41.
Which of the following is an output postfix
notation of (A-B)*(C/D)+E?
(A)
AB-CD/*E+
(B)
AB-CDE/*+
(C)
ABCDE-/*+
(D)
ABCDE+*/-
Answer: A
42. Back-patching
is useful for handling
(A)
Conditional jumps
(B)
Unconditional jumps
(C) Backward
references
(D) Forward
references
Answer: D
43. The
minimum time delay between the intiations of two independent memory operations
is called
(A) Access
time
(B) Cycle
time
(C) Transfer
rate
(D) Latency
time
Answer: B
44. Which
of the following does not need extra hardware for DRAM refreshing?
(A) 8085
(B)
Motorola-6800
(C) Z-80
(D) None of
the above
Answer: C
45. The
first operating system used in microprocessors is
(A) Zenix
(B) DOS
(C) CP/M
(D) Multics
Answer: C
46. Which
of the following is a programmable internal timer?
(A) 8251
(B) 8250
(C) 8253
(D) 8275
Answer: C
47. Which
of the following weights make the complement operation easier in BCD form?
(A) 8-4-2-1
(B) Excess-3
(C) 2-4-2-1
(D) 3-2-1-0
Answer: C
48. The
binary equivalent of the decimal number 0.4375 is
(A) 0.0111
(B) 0.1011
(C) 0.1100
(D) 0.1010
Answer: A
49. The
number of columns in a state table for the sequential circuit with’m’ flipflops
and ‘n’ input is
(A) m+n
(B) m+2n
(C) 2m+n
(D) 2m+2n
Answer: C
50. Which
chips are erasable by ultra violet rays after removing them from the main
circuit?
(A) EPROM
chips
(B) EEPROM
chips
(C) PROM
chips
(D) All of
the above
Answer: A
51. Which
of the following logic families is well suited for high speed operation?
(A) TTL
(B) ECL
(C) MOS
(D) CMOS
Answer: B
52. Which
of the following interrupts is both edge and level sensitive?
(A) RST5.5
(B) INTR
(C) RST 7.5
(D) TRAP
Answer: D
53. The
ASCII code 56 represents the character
(A) V
(B) 8
(C) a
(D) Carriage
return
Answer: B
54. Which
of the following is the minimum error code?
(A) Octal
code
(B) Binary
code
(C) Gray
code
(D) Excess-3
code
Answer: C
55. Which
of the following is volatile?
(A) Bubble
memory
(B) RAM
(C) ROM
(D) Magnetic
disc
Answer: B
56. How
many flip fops are needed to divide by 16?
(A) 2
(B) 4
(C) 8
(D) 16
Answer: B
57. The
maximum number of I/O devices that can be addressed by INTEL 8085 is
(A) 65536
(B) 255
(C) 512
(D) 256
Answer: D
58. The
instruction used to shift right the accumulator contents by one bit through the
carry flag bit is
(A) RLC
(B) RAL
(C) RRC
(D) RAR
Answer: D
59. Tera
is two to the power of
(A) 32
(B) 30
(C) 40
(D) 25
Answer: C
60. The
maximum number of nodes on level i of a binary tree is
(A) 2 i-1
(B) 3 i-1
(C) i+1
(D) 2 i+1
Answer: A
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