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Quiz 4
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Q.1
A flip-flop can store:
1 bits of data
2 bits of data
3 bits of data
4 bits of data
None of the above
Q.2
A logic circuit which is used to change a BCD number into an equivalent decimal number is
decoder
encoder
multiplexer
code converter
None of the above
Q.3
Conversion of binary number 110000
2
to hexadecimal is
30
16
40
16
43
16
27
16
None of the above
Q.4
Conversion of an octal number 106
8
to binary number is
1110010
2
1000110
2
1100110
2
10000110
2
None of the above
Q.5
Cyclic codes are used in
data transfer
continuously varying signal representation
arithmetic and logical computation
All of the above
None of the above
Q.6
The digits used in a binary number system are _____ and _____
9 and 0
0 and 1
1 and 2
3 and 4
None of the above
Q.7
The 2-input XOR gate has a high output only when the input bits are _____
even
different
low
high
None of the above
Q.8
The _____ is ultraviolet-light-erasable and electrically programmable. This allows the user to erase and store until programs and data are perfected.
EPROM
ROM
PROM
RAM
None of the above
Q.9
The leading bit stands for the _____ and the remaining bits for the _____ is known as signed binary numbers.
sign, remainder
sign, magnitude
value, sign
variable, value
None of the above
Q.10
A multiplexer is also known as
coder
decoder
data selector
multivibrator
None of the above
Q.11
The logic 1 in positive logic system is represented by:
zero voltage
lower voltage level
higher voltage level
negative voltage
None of the above
Q.12
Conversion of decimal number 99
10
to it's binary number equivalent is
1100011
2
100011
2
1110001
2
111 1000
2
None of the above
Q.13
The number of two-input NAND gates required to produce the two-input OR function is
1
2
3
4
None of the above
Q.14
Which of the following is not functionally a complete set?
AND, OR
NAND
NOR
AND, OR, NOT
None of the above
Q.15
A binary adder is a logic circuit that can add _____ binary numbers at a time.
Hundreds
Thousands
One
Two
None of the above
Q.16
A half-adder adds _____ bits
16
8
10
2
None of the above
Q.17
Standard TTL has a multiple emitter input transistor and a _____ output
totem-pole
bipolar
register
transistor
None of the above
Q.18
A shift register moves the _____ left or right. Serial loading means storing a word in a shift register by entering _____ bit per clock pulse. With parallel or broadside loading, it takes only one _____ pulse to load the input word.
light, eight, clock
right, eight, clock
bits, one, register
bits, one, clock
None of the above
Q.19
A 2's-complement adder-subtracter can add or subtract binary numbers. Sign-magnitude numbers represent _____ decimal numbers, and 2's complements stand for _____ decimal numbers.
hexa, sign
sign, hexa
positive, negative
negative, positive
None of the above
Q.20
The fan-out capability of a digital building block can be defined as
the number of inputs that one output can transmit to
the amount of cooling required for fanning the hear out
the number of inputs that can transmit to one input
the maximum power dissipation (heat generation) that the unit can stand.
None of the above
Q.21
Conversion of an octal number 73
8
to binary number is
110111
2
111100
2
110010
2
111011
2
None of the above
Q.22
Conversion of binary number 1100001
2
to hexadecimal is
57
16
61
16
51
16
43
16
None of the above
Q.23
The 2764 is 65,536-bit EPROM organized as 8,192 words of 8 bits each. How many address lines does it have?
12
14
13
8
None of the above
Q.24
What does 4k represent?
4000
4096
40
400
None of the above
Q.25
The main advantage of hexadecimal numbers is the case of conversion from hexadecimal to _____ and vice versa.
decimal
binary
ASCE
BCD
None of the above
Q.26
Conversion of decimal number 42
10
to it's octal number equivalent is
57
8
42
8
47
8
52
8
None of the above
Q.27
Conversion of an octal number 110
8
to its decimal number is
70
10
72
10
73
10
110
10
None of the above
Q.28
Computer ICs work reliably because they are based on _____ design.
Top-bottom
System
Two-stage
Two-states
None of the above
Q.29
The maximum count which a 6-bit binary word can represent is
36
64
63
65
None of the above
Q.30
Conversion of binary number 1010000
2
to an octal number is
119
8
101
8
111
8
120
8
None of the above
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