GATE Electrical Engineering (EE) Test: Arithmetic Logic Units Free Online

Test: Arithmetic Logic Units - Question 1

The basic building blocks of the arithmetic unit in digital computers are __________

A.
Subtractors
B.
Adders
C.
Multiplexer
D.
Comparator

Detailed Solution: Question 1

The basic building blocks of the arithmetic unit in digital computers are adders. Since a parallel adder is constructed with a number of full-adder circuits connected in cascade. By controlling the data inputs to the parallel adder, it is possible to obtain different types of arithmetic operations.

Test: Arithmetic Logic Units - Question 2

n a combinational circuit, the output at any time depends only on the _______ at that time.

A.
Voltage
B.
Intermediate values
C.
Input values
D.
Clock pulses

Detailed Solution: Question 2

In a combinational circuit, the output at any time depends only on the input values at that time and not on past or intermediate values.

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Test: Arithmetic Logic Units - Question 3

Procedure for the design of combinational circuits are:
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A. From the word description of the problem, identify the inputs and outputs and draw a block diagram.
B. Draw the truth table such that it completely describes the operation of the circuit for different
combinations of inputs.
C. Simplify the switching expression(s) for the output(s).
D. Implement the simplified expression using logic gates.
E. Write down the switching expression(s) for the output(s).

A.
B, C, D, E, A
B.
A, D, E, B, C
C.
A, B, E, C, D
D.
B, A, E, C, D

Detailed Solution: Question 3

Combinational circuits are the ones which do not depend on previous inputs and depends only on the present values. The given arrangement A, B, E, C, D is the right sequence for the designing of the combinational circuits.

Test: Arithmetic Logic Units - Question 4

The design of an ALU is based on __________

A.
Sequential logic
B.
Combinational logic
C.
Multiplexing
D.
De-Multiplexing

Detailed Solution: Question 4

The design of an ALU is based on combinational logic. Because the unit has a regular pattern, it can be broken into identical stages connected in cascade through carries.

Test: Arithmetic Logic Units - Question 5

If the two numbers include a sign bit in the highest order position, the bit conditions of interest are the sign of the result, a zero indication and __________

A.
An underflow condition
B.
A neutral condition
C.
An overflow condition
D.
One indication

Detailed Solution: Question 5

If the two numbers include a sign bit in the highest order position, the bit conditions of interest are the sign of the result, a zero indication and an overflow condition.

Test: Arithmetic Logic Units - Question 6

The flag bits in an ALU is defined as ___________

A.
The total number of registers
B.
The status bit conditions
C.
The total number of control lines
D.
All of the Mentioned

Detailed Solution: Question 6

In an ALU, status bit conditions are sometimes called condition code bits or flag bits. It is so called because they tend to represent the status of the respect flags after any operation.

Test: Arithmetic Logic Units - Question 7

If the two numbers are unsigned, the bit conditions of interest are the __ carry and a possible _ result.

A.
Input, zero
B.
Output, one
C.
Input, one
D.
Output, zero

Detailed Solution: Question 7

If the two numbers are unsigned, the bit conditions of interest are the output carry and a possible zero result.

Test: Arithmetic Logic Units - Question 8

All logic operations can be obtained by means of __________

A.
AND and NAND operations
B.
OR and NOR operations
C.
OR and NOT operations
D.
NAND and NOR operations

Detailed Solution: Question 8

Since the logic gates NOR and NAND are known as universal logic gates, therefore it can be used to design all the three basic gates AND, OR and NOT. Thus, it means that any operations can be obtained by implementation of these gates.

Test: Arithmetic Logic Units - Question 9

In a sequential circuit, the output at any time depends only on the input values at that time.

A.
Past output values
B.
Intermediate values
C.
Both past output and present input
D.
Present input values

Detailed Solution: Question 9

In a sequential circuit, the output at any time depends on the present input values as well as past output values. It also depends on clock pulses depending on whether it’s synchronous or asynchronous sequential circuits.

Test: Arithmetic Logic Units - Question 10

A digital system consists of _____ types of circuits.

A.
2
B.
3
C.
4
D.
5

Detailed Solution: Question 10

A digital system consists of two types of circuits and these are a combinational and sequential logic circuit. Combinational circuits are the ones which do not depend on previous inputs while Sequential circuits depend on past inputs.

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GATE Electrical Engineering (EE) Test: Arithmetic Logic Units Free Online

MCQ Practice Test & Solutions: Test: Arithmetic Logic Units (10 Questions)

The basic building blocks of the arithmetic unit in digital computers are __________

n a combinational circuit, the output at any time depends only on the _______ at that time.

The design of an ALU is based on __________

If the two numbers include a sign bit in the highest order position, the bit conditions of interest are the sign of the result, a zero indication and __________

The flag bits in an ALU is defined as ___________

If the two numbers are unsigned, the bit conditions of interest are the __ carry and a possible _ result.

All logic operations can be obtained by means of __________

In a sequential circuit, the output at any time depends only on the input values at that time.

A digital system consists of _____ types of circuits.

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GATE Electrical Engineering (EE) Mock Test Series 2027

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About this Electrical Engineering (EE) Practice Test

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GATE Electrical Engineering (EE) Test: Arithmetic Logic Units Free Online

MCQ Practice Test & Solutions: Test: Arithmetic Logic Units (10 Questions)

The basic building blocks of the arithmetic unit in digital computers are __________

n a combinational circuit, the output at any time depends only on the _______ at that time.

The design of an ALU is based on __________

If the two numbers include a sign bit in the highest order position, the bit conditions of interest are the sign of the result, a zero indication and __________

The flag bits in an ALU is defined as ___________

If the two numbers are unsigned, the bit conditions of interest are the ______ carry and a possible _____ result.

All logic operations can be obtained by means of __________

In a sequential circuit, the output at any time depends only on the input values at that time.

A digital system consists of _____ types of circuits.

GATE Electrical Engineering (EE) Mock Test Series 2027

GATE Electrical Engineering (EE) Mock Test Series 2027

Top Courses for Electrical Engineering (EE)

About this Electrical Engineering (EE) Practice Test

Explore more Electrical Engineering (EE) Study Resources

If the two numbers are unsigned, the bit conditions of interest are the __ carry and a possible _ result.