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Quiz 2
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Q.1
An OR gate has 6 inputs. How many input words are in its truth table?
64
32
16
128
None of the above
Q.2
The EXCLUSIVE - NOR gate is equivalent to an _____ gate followed by an invertor.
OR
AND
NAND
XOR
None of the above
Q.3
Which TTL sub-family has maximum speed?
standard TTL
schottky-clamped TTL
high speed TTL
low power TTL
None of the above
Q.4
The ALU carries out arithmetic and logic operations. It processes _____ numbers rather than decimal numbers.
decimal
hexadecimal
binary
All of the above
None of the above
Q.5
Conversion of decimal number 71
10
to it's binary number equivalent is
110011
2
1110011
2
0110011
2
1000111
2
None of the above
Q.6
Which of the following flip-flops is free from race around problem?
T flip-flop
SR flip-flop
master slave JK flip-flop
All of the above
None of the above
Q.7
Conversion of decimal number 67
10
to it's octal number equivalent is
100
8
103
8
109
8
99
8
None of the above
Q.8
A NOR gate has two or more input signals. All input must be _____ to get a high output
low
high
some low some high
1's
None of the above
Q.9
An inverter is also called a _____ gate.
NOT
OR
AND
NAND
None of the above
Q.10
Conversion of decimal number 13
10
to it's octal number equivalent is
15
8
17
8
13
8
11
8
None of the above
Q.11
The binary number 1100 0101 has _____ bytes
1
2
4
8
None of the above
Q.12
With a NAND latch a low R and a low S produce a _____ condition.
race
set
reset
no change
None of the above
Q.13
Which of the following logic families has the highest noise immunity?
RTL
DTL
TTL
HTL
None of the above
Q.14
The simplified form of the Boolean expression (X + Y + XY)(X + Z) is
X + Y + Z
XY + YZ
X + YZ
XZ + Y
None of the above
Q.15
De Morgan's first theorem says that a NOR gate is equivalent to a bubbled _____ gate.
AND
XAND
XOR
NOR
None of the above
Q.16
How many inputs signals can a gate have?
one
more than one
two only
both (a) and (b)
None of the above
Q.17
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
encoder
decoder
multiplexer
demultiplexer
None of the above
Q.18
Addition of 10
2
and 11
2
is
100
2
101
2
111
2
110
2
None of the above
Q.19
How many bits are required to encode all twenty six letters ten symbols, and ten numerals?
5
6
2
3
None of the above
Q.20
Conversion of binary number 1001001
2
to hexadecimal is
40
16
39
16
49
16
42
16
None of the above
Q.21
Which logic family dissipates the minimum power?
DTL
TTL
ECL
CMOS
None of the above
Q.22
What logic function is obtained by adding an inverter to the inputs of an AND gate?
OR
NAND
XOR
NOR
None of the above
Q.23
The Gray code for decimal 7 is
111
1011
100
101
None of the above
Q.24
The time required for a pulse to decrease from 90 to 10 percent of its maximum value is known as
rise time
decay time
binary level transition period
propagation delay
None of the above
Q.25
Conversion of binary number 101000010111
2
to hexadecimal number is
D8F9
16
A8B9
16
A17
16
D9F8
16
None of the above
Q.26
_____dominates the LSI field, and _____ is used extensively where lowest power consumption is necessary.
NMOS, PMOS
PMOS, CMOS
NMOS, CMOS
MOSFET, PMOS
None of the above
Q.27
Conversion of an octal number 143
8
to its decimal number is
90
10
971
10
99
10
107
10
None of the above
Q.28
Digital design often starts by constructing a _____ table.
Standard
Two-stage
Truth
Two-dinensional
None of the above
Q.29
The hexadecimal digits are 0 to 9 and A to _____
E
F
G
D
None of the above
Q.30
The ASCII
is a subset of 8-bit EBCDIC
is used only in Western Countries
is version II of the ASC Standard
has 128 characters, including 32 control characters
None of the above
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