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Digital Computer Electronics
Quiz 6
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Q.1
The functional capacity for LSI devices is
1 to 11 gates
12 to 99 gates
100 to 10,000 gates
more than 10,000 gates
None of the above
Q.2
What is the 2's-complement representation of -24 in a 16-bit microcomputer?
0000 0000 0001 1000
1111 1111 1110 0111
1111 1111 1110 1000
0001 0001 1111 0011
None of the above
Q.3
A full-adder adds _____ bits, and producing a SUM and a _____
8, SUBTRACTION
3, CARRY
16, DIVIDE
All of the above
None of the above
Q.4
The radix of the binary number is:
3
1
2
10
None of the above
Q.5
Which gates is known as universal gate?
NOT gate
AND gate
NAND gate
XOR gate
None of the above
Q.6
An XOR gate recognizes only words with an _____ number of 1's.
even
odd
different
All of the above
None of the above
Q.7
Convert the 1000 0000 0000 1111 signed binary number to decimal number.
15
-15
-30
30
None of the above
Q.8
The _____ is a sequence of instructions that tells the computer how to process the data.
data
program
controls
instruction
None of the above
Q.9
The output of the following gate is 1 only if at least one of its inputs is 0.
AND gate
OR gate
NAND gate
NOR gate
None of the above
Q.10
The highest decimal number that can be represented with 10 binary digits is
1023
1024
512
All of the above
None of the above
Q.11
The clock signals are used in sequential logic circuits
to tell the time of the day
to tell how much time has elapsed since the system was turned on
to carry serial data signals
to synchronize events in various parts of a system
None of the above
Q.12
Conversion of binary number 1100011
2
to hexadecimal is
63
16
57
16
46
16
40
16
None of the above
Q.13
Conversion of binary number 1100011
2
to its decimal number is
29
10
97
10
99
10
93
10
None of the above
Q.14
Conversion of binary number 1100011
2
to an octal number is
140
8
143
8
147
8
149
8
None of the above
Q.15
A preliminary guide for comparing the simplicity of logic circuits is to count the number of input _____ leads.
wire
bus
gate
All of the above
None of the above
Q.16
An AND gate has 7 inputs, what is the only input word that produces a 1 output?
0
1111
1110000
1111111
None of the above
Q.17
A flip-flop is a _____ element that stores a binary digit as a low or high voltage.
chip
bus
I/O
memory
None of the above
Q.18
Conversion of decimal number 89
10
it's binary number equivalent is
1011011
2
1100111
2
1011001
2
10011
2
None of the above
Q.19
An AND gate has 7 inputs. How many input word are in its truth table?
64
32
16
128
None of the above
Q.20
When an inverter is placed between both inputs of an SR flip-flop, the resulting flip-flop is
JK flip-flop
D flip-flop
T flip-flop
Master slave JK flip-flop
None of the above
Q.21
Which of the following electronic component is not found in ordinary ICs?
diodes
resistors
transistors
inductors
None of the above
Q.22
A shift register can be used for
parallel to serial conversion
serial to parallel conversion
digital delay line
All of the above
None of the above
Q.23
Arithmetic operation are coded in
Decision symbols
Input/Outpur(I/0)
Processing symbols
Terminal symbols
None of the above
Q.24
Which of the following logic families use bipolar transistors?
TTL
GaAS
NMOS
CMOS
None of the above
Q.25
Which of the following Boolean algebra rules is wrong?
0 + A = A
1 + A = 1
A + A = A
1 . x = 1
None of the above
Q.26
Conversion of an octal number 60
8
to binary number is
110000
2
10011
2
1100111
2
1100110
2
None of the above
Q.27
Conversion of a octal number 63
8
to its decimal number is
51
10
61
10
57
10
53
10
None of the above
Q.28
Binary means _____
Three
Four
Ten
Two
None of the above
Q.29
For an input pulse train of clock period T, the delay produced by an n stage shift register is
(n-l)T
nT
(n+l)T
2nT
None of the above
Q.30
Which function positive logic is equivalent to OR function in negative logic?
NOT
AND
OR
NOR
None of the above
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