5. The first step of analysis procedure of SR latch is to
Correct : B. label outputs
6. The inputs of SR latch are
Correct : C. s and r
7. When a high is applied to the Set line of an SR latch, then
Correct : A. q output goes high
8. When both inputs of SR latches are low, the latch
Correct : C. it remains in its previously set or reset state
9. When both inputs of SR latches are high, the latch goes
Correct : C. metastable
10. Which of the following logic families has the highest maximum clock frequency?
Correct : B. as-ttl
11. Why is the fan-out of CMOS gates frequency dependent?
Correct : D. the input gates of the fets are predominantly capacitive and as the signal frequency increases the capacitive loading also increases thereby limiting the number of loads that may be attached to the output of the driving gate
12. Logic circuits that are designated as buffers, drivers or buffers/drivers are designed to have:
Correct : A. a greater current/voltage capability than an ordinary logic circuit
13. Which of the following will not normally be found on a data sheet?
Correct : C. minimum low level output voltage
14. Which of the following logic families has the shortest propagation delay?
Correct : B. as-ttl
15. What is the static charge that can be stored by your body as you walk across a carpet?
Correct : D. over 30000 volts
16. What must be done to interface TTL to CMOS?
Correct : D. a pull-up resistor must be used between the ttl output-cmos input node and vcc; the value of rp will depend on the number of cmos gates connected to the node
17. What causes low-power Schottky TTL to use less power than the 74XX series TTL?
Correct : B. a larger value resistor
18. What are the major differences between the 5400 and 7400 series of ICs?
Correct : B. the 5400 series are military grade and allow for a wider range of supply voltages and temperatures
