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Home » GAT Subject » Computer Science » Aptitude Test - 39
1.Names, numbers, and other information needed to solve a problem are called _____
A. program
B. instruction
C. data
D. program
2.A typical microcomputer may have up to 65,536 registers in its memory. Each of these registers, usually called a _____
A. address
B. memory location
C. registers
D. address
3.Conversion of binary number 100000000002 to decimal number is
A. 102410
B. 103410
C. 112410
D. 102410
4.Conversion of binary number 111112 to an octal number is
A. 358
B. 328
C. 378
D. 358
5.Conversion of binary number 1011102 to an octal number is
A. 358
B. 468
C. 568
D. 358
6.The hexadecimal number system is widely used in analyzing and programming ______
A. registers
B. chips
C. microprocessors
D. registers
7.A combinational logic circuit which is used to send data coming from a single source to two or more separate destinations is called as
A. decoder
B. encoder
C. multiplexer
D. decoder
8.How many full and half-adders are required to add 16-bit numbers?
A. 8 half-adders, 8 full-adders
B. 1 half-adders, 15 full-adders
C. 16 half-adders, no full-adders
D. 8 half-adders, 8 full-adders
9.An odd-parity generator produces an odd-parity bit to go along with the data. The parity of the transmitted data is _____ An XOR gate can test each received word for parity rejecting words with _____ parity.
A. odd, even
B. high, low
C. low, high
D. odd, even
10.A gate is a logic circuit with one or more input signals but _____ output signal.
A. two
B. double
C. one
D. two
11.The XOR gates are ideal for testing parity because even-parity words produce a _____ output and odd-parity words produce a _____ output
A. low, high
B. high, low
C. odd, even
D. low, high
12.Which of the following is not true?
A. 0X0 = 0
B. 0 x 1 = 1
C. 1 x 0 = 0
D. 0X0 = 0
13._____ has become the most widely used bipolar family.
A. DTL
B. TTL
C. ECL
D. DTL
14.The functional capacity of SSI devices is
A. 1 to 11 gates
B. 12 to 99 gates
C. 100 to 10,000 gates
D. 1 to 11 gates
15.The master slave JK flip-flop is effectively a combination of
A. an SR flip-flop and a T flip-flop
B. an SR flip-flop and a D flip-flop
C. a T flip-flop and a D flip-flop
D. an SR flip-flop and a T flip-flop
16.The octal equivalent of decimal 324.987 is
A. 504.771
B. 640.781
C. 815.234
D. 504.771
17.One way to simplify the sum-of-products equation is to use boolean algebra. Another way is the _____ map.
A. De Morgan
B. Standard
C. Schottky
D. De Morgan
18.With a JK master-slave flip-flop the master is cocked when the clock is _____ and the slave is triggered when the clock is _____
A. set, reset
B. race, no change
C. high, low
D. set, reset
19.The 7400 series, also called standard TTL, contains a variety of SSI and _____ chips that allow us to build all kinds of digital circuits and systems.
A. LSI
B. MSI
C. MOS
D. LSI
20.Conversion of decimal number 9910 to hexadecimal number is
A. 6316
B. 816
C. 6116
D. 6316
21.Conversion of binary number 11011001111110002 to hexadecimal number is
A. D8F816
B. A8B916
C. 78916
D. D8F816
22.When the LOAD input of a buffer register is active, the input word is stored on the next positive _____ edge.
A. clock
B. pulse
C. register
D. clock
23.Addition of 1101011012, 1110111012, 0001111112, 1001011012, 1111101112 is
A. 10110101110102
B. 11110110000102
C. 10001010001012
D. 10110101110102
24.A demultiplexer is also known as
A. data selector
B. data distributor
C. multiplexer
D. data selector
25.Conversion of a octal number 638 to its decimal number is
A. 5110
B. 6110
C. 5710
D. 5110
26.Binary means _____
A. Three
B. Four
C. Ten
D. Three
27.For an input pulse train of clock period T, the delay produced by an n stage shift register is
A. (n-l)T
B. nT
C. (n+l)T
D. (n-l)T
28.Conversion of a hexadecimal number 6316 to binary number is
A. 11001112
B. 11000112
C. 1110112
D. 11001112
29.Which function positive logic is equivalent to OR function in negative logic?
A. NOT
B. AND
C. OR
D. NOT
30.Conversion of binary number 1011012 to its decimal number is
A. 4510
B. 4310
C. 4010
D. 4510
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