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Quiz 1
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Q.1
A bus is a group of _____ carrying digital signals.
wires
gates
transistors
registers
None of the above
Q.2
Which of the following TTL subfamily is the fastest
standard TTL
high-speed TTL
schottky TTL
low-speed TTL
None of the above
Q.3
Conversion of an octal number 134
8
to a binary number is
001011011
2
001101100
2
001011100
2
110011
2
None of the above
Q.4
_____is an abbreviation for binary digit.
0 and 1
bingit
base
bit
None of the above
Q.5
Conversion of hexadecimal number 1D7F
16
to a decimal number is
7551
10
8771
10
5557
10
7781
10
None of the above
Q.6
An inventor is a gate with only _____ input; the output is always in the opposite state from the input
one
two
more than one
All of the above
None of the above
Q.7
Parallel adders are
combinational logic circuits
sequential logic circuits
both of the above
All of the above
None of the above
Q.8
A microcomputer is a computer that uses a _____ for its CPU.
chips
registers
microprocessor
vacuum tube
None of the above
Q.9
How many outputs signals can a gate have?
one
more than one
two only
both (a) and (b)
None of the above
Q.10
Conversion of an octal number 125
8
to its decimal number is
90
10
85
10
87
10
99
10
None of the above
Q.11
What is the main advantage of using MOSFET rather than bipolar transistor circuitary in ICs?
much greater complexity (more components) than bipolar circuits : better economy
higher operating speed than bipolar circuits
fewer power supply connections are required with MOS ICs
system designers are more familiar with MOS circuitary
None of the above
Q.12
The term sum-of-products in boolean algebra means
The AND function of several OR functions
The OR function of several AND functions
The OR function of several OR functions
The AND function of several AND functions
None of the above
Q.13
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.14
The memory cell of a dynamic RAM is simpler and smaller than the memory cell of a _____ RAM.
volatile
static
semiconductor
bipolar
None of the above
Q.15
A byte is consist of _____ bits
two
four
eight
ten
None of the above
Q.16
What is the 1's complement of 0000 1111 0010 1101 number?
1111 0000 0010 1101
1111 0000 1101 0010
1111 1100 1010 1100
1001 0010 1010 1100
None of the above
Q.17
Addition of 1101
2
and 1010
2
is
10101
2
11000
2
11011
2
10111
2
None of the above
Q.18
A NAND gate is equivalent to an AND gate followed by an inverter. All inputs must be _____ to get a low output
low
high
some low and some high
0's
None of the above
Q.19
The 2's compliment of binary number 010111.1100 is
101001.11
101000.01
10111.0011
101000.0011
None of the above
Q.20
In boolean algebra, the times sign stands for the _____ operation
AND
OR
NAND
NOR
None of the above
Q.21
What logic function is obtained by adding an inverter to the output of an AND gate?
OR
NAND
XOR
NOR
None of the above
Q.22
Conversion of an octal number 7432
8
to a binary number is
1111000110111
2
111100011010
2
110011010111
2
111111111000
2
None of the above
Q.23
Conversion of binary number 110001
2
to its decimal number is
27
10
49
10
39
10
50
10
None of the above
Q.24
The OR gate has two or more input signals. If any input is _____ the output is high.
low
high
0
All of the above
None of the above
Q.25
Conversion of an octal number 143
8
to hexadecimal number is
63
16
60
16
50
16
57
16
None of the above
Q.26
If a microcomputer has a 64K memory, what are the hexadecimal notations for the first and last memory location?
0000, EEEE
0, 64
0000, FFFF
0000, 9999
None of the above
Q.27
A microprocessor has memory locations from 0000 to 3FFF. Each memory location stores 1 byte. How bytes can the memory store? Express this in kilobytes?
4,095, 4K
16,384, 16K
32,740, 32K
46,040, 46K
None of the above
Q.28
How many memory locations can 14 address bits access?
16,384
8,192
4096
14
None of the above
Q.29
The ASCII code is a 7-bit code for
letters
numbers
other symbols
All of the above
None of the above
Q.30
The m-bit parallel adder consists of:
(m+1) full adders
m/2 full adders
m-1 full adders
m full adders
None of the above
0 h : 0 m : 1 s
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