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Home » GAT Subject » Aptitude Test - 166
Hassan
1.For what logic gate the outputs in complement of the input?
A. NOT
B. AND
C. OR
D. NOT
2.What is the decimal equivalent of 210?
A. 4096
B. 1024
C. 1000
D. 4096
3.The maximum number of TTL loads that a TTL device can drive reliably over the specified temperature range is
A. fanout
B. bipolar
C. chip
D. fanout
4.The output of the following gate is 0 only if at least one of the inputs is 1:
A. AND gate
B. OR gate
C. EX-OR gate
D. AND gate
5.In which of the following adder circuits, the carry look ripple delay is eliminated?
A. Half adder
B. Full adder
C. Parallel adder
D. Half adder
6.With positive clocking the clock signal must be _____ for the flip-flop to respond.
A. high
B. low
C. set
D. high
7.Conversion of binary number 10100002 to an octal number is
A. 1198
B. 1018
C. 1118
D. 1198
8.Conversion of an octal number 478 to its binary number is
A. 1100112
B. 1001112
C. 1100112
D. 1100112
9.A _____ is a group of devices that store digital data.
A. circuits
B. register
C. variations
D. circuits
10.Semiconductor memory is:
A. somewhat slower than magnetic core memory
B. a volatile memory
C. somewhat larger than the magnetic core memory
D. somewhat slower than magnetic core memory
11.Conversion of an octal number 1108 to its decimal number is
A. 7010
B. 7210
C. 7310
D. 7010
12.Computer ICs work reliably because they are based on _____ design.
A. Top-bottom
B. System
C. Two-stage
D. Top-bottom
13.The maximum count which a 6-bit binary word can represent is
A. 36
B. 64
C. 63
D. 36
14.A half-adder is also known as:
A. AND circuit
B. NAND circuit
C. NOR circuit
D. AND circuit
15.Why are digital circuits easier to design than analog circuits?
A. they do not control electricity precisely over a wide range
B. they are made in the form of ICs
C. all elements of digital circuit are from the same family
D. they do not control electricity precisely over a wide range
16.A binary adder is a logic circuit that can add _____ binary numbers at a time.
A. Hundreds
B. Thousands
C. One
D. Hundreds
17.A half-adder adds _____ bits
A. 16
B. 8
C. 10
D. 16
18.The 2764 is 65,536-bit EPROM organized as 8,192 words of 8 bits each. How many address lines does it have?
A. 12
B. 14
C. 13
D. 12
19.What does 4k represent?
A. 4000
B. 4096
C. 40
D. 4000
20.The _____ is ultraviolet-light-erasable and electrically programmable. This allows the user to erase and store until programs and data are perfected.
A. EPROM
B. ROM
C. PROM
D. EPROM
21.The logic 1 in positive logic system is represented by:
A. zero voltage
B. lower voltage level
C. higher voltage level
D. zero voltage
22.The number of two-input NAND gates required to produce the two-input OR function is
A. 1
B. 2
C. 3
D. 1
23.Which of the following is not functionally a complete set?
A. AND, OR
B. NAND
C. NOR
D. AND, OR
24.The fan-out capability of a digital building block can be defined as
A. the number of inputs that one output can transmit to
B. the amount of cooling required for fanning the hear out
C. the number of inputs that can transmit to one input
D. the number of inputs that one output can transmit to
25.Conversion of an octal number 738 to binary number is
A. 1101112
B. 1111002
C. 1100102
D. 1101112
26.Conversion of binary number 11000012 to hexadecimal is
A. 5716
B. 6116
C. 5116
D. 5716
27.The main advantage of hexadecimal numbers is the case of conversion from hexadecimal to _____ and vice versa.
A. decimal
B. binary
C. ASCE
D. decimal
28.Which of the following TTL subfamily is the fastest
A. standard TTL
B. high-speed TTL
C. schottky TTL
D. standard TTL
29.The leading bit stands for the _____ and the remaining bits for the _____ is known as signed binary numbers.
A. sign, remainder
B. sign, magnitude
C. value, sign
D. sign, remainder
30.A multiplexer is also known as
A. coder
B. decoder
C. data selector
D. coder
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