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Digital Computer Electronics
Quiz 7
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Q.1
Conversion of binary number 101101
2
to its decimal number is
45
10
43
10
40
10
47
10
None of the above
Q.2
_____ is the fastest logic family; it's used in high-speed applications.
DTL
TTL
ECL
MOS
None of the above
Q.3
Conversion of a hexadecimal number 63
16
to binary number is
1100111
2
1100011
2
111011
2
1100111
2
None of the above
Q.4
FETs are used in linear ICs to:
increase input resistance
provide large resistances
increase device complexity
(a) and (b) above
None of the above
Q.5
A flip-flop can store
one bit of data
two bits of data
three bits of data
any number of bits of data
None of the above
Q.6
Conversion of decimal number 99
10
to hexadecimal number is
63
16
8
16
61
16
50
16
None of the above
Q.7
Conversion of binary number 1101100111111000
2
to hexadecimal number is
D8F8
16
A8B9
16
789
16
D9F8
16
None of the above
Q.8
When the LOAD input of a buffer register is active, the input word is stored on the next positive _____ edge.
clock
pulse
register
transistor
None of the above
Q.9
Which of the following is the first integrated logic family?
RTL
DTL
TTL
MOS
None of the above
Q.10
Conversion of 1011011
2
to it's decimal equivalent is
81
10
91
10
100
10
200
10
None of the above
Q.11
The octal equivalent of decimal 324.987 is
504.771
640.781
815.234
90.987
None of the above
Q.12
Addition of 110101101
2
, 111011101
2
, 000111111
2
, 100101101
2
, 111110111
2
is
1011010111010
2
1111011000010
2
1000101000101
2
01001000000010
2
None of the above
Q.13
A demultiplexer is also known as
data selector
data distributor
multiplexer
encoder
None of the above
Q.14
One way to simplify the sum-of-products equation is to use boolean algebra. Another way is the _____ map.
De Morgan
Standard
Schottky
Karnaugh
None of the above
Q.15
With a JK master-slave flip-flop the master is cocked when the clock is _____ and the slave is triggered when the clock is _____
set, reset
race, no change
high, low
set, race
None of the above
Q.16
The 7400 series, also called standard TTL, contains a variety of SSI and _____ chips that allow us to build all kinds of digital circuits and systems.
LSI
MSI
MOS
MOSFET
None of the above
Q.17
The XOR gates are ideal for testing parity because even-parity words produce a _____ output and odd-parity words produce a _____ output
low, high
high, low
odd, even
even, odd
None of the above
Q.18
Which of the following is not true?
0X0 = 0
0 x 1 = 1
1 x 0 = 0
1 x 1 = 1
None of the above
Q.19
_____ has become the most widely used bipolar family.
DTL
TTL
ECL
MOS
None of the above
Q.20
The functional capacity of SSI 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.21
The master slave JK flip-flop is effectively a combination of
an SR flip-flop and a T flip-flop
an SR flip-flop and a D flip-flop
a T flip-flop and a D flip-flop
two T flip-flops
None of the above
Q.22
Names, numbers, and other information needed to solve a problem are called _____
program
instruction
data
controls
None of the above
Q.23
A typical microcomputer may have up to 65,536 registers in its memory. Each of these registers, usually called a _____
address
memory location
registers
chip
None of the above
Q.24
Conversion of binary number 10000000000
2
to decimal number is
1024
10
1034
10
1124
10
1037
10
None of the above
Q.25
Conversion of binary number 11111
2
to an octal number is
35
8
32
8
37
8
42
8
None of the above
Q.26
The hexadecimal number system is widely used in analyzing and programming ______
registers
chips
microprocessors
vacuum tube
None of the above
Q.27
A combinational logic circuit which is used to send data coming from a single source to two or more separate destinations is called as
decoder
encoder
multiplexer
demultiplexer
None of the above
Q.28
Conversion of binary number 101110
2
to an octal number is
35
8
46
8
56
8
50
8
None of the above
Q.29
How many full and half-adders are required to add 16-bit numbers?
8 half-adders, 8 full-adders
1 half-adders, 15 full-adders
16 half-adders, no full-adders
4 half-adders, 12 full-adders
None of the above
Q.30
An odd-parity generator produces an odd-parity bit to go along with the data. The parity of the transmitted data is _____ An XOR gate can test each received word for parity rejecting words with _____ parity.
odd, even
high, low
low, high
even, odd
None of the above
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