19. 3 CYCLES AND RACES, STATE REDUCTION
Correct : C. 3
20. Memory is a/an
Correct : C. indispensable part of computer
21. The instruction used in a program for executing them is stored in the
Correct : C. memory
22. A register file holds
Correct : D. a modest number of words of information
23. The very first computer memory consisted of
Correct : B. a large memory storage equipment
24. A flip flop stores
Correct : B. 1 bit of information
25. Which one of the following has capability to store data in extremely high densities?
Correct : C. semiconductor
26. A large memory is compressed into a small one by using
Correct : B. vlsi semiconductor
27. The full form of PLD is
Correct : C. programmable logic device
28. VLSI chip utilizes
Correct : D. all of the mentioned
29. CD-ROM refers to
Correct : B. compact disk-read only memory
30. Data stored in an electronic memory cell can be accessed at random and on demand
Correct : A. erom
31. A ROM is defined as
Correct : C. read only memory
32. Which of the following has the capability to store the information permanently?
Correct : B. rom
33. ROM has the capability to perform
Correct : B. read operation only
34. Since, ROM has the capability to read the information only then also it has been designed, why?
Correct : C. for booting purpose
35. The ROM is a
Correct : B. combinational circuit
36. ROM is made up of
Correct : C. decoder and or gates
37. Why are ROMs called non-volatile memory?
Correct : B. they do not lose memory when power is removed
38. In ROM, each bit is a combination of the address variables is called
Correct : D. address
39. Which is not a removable drive?
Correct : C. super disk
40. In ROM, each bit combination that comes out of the output lines is called
Correct : C. data word
41. VLSI chip utilizes
Correct : D. all of the mentioned
42. The time from the beginning of a read cycle to the end of tACS/tAA is called as
Correct : D. access time
43. Why did PROM introduced?
Correct : C. to provide flexibility
44. Which of the following is programmed electrically by the user?
Correct : C. prom
45. PROMs are available in
Correct : D. mos and bipolar technologies
46. How many 8 k × 1 RAMs are required to achieve a memory with a word capacity of 8 k and a word length of eight bits?
Correct : A. eight
47. Which of the following best describes the fusible-link PROM?
Correct : D. user-programmable, one-time programmable
48. Which part of a Flash memory architecture manages all chip functions?
Correct : B. floating-gate mosfet
49. How much locations an 8-bit address code can select in memory?
Correct : B. 256 locations
50. What is a fusing process?
Correct : C. it is a process by which programs are burnout to the diode/transistors
51. Fusing process is
Correct : B. irreversible
52. The cell type used inside a PROM is
Correct : C. fuse cells
53. How many types of fuse technologies are used in PROMs?
Correct : B. 3
54. Metal links are made up of
Correct : C. nichrome
55. EPROM uses an array of
Correct : B. n-channel enhancement type mosfet
56. The EPROM was invented by
Correct : B. dov frohman
57. Address decoding for dynamic memory chip control may also be used for
Correct : A. chip selection and address location
58. Which of the following describes the action of storing a bit of data in a mask ROM?
Correct : C. a 1 is stored by connecting the gate of a mos cell to the address line
59. The check sum method of testing a ROM
Correct : D. simply indicates that the contents of the rom are incorrect
60. The initial values in all the cells of an EPROM is
Correct : B. 1
61. To store 0 in such a cell, the floating point must be
Correct : C. charged
62. The major disadvantage of RAM is?
Correct : C. it is volatile
63. Which one of the following is used for the fabrication of MOS EPROM?
Correct : C. tms 2516
64. How many addresses a MOS EPROM have?
Correct : C. 2516
65. To read from the memory, the select input and the power down/program input must be
Correct : B. low
66. ROMs retain data when
Correct : D. all of the mentioned
67. When a RAM module passes the checker board test it is
Correct : C. probably good
68. What is the difference between static RAM and dynamic RAM?
Correct : C. dynamic ram must be refreshed, static ram does not
69. What is access time?
Correct : C. the time taken to read a stored word after applying the address bits
70. What are the typical values of tOE?
Correct : D. all of the mentioned
71. Which of the following is not a type of memory?
Correct : C. eeprom
72. The chip by which both the operation of read and write is performed
Correct : A. ram
73. RAM is also known as
Correct : A. rwm
74. If a RAM chip has n address input lines then it can access memory locations upto
Correct : C. 2n
75. The n-bit address is placed in the
Correct : B. mar
76. Which of the following control signals are selected for read and write operations in a RAM?
Correct : C. read and write
77. Computers invariably use RAM for
Correct : C. high speed main memory
78. How many types of RAMs are?
Correct : A. 2
79. Static RAM employs
Correct : D. bjt or mos
80. Dynamic RAM employs
Correct : A. capacitor or mosfet
81. Which one of the following is volatile in nature?
Correct : D. ram
82. The magnetic core memories have been replaced by semiconductor RAMs, why?
Correct : D. all of the mentioned
83. The data written in flip-flop remains stored as long as
Correct : A. d.c. power is supplied
84. What is memory decoding?
Correct : B. the process of memory ic used in a digital system is selected for the range of address assigned
85. The first step in the design of memory decoder is
Correct : C. address assignment
86. How many address bits are required to select memory location in Memory decoder?
Correct : C. 12 kb
87. How memory expansion is done?
Correct : C. by connecting memory ics together
88. IC 4116 is organised as
Correct : C. 32 * 4
89. To construct 16K * 4-bit memory, how many 4116 ICs are required?
Correct : D. 4
90. How many 1024 * 1 RAM chips are required to construct a 1024 * 8 memory system?
Correct : C. 8
91. 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
92. The full form of PLD is
Correct : C. programmable logic devices
93. PLD contains a large number of
Correct : D. all of the mentioned
94. Logic circuits can also be designed using
Correct : C. pld
95. How many types of PLD is?
Correct : A. 2
96. PAL refers to
Correct : C. programmable array logic
97. Outputs of the AND gate in PLD is known as
Correct : B. output lines
98. PLA contains
Correct : A. and and or arrays
99. PLA is used to implement
Correct : C. a complex combinational circuit
100. A PLA is similar to a ROM in concept except that
Correct : C. it doesn’t provide full decoding to the variables