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Home » GAT Subject » Aptitude Test - 164
Hassan
1.When a transistor is cut off or saturated, transistor _____ have almost no effect
A. wave
B. variations
C. stage
D. wave
2.Express -7 as 16-bit signed binary numbers.
A. 0000 0000 0000 0111
B. 1000 0000 0000 0111
C. 0111 0000 0000 0001
D. 0000 0000 0000 0111
3.With an RS latch a high S and low R sets the output to _____ ; a low S and a high R _____ the output to low.
A. No change, set
B. Race, high
C. high, reset
D. No change, set
4.Flip-flop outputs are always
A. complimentary
B. the same
C. independent of each other
D. complimentary
5.The output 0 and 1 levels for TTL logic family is approximately
A. 0.1 and 5 V
B. 0.6 and 3.5 V
C. 0.9 and 1.75V
D. 0.1 and 5 V
6.A _____ TTL device can sink up to 16mA and can source up to 400 MA.
A. Low-power
B. high-power
C. Standard
D. Low-power
7.Digital design often starts by constructing a _____ table.
A. Standard
B. Two-stage
C. Truth
D. Standard
8.The hexadecimal digits are 0 to 9 and A to _____
A. E
B. F
C. G
D. E
9.The ASCII
A. is a subset of 8-bit EBCDIC
B. is used only in Western Countries
C. is version II of the ASC Standard
D. is a subset of 8-bit EBCDIC
10.An OR gate has 6 inputs. What is the only input word that produces a 0 output?
A. 0
B. 111
C. 111000
D. 0
11.A diagram that illustrates the ore (Logic) of functions in a program called a
A. Flowchart
B. Sequence of steps
C. Direction of flow
D. Flowchart
12.The Gray code for decimal 7 is
A. 111
B. 1011
C. 100
D. 111
13.The time required for a pulse to decrease from 90 to 10 percent of its maximum value is known as
A. rise time
B. decay time
C. binary level transition period
D. rise time
14.Conversion of binary number 1010000101112 to hexadecimal number is
A. D8F916
B. A8B916
C. A1716
D. D8F916
15._____dominates the LSI field, and _____ is used extensively where lowest power consumption is necessary.
A. NMOS, PMOS
B. PMOS, CMOS
C. NMOS, CMOS
D. NMOS, PMOS
16.Conversion of an octal number 1438 to its decimal number is
A. 9010
B. 97110
C. 9910
D. 9010
17.How many inputs signals can a gate have?
A. one
B. more than one
C. two only
D. one
18.A combinational logic circuit which is used when it is desired to send data from two or more source through a single transmission line is known as
A. encoder
B. decoder
C. multiplexer
D. encoder
19.Conversion of binary number 10010012 to hexadecimal is
A. 4016
B. 3916
C. 4916
D. 4016
20.Which logic family dissipates the minimum power?
A. DTL
B. TTL
C. ECL
D. DTL
21.What logic function is obtained by adding an inverter to the inputs of an AND gate?
A. OR
B. NAND
C. XOR
D. OR
22.A bus is a group of _____ carrying digital signals.
A. wires
B. gates
C. transistors
D. wires
23.The simplified form of the Boolean expression (X + Y + XY)(X + Z) is
A. X + Y + Z
B. XY + YZ
C. X + YZ
D. X + Y + Z
24.Addition of 102 and 112 is
A. 1002
B. 1012
C. 1112
D. 1002
25.How many bits are required to encode all twenty six letters ten symbols, and ten numerals?
A. 5
B. 6
C. 2
D. 5
26.An inverter is also called a _____ gate.
A. NOT
B. OR
C. AND
D. NOT
27.The binary number 1100 0101 has _____ bytes
A. 1
B. 2
C. 4
D. 1
28.With a NAND latch a low R and a low S produce a _____ condition.
A. race
B. set
C. reset
D. race
29.Which of the following logic families has the highest noise immunity?
A. RTL
B. DTL
C. TTL
D. RTL
30.The ALU carries out arithmetic and logic operations. It processes _____ numbers rather than decimal numbers.
A. decimal
B. hexadecimal
C. binary
D. decimal
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