1. The minimum number of transistors required to implement a two input AND gate is
Correct : C. 6
2. Using DeMorgan’s Theorem we can convert any AND-OR structure into
Correct : A. NAND-NAND
3. For a memory with a 16-bit address space, the addressability is
Correct : D. Cannot be determined
4. Because we wish to allow each ASCII code to occupy one location in memory, most memories are
_____ addressable.
Correct : A. BYTE
5. Circuit A is a 1-bit adder; circuit B is a 1 bit multiplier. (Hint: Construct the truth table for the adder and the multiplier)
Correct : A. Circuit A has more gates than circuit B
6. When the write enable input is not asserted, the gated D latch ______ its output.
Correct : A. can not change
7. A structure that stores a number of bits taken “together as a unit” is a
Correct : D. register
8. We say that a set of gates is logically complete if we can build any circuit without using any other
kind of gates. Which of the following sets are logically complete
Correct : C. set of {AND,OR,NOT}
9. Of the following circuits, the one which involves storage is
Correct : A. RS Latch
10. If m is a power of 2, the number of select lines required for an m-input mux is:
Correct : C. log2 (m)
11. For the number A[15:0] = 0110110010001111, A[14:13] is ______ A[3:2].
Correct : C. the same as
12. Which of the following conditions is not allowed in an RS latch?
Correct : A. R is asserted, S is asserted
13. Which of the following pair of gates can form a latch?
Correct : C. a pair of cross coupled NAND
14. ‘Burst refresh’ in DRAM is also called
Correct : A. Concentrated refresh
15. The number of interrupt lines in 8085 is
Correct : D. 5
16. A real number consists of
Correct : C. integer part, fraction part along with positive or negative sign
17. Assertion (A): Negative values of incremental operator in DO loop are allowed in Fortran 77 but not in earlier versions of Fortran. Reason (R): Fortran 77 has better array facilities than earlier versions of Fortran.
Correct : B. Both A and R are correct but R is not correct explanation of A
18. Which of the following is not treated as hexadecimal constant by assembler in 8085?
Correct : C. 234
19. IC 7485 cannot be cascadeD.
Correct : B. False
20. An I/O processor controls the flow of information between
Correct : B. main memory and I/O devices
21. MS Access is a DBMS software.
Correct : A. True
22. When .9432 E – 4 is subtracted from .5452 E – 3 in normalized floating point mode
Correct : B. .9432 E – 4 is changed to .09432 E – 3 and .5452 E – 3 is not changed
23. DS directive in 8085
Correct : C. forces the assembler to reserve a specified number of consecutive bytes in the memory
24. Which of the following is a valid integer constant?
Correct : A. 127
25. The five flags in 8085 are designated as
Correct : A. Z, CY, S, P and AC
26. In 8085 which addressing mode is also called inherent addressing?
Correct : C. Implicit
27. It is possible to copy a file in the same directory.
Correct : A. True
28. In a computer the data transfer between hard disk and CPU is nearly the same as that between
diskette and CPU.
Correct : B. False
29. The timing difference between a slow memory and fast processor can be resolved if
Correct : C. either (a) or (b)
30. In 8086 the number of bytes which can be addressed directly is about
Correct : D. one million
31. In Fortran 77 a variable name can contain special characters.
Correct : B. False
32. Which of the following is not a general purpose peripheral?
Correct : C. Programmable CRT controller
33. In one’s complement 8 bit representation 11111111 represents
Correct : B. -0
34. The operating modes of 8255 A are called
Correct : B. mode 0, mode 1 and mode 2
35. Which of the following is type declaration statement in C?
Correct : A. int bar
36. Internet is a worldwide network of computers where most of the information is freely available.
Correct : A. True
37. A 37 bit mantissa has an accuracy of
Correct : D. 11 decimal places
38. In a C expression using assignment operators, relational operators and arithmetic operators, the
hierarchy of operations (in the absence of parenthesis) is
Correct : D. arithmetic, relational, assignment
39. In 8085, the pins for SID and SOD are
Correct : B. 5 and 4 respectively
40. Assertion (A): Each memory chip has its own address latch.
Reason (R): ALE signal comes out of microprocessor 8085 and goes to memory chip.
Correct : D. A is wrong R is correct
41. An e-mail message can be sent to many recipients.
Correct : A. True
42. In C the keywords are also called
Correct : B. reserved words
43. The character set of Fortran 77 includes lower case alphabets a to z.
Correct : B. False
44. Which memory has read operation, byte erase, byte write and chip erase?
Correct : C. EEPROM
45. The forms of IF statements in FORTRAN 77 are called
Correct : B. logical IF, block IF and arithmetic IF
46. In 8085
Correct : A. P flag is set when the result has even parity
47. If the sign bit of mantissa is 0 and the exponent is increased from a positive to a more negative
number the result is
Correct : A. a larger floating point number
48. A microprocessor is a chip integrating all the functions of a CPU of a computer.
Correct : B. single
49. Microprocessor is a/an circuit that functions as the CPU of the compute
Correct : A. electronic
50. Microprocessor is the of the computer and it perform all the computational tasks
Correct : B. heart
51. The purpose of the microprocessor is to control
Correct : A. memory
52. The first digital electronic computer was built in the year
Correct : C. 1940
53. In 1960's texas institute invented
Correct : A. integrated circuits
54. The intel 8086 microprocessor is a processor
Correct : B. 16 bit
55. The microprocessor can read/write 16 bit data from or to
Correct : A. memory
56. In 8086 microprocessor , the address bus is bit wide
Correct : D. 20 bit
57. The work of EU is
Correct : B. decoding
58. The 16 bit flag of 8086 microprocessor is responsible to indicate
Correct : A. the condition of result of ALU operation
59. The CF is known as
Correct : A. carry flag
60. The SF is called as
Correct : B. sign flag
61. The OF is called as
Correct : A. overflow flag
62. The IF is called as
Correct : C. interrupt flag
63. The register AX is formed by grouping
Correct : A. AH & AL
64. The SP is indicated by
Correct : B. stack pointer
65. The BP is indicated by
Correct : A. base pointer
66. The SS is called as
Correct : B. stack segment
67. The index register are used to hold
Correct : A. memory register
68. The BIU contains FIFO register of size bytes
Correct : B. 6
69. The BIU prefetches the instruction from memory and store them in
Correct : A. queue
70. The 1 MB byte of memory can be divided into segment
Correct : B. 64 Kbyte
71. The DS is called as
Correct : A. data segment
72. The CS register stores instruction in code segment
Correct : C. codes
73. The IP is bits in length
Correct : C. 16 bits
74. The push source copies a word from source to
Correct : A. stack
75. LDs copies to consecutive words from memory to register and
Correct : B. DS
76. IMUL source is a signed
Correct : A. multiplication
77. destination inverts each bit of destination
Correct : A. NOT
78. The JS is called as
Correct : A. jump the signed bit
79. Instruction providing both segment base and offset address are called
Correct : B. far type
80. The conditional branch instruction specify for branching
Correct : A. conditions
81. The microprocessor determines whether the specified condition exists or not by testing the
Correct : B. conditional flag
82. The LES copies to words from memory to register and
Correct : C. ES
83. The translates a byte from one code to another code
Correct : A. XLAT
84. The contains an offset instead of actual address
Correct : B. IP
85. The 8086 fetches instruction one after another from of memory
Correct : A. code segment
86. The BIU contains FIFO register of size 6 bytes called .
Correct : A. queue
87. The is required to synchronize the internal operands in the processor CLK
Signal
Correct : A. UR Signal
88. The pin of minimum mode AD0-AD15 has address
Correct : B. 20 bit
89. The pin of minimum mode AD0- AD15 has _ data bus
Correct : C. 16 bit
90. is used to write into memory
Correct : B. WR
91. The functions of Pins from 24 to 31 depend on the mode in which is operating
Correct : B. 8086
92. The RD, WR, M/IO is the heart of control for a mode
Correct : A. minimum
93. In a minimum mode there is a on the system bus
Correct : A. single
94. If MN/MX is low the 8086 operates in mode
Correct : B. Maximum
95. In max mode, control bus signal So,S1 and S2 are sent out in form
Correct : B. encoded
96. The bus controller device decodes the signals to produce the control bus signal
Correct : C. external
97. A Instruction at the end of interrupt service program takes the execution back to the
interrupted program
Correct : B. return
98. The main concerns of the are to define a flexible set of commands
Correct : A. memory interface
99. Primary function of memory interfacing is that the should be able to read from
and write into register
Correct : B. microprocessor
100. To perform any operations, the Mp should identify the