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Introduction to HDL

Showing 1-75 of 100 answers

In this technique, there is a link between subscriber and network and a local loop.

TSDL
ASDL Correct
SSDL
DSDL

What does the symbol D represent in a hexadecimal number system?

13 Correct
14
8
16

(1217)8 is equivalent to

(2297)10
(1217)16
(028F)16 Correct
(0B17)16

>> operator is used to denote _________

less than
left shift
right shift Correct
greater than

2’s complement is obtained by adding 1 to 1’s complement of a number.

True Correct
False

3 bits full adder contains ________

8 combinational inputs Correct
4 combinational inputs
6 combinational inputs
3 combinational inputs

7’s complement of 432 is _________________

777
345 Correct
543
432

A ____________ is a circuit with only one output but can have multiple inputs.

Truth table
Boolean circuit
Binary circuit
Logic gate Correct

A bit in a computer terminology means either 0 or 1.

True Correct
False

A computer language that is written in binary codes only is _____

Pascal
C#
machine language Correct
C

A digital multiplexer is a combinational circuit that selects ___________

Many decimal outputs and accepts the selected information
One digital information from several sources and transmits the selected one Correct
Many digital information and convert them into one
Many decimal inputs and transmits the selected information

A technique that allocates time slots dynamically.

Statistical TDM Correct
Dynamic TDM
WDM
TDM

ABC is a valid hexadecimal number.

True Correct
False

Boolean Function is of the form of ________

K=f(X,Y,X)
Truth values Correct
Algebraic Expression
Truth Table

Convert (22)8 into its corresponding decimal number.

81
82
18 Correct
28

Convert (52)16 into its decimal equivalent.

28
83
82 Correct
80

Convert 111 110 010 from base 2 to base 8

215
672
762 Correct
125

Convert the binary equivalent 10101 to its decimal equivalent.

22
12
31
21 Correct

Convert the binary number 11001 to decimal.

3
15
13
25 Correct

For a two-input XNOR gate, with the input waveforms as shown below, which output waveform is correct?

d Correct
b
a
c

For the device shown here, assume the D input is LOW, both S inputs are LOW and the input is LOW. What is the status of the Y’ outputs?

All but Y0 are LOW
All are HIGH
All but Y0 are HIGH Correct
All are LOW

For voice, each channel contains a ___ word of digitized data.

1 Correct
4
0
2

How many AND gates are required to realize the following expression Y=AB+BC?

4
1
2 Correct
8

How many AND, OR and EXOR gates are required for the configuration of full adder?

1, 2, 2
3, 1, 2
2, 1, 2 Correct
4, 0, 1

How many select lines would be required for an 8-line-to-1-line multiplexer?

4
2
3 Correct
8

If a 3-input AND gate has eight input possibilities, how many of those possibilities will result in a HIGH output?

8
2
1 Correct
7

If a 3-input NOR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?

1 Correct
2
8
7

If a signal passing through a gate is inhibited by sending a LOW into one of the inputs, and the output is HIGH, the gate is a:

AND
NAND Correct
OR
NOR

In a multiplexer the output depends on its ___________

Enable pin
Data inputs
Select inputs Correct
Select outputs

In a number system, each position of a digit represents a specific power of the base.

True
False Correct

In double precision format, the size of the mantissa is ______

72
52 bit Correct
32 bit
64

In parts of the processor, adders are used to calculate ____________

Increment and decrement operators
Table indices
Addresses
All of the Mentioned Correct

In the boolean function w=f(X,Y,Z), what is the RHS referred to as ________

literals
right hand side
expression Correct
boolean

In the hexadecimal system, we allow _______ values for each digit of a number

10
8
16 Correct
2

In the IEEE floating point representation, the hexadecimal value 0 × 00000000 corresponds to

the normalized value 2-127
the special value +0 Correct
the normalized value +0
the normalized value 2-126

It is rooted in binary code, a series of zeroes and ones each having an opposite value.

Decimal Base
Numeric System
Radix Number System
Digital Logic Correct

Latches constructed with NOR and NAND gates tend to remain in the latched condition due to which configuration feature?

Low input voltages
Cross coupling Correct
Gate impedance
Synchronous operation

Let r denote number system radix. The only value(s) of r that satisfy the equation

decimal 10
decimal 11
any value > 2 Correct
decimal 10 and 11

Many time slots are wasted in __________

FDM
Asynchronous TDM
TDM
Synchronous TDM Correct

New CPU whose instruction set includes the instruction set of its predecessor CPU is said to be ___________ with its predecessor.

fully compatible
forward compatible
backward compatible Correct
compatible

Number of outputs in a half adder _____________

2 Correct
1
3
0

One multiplexer can take the place of ___________

Several SSI logic gates or combinational logic circuits Correct
Combinational logic circuits
Several Ex-NOR gates
Several SSI logic gates

Output will be a LOW for any case when one or more inputs are zero for a:

AND Gate Correct
OR Gate
NOT Gate
NOR Gate

P is a 16-bit signed integer. The 2's complement representation of P is (F87B)16.The 2's complement representation of 8*P

(C3D8)16 Correct
(F878)16
(187B)16
(987B)16

The ________ gate is an OR gate followed by a NOT gate.

NAND
NOR Correct
EXNOR
EXOR

The 1’s complement of 1111111110.101 is _______________

1010 Correct
0000000000010
1111111110101
1101

The 10’s complement of 562 is __________

4
7
3 Correct
8

The 16’s complement of 74E will be __________

8C2
2B8
8B2
F8B2 Correct

The 32 bit representation of the decimal number is called as ____

Extended format
Double-precision
None of the mentioned
Single-precision Correct

The 9’s complement of 6578 is ___________

3124
3420
3421 Correct
1234

The binary equivalent of the decimal number 10 is __________

0010
10
010
1010 Correct

The binary number 111 in octal format is ________________

7 Correct
6
5
8

The binary number 1110 in hexadecimal format is _____________

E Correct
15
14
6

The Boolean expression for a 3-input AND gate is ________.

X = AB
X = A + B + C
X = AB + C
X = ABC Correct

The carry propagation can be expressed as ________

All but Y0 are HIGH
Cp = AB
Cp = A + B Correct
All but Y0 are LOW

The complement of the input given is obtained in case of:

AND+NOR
NOR
EX-OR
NOT Correct

The complement term for X’.Y’.Z + X.Y will be _____________

XYZ’+X’Y’
(X+Y+Z’)(X’+Y)
(X+Y+Z’)(X’+Y’) Correct
(X+Y+Z’)(X’+Y)

The decimal value 0.5 in IEEE single precision floating point representation has

fraction bits of 000…000 and exponent value of 0
fraction bits of 100…000 and exponent value of 0
fraction bits of 000…000 and exponent value of −1 Correct
fraction bits of 100…000 and exponent value of 0

The device shown here is most likely a ________

Inverter
Demultiplexer Correct
Multiplexer
Comparator

The expression of a NAND gate is_______

AB
(A+B)’
A’B+AB’
(AB)’ Correct

The following figure shows a ___________ gate.

NOR Correct
EXOR
NAND
OR

The format used to present the logic output for the various combinations of logic inputs to a gate is called a:

truth table Correct
input logic function
Boolean constant
Boolean variable

The general form for calculating the number of rows in a truth table is ________

2n+1
-2n
2n Correct
2n-1

The input hexadecimal representation of 1110 is _______________

15
14
E Correct
0111

The max term when X=Y=Z=1 is ________

x+y+z
x’y’z’
xyz
x’+y’+z’ Correct

The maximum number of bits sufficient to represent a hexadecimal number in binary:

7
3
4 Correct
8

The min term when X=Y=Z=0 is _____________

x+y+z
x’+y’+z’
xyz
x’y’z’ Correct

The minterm of any expression is denoted by ___________

m Correct
Mt
M
min

The normalized representation of 0.0010110 * 2 9 is _______

0 10001000 0010110
0 10000101 0110 Correct
0 10101010 1110
0 11110100 11100

The number of literals in the expression F=X.Y’ + Z are _____________

4
2
3 Correct
1

The numbers written to the power of 10 in the representation of decimal numbers are called as _____

Height factors
Scale factors Correct
Size factors
None of the mentioned

The octal equivalent of 1100101.001010 is ______

62412
14521
15412
14512 Correct

The Output is LOW if any one of the inputs is HIGH in case of a _________ gate.

NAND Correct
NOR
AND
OR

The output of a NOR gate is HIGH if ________.

any input is HIGH
all inputs are HIGH
any input is LOW
all inputs are LOW Correct

The output of an AND gate with three inputs, A, B, and C, is HIGH when ________.

A = 1, B = 0, C = 1
A = 0, B = 0, C = 0
A = 1, B = 1, C = 0
A = 1, B = 1, C = 1 Correct