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Home » GAT Subject » Aptitude Test - 165
Hassan
1.Which of the following flip-flops is free from race around problem?
A. T flip-flop
B. SR flip-flop
C. master slave JK flip-flop
D. T flip-flop
2.If a microcomputer has a 64K memory, what are the hexadecimal notations for the first and last memory locations?
A. 0000, EEEE
B. 0, 64
C. 0000, FFFF
D. 0000, EEEE
3.A microprocessor has memory locations from 0000 to 3FFF. Each memory location stores 1 byte. How bytes can the memory store? Express this in kilobytes?
A. 4,095, 4K
B. 16,384, 16K
C. 32,740, 32K
D. 4,095, 4K
4.The m-bit parallel adder consists of:
A. (m+1) full adders
B. m/2 full adders
C. m-1 full adders
D. (m+1) full adders
5.An OR gate has 6 inputs. How many input words are in its truth table?
A. 64
B. 32
C. 16
D. 64
6.Which TTL sub-family has maximum speed?
A. standard TTL
B. schottky-clamped TTL
C. high speed TTL
D. standard TTL
7.Conversion of binary number 1100012 to its decimal number is
A. 2710
B. 4910
C. 3910
D. 2710
8.The OR gate has two or more input signals. If any input is _____ the output is high.
A. low
B. high
C. 0
D. low
9.How many memory locations can 14 address bits access?
A. 16,384
B. 8,192
C. 4096
D. 16,384
10.The ASCII code is a 7-bit code for
A. letters
B. numbers
C. other symbols
D. letters
11.The EXCLUSIVE - NOR gate is equivalent to an _____ gate followed by an invertor.
A. OR
B. AND
C. NAND
D. OR
12.In boolean algebra, the times sign stands for the _____ operation
A. AND
B. OR
C. NAND
D. AND
13.What logic function is obtained by adding an inverter to the output of an AND gate?
A. OR
B. NAND
C. XOR
D. OR
14.Conversion of an octal number 74328 to a binary number is
A. 11110001101112
B. 1111000110102
C. 1100110101112
D. 11110001101112
15.Conversion of an octal number 1438 to hexadecimal number is
A. 6316
B. 6016
C. 5016
D. 6316
16.The memory cell of a dynamic RAM is simpler and smaller than the memory cell of a _____ RAM.
A. volatile
B. static
C. semiconductor
D. volatile
17.A byte is consist of _____ bits
A. two
B. four
C. eight
D. two
18.Addition of 11012 and 10102 is
A. 101012
B. 110002
C. 110112
D. 101012
19.What logic function is produced by adding an inverter to the output of an AND gate?
A. NAND
B. NOR
C. XOR
D. NAND
20.Division of 1000112 by 1012 is
A. 1002
B. 1112
C. 1012
D. 1002
21.The NOR gate is logically equivalent to an OR gate followed by an _____
A. AND
B. XAND
C. XOR
D. AND
22.The dynamic race hazard problem occurs in
A. combinational circuits only
B. sequential circuits only
C. both combinational and sequential circuits
D. combinational circuits only
23.Resistor Ratio design is used in linear ICs because
A. Ratios increase input resistance
B. Ratios increase amplifier gain
C. Precise resistor values are not possible with IC processes
D. Ratios increase input resistance
24.What advantages do ICs have over discrete-device circuits due to their greater complexity (i.e. more circuitry in less area)
A. Smaller size
B. Higher reliability
C. Lower cost
D. Smaller size
25.Conversion of an octal number 1368 to hexadecimal number is
A. 7E16
B. 5E16
C. 5A16
D. 7E16
26.The control and arithmetic-logic sections are called the _____
A. Block diagram
B. Control Unit
C. Input / Output Unit
D. Block diagram
27.How many full adders are required to construct an m- bit parallel adder?
A. m/2
B. m-1
C. m
D. m/2
28.The number of binary bits required to represent a hexadecimal digit is
A. 3
B. 4
C. 6
D. 3
29.Instead of counting with binary numbers, a ring counter uses words that have a single high _____
A. bytes
B. bit
C. gate
D. bytes
30.Multiplication of 1112 by 1012 is
A. 1100112
B. 1000112
C. 1111002
D. 1100112
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