CAOMIDTERMEXAM

Question 1

Which logic gate outputs true only when both inputs are false?

OR gate

NAND gate

AND gate

NOR gate

Answer 1

NOR gate

Question 2

In floating-point representation, what does the exponent field determine?

The total number of bits

The range of values that can be represented

The precision of the representation

The sign of the number

Answer 2

The range of values that can be represented

Question 3

What does the high-order bit indicate in signed integer representation?

The value of the number

The byte size

The sign of the number

The magnitude of the number

Answer 3

The sign of the number

Question 4

In a truth table, how many output combinations are there for a function with three inputs?
4
16
6
8

Answer 4

8

Question 5

Which of the following Boolean operators has the highest precedence?

AND

NOT

XOR

OR

Answer 5

NOT

Question 6

What happens to the output of a NOR gate when both inputs are high (1)?

Depends on external conditions

Undefined

0

1

Answer 6

0

Question 7

In a half adder, which gate is used to calculate the sum?

XOR gate

AND gate

NOT gate

OR gate

Answer 7

XOR gate

Question 8

In a full adder circuit, which operation is used to calculate the carry output?

OR operation

AND operation

XOR operation

NOT operation

Answer 8

AND operation

Question 9

Which logic gate outputs true only when exactly one input is true?

NAND

AND

XOR

OR

Answer 9

XOR

Question 10

What does a carry bit indicate in binary addition?

The sum is negative.

An overflow has occurred.

The sum is even.

No carry has occurred.

Answer 10

An overflow has occurred.

Question 11

How many bits does the IEEE-754 single precision floating point standard use for the exponent?

8 bits

52 bits

23 bits

11 bits

Answer 11

8 bits

Question 12

What is a characteristic of floating-point numbers in computers?

They are always stored in hexadecimal format.

They can only represent whole numbers.

They can represent a wide range of real numbers.

They use a fixed-size field for all components.

Answer 12

They can represent a wide range of real numbers.

Question 13

What is the output of a 2-input NAND gate when both inputs are 1?

0

1

Depends on the circuit

Undefined

Answer 13

0

Question 14

In Boolean algebra, what does the term “canonical form” refer to?

The simplest possible form of an expression.

Any arbitrary arrangement of variables and operators.

An expression that contains no variables.

A standard representation using sum-of-products or product-of-sums.

Answer 14

A standard representation using sum-of-products or product-of-sums.

Question 15

Which circuit configuration allows for carry propagation through multiple stages?

Parallel adder

Full adder

Half adder

Ripple-carry adder

Answer 15

Ripple-carry adder

Question 16

Which logic gate is represented by the expression ?

OR gate

NOT gate

XOR gate

AND gate

Answer 16

AND gate

Question 17

Which representation allows for two different representations for zero?

Floating-point representation

Two’s complement

One’s complement

Signed magnitude

Answer 17

Signed magnitude

Question 18

In Boolean algebra, which identity states that A+AB=A?

Idempotent Law

Distributive Law

Absorption