The parallel outputs of a counter circuit represent the

Correct : D. clock count

18. A sequential logic can’t be executed by concurrent statements only.

Correct : A. true

19. Which of the following sequential circuit doesn’t need a clock signal?

Correct : D. latch

20. The following timing diagram shows              flip flop.

Correct : B. d flip-flop

21. The process used for implementation of sequential logic in VHDL is called              process.

Correct : C. clocked process

22. Why do we need to define clock signal in the sensitivity list of the process?

Correct : A. to trigger the statement as soon as there is some event on clock

23. A user has designed JK flip flop by using the VHDL code. The output is continuously switching between 0 and 1. This condition is known as

Correct : C. race around condition

24. Which of the following method is not used to remove the race around condition in a flip flop?

Correct : A. using level triggered flip flop

25. Which of the following attribute is generally used in implementation of sequential circuits?

Correct : D. ‘event

26. Which of the following line is correct for detecting positive edge of a clock?

Correct : B. if (clk’event and clk = ‘1’)

27. A user doesn’t want to use the IF statement for detecting clock edge. It is possible to do the same by using any other keyword in VHDL.

Correct : A. true

28. Sequential circuits are represented as

Correct : A. finite state machine

29. Sequential circuit includes

Correct : D. delays and feedback from output to input

30. Which constitutes the test vectors in sequential circuits?

Correct : A. feedback variables

31. Outputs are functions of

Correct : A. present state

32. Which is the delay elements for clocked system?

Correct : C. flip-flops

33. Which contributes to the necessary delay element?

Correct : B. circuit propagation elements

34. In an OR gate, if A and B are two inputs and there is struck at 1 fault in B path, then output will be

Correct : C. 1

35. Iterative test generation method suits for circuits with

Correct : B. few feedback loops

36. Which method is very time consuming?

Correct : B. iterative test generation

37. In this iterative test generation method, sequential logic is

Correct : C. converted to combinational logic

38. For a NAND gate, struck-at 1 fault in second input line cannot be detected if

Correct : B. q is 0

39. Any condition that causes a processor to stall is called as

Correct : A. hazard

40. In this technique, a simple fault manifests into multiple N faults.

Correct : A. true

41. The contention for the usage of a hardware device is called

Correct : A. structural hazard

42. The situation wherein the data of operands are not available is called

Correct : A. data hazard

43. The stalling of the processor due to the unavailability of the instructions is called as

Correct : A. control hazard

44. The time lost due to the branch instruction is often referred to as

Correct : C. branch penalty

45. method is used in centralized systems to perform out of order execution.

Correct : B. score boarding

46. The algorithm followed in most of the systems to perform out of order execution is

Correct : A. tomasulo algorithm

47. What are the typical values of tOE?

Correct : D. all of the mentioned

48. Which of the following is not a type of memory?

Correct : C. eeprom

49. The chip by which both the operation of read and write is performed

Correct : A. ram

50. RAM is also known as

Correct : A. rwm

51. If a RAM chip has n address input lines then it can access memory locations upto

Correct : C. 2n

52. The n-bit address is placed in the

Correct : B. mar

53. Which of the following control signals are selected for read and write operations in a RAM?

Correct : C. read and write

54. Computers invariably use RAM for

Correct : C. high speed main memory

55. How many types of RAMs are?

Correct : A. 2

56. Static RAM employs

Correct : D. bjt or mos

57. Dynamic RAM employs

Correct : A. capacitor or mosfet

58. Which one of the following is volatile in nature?

Correct : D. ram

59. The magnetic core memories have been replaced by semiconductor RAMs, why?

Correct : D. all of the mentioned

60. The data written in flip-flop remains stored as long as

Correct : A. d.c. power is supplied

61. Memory is a/an

Correct : C. indispensable part of computer

62. The instruction used in a program for executing them is stored in the

Correct : C. memory

63. A register is able to hold

Correct : B. word

64. A register file holds

Correct : D. a modest number of words of information

65. The very first computer memory consisted of

Correct : B. a large memory storage equipment

66. A minute magnetic toroid is also called as

Correct : C. core memory

67. Which one of the following has capability to store data in extremely high densities?

Correct : C. semiconductor

68. A large memory is compressed into a small one by using

Correct : B. vlsi semiconductor

69. VLSI chip utilizes

Correct : D. all of the mentioned

70. CD-ROM refers to

Correct : B. compact disk-read only memory

71. Data stored in an electronic memory cell can be accessed at random and on demand using

Correct : B. direct addressing

72. The full form of PLD is

Correct : C. programmable logic device

73. The evolution of PLD began with

Correct : A. erom

74. A ROM is defined as

Correct : C. read only memory

75. In layering, n layers provide service to

Correct : C. n+1 layer

76. Which can be used as an intermediate device in between transmitter entity and receiver entity?

Correct : D. all of the mentioned

77. Which has comparatively high frequency component?

Correct : C. square wave

78. Which has continuous transmission?

Correct : B. synchronous

79. Which requires bit transitions?

Correct : B. synchronous

80. In synchronous transmission, receiver must stay synchronous for

Correct : C. 9 bits

81. Which is more efficient?

Correct : B. cyclic redundancy check

82. Which can detect two bit errors?

Correct : B. cyclic redundancy check

83. CRC uses

Correct : C. multiplication & binary division

84. Which of the following has the capability to store the information permanently?

Correct : B. rom

85. ROM has the capability to perform

Correct : B. read operation only

86. Since, ROM has the capability to read the information only then also it has been designed, why?

Correct : C. for booting purpose

87. The ROM is a

Correct : B. combinational circuit

88. ROM is made up of

Correct : C. decoder and or gates

89. In ROM, each bit is a combination of the address variables is called

Correct : D. address

90. What is memory decoding?

Correct : B. the process of memory ic used in a digital system is selected for the range of address assigned

91. Which is not a removable drive?

Correct : C. super disk

92. In ROM, each bit combination that comes out of the output lines is called

Correct : C. data word

93. VLSI chip utilizes

Correct : D. all of the mentioned

94. How many address bits are required to select memory location in Memory decoder?

Correct : C. 12 kb

95. How memory expansion is done?

Correct : C. by connecting memory ics together

96. IC 4116 is organised as

Correct : C. 32 * 4

97. PLD contains a large number of

Correct : D. all of the mentioned

98. How many 1024 * 1 RAM chips are required to construct a 1024 * 8 memory system?

Correct : C. 8

99. How many 16K * 4 RAMs are required to achieve a memory with a capacity of 64K and a word length of 8 bits?

Correct : D. 8

100. Why antifuses are implemented in a PLD?

Correct : C. to implement the programmes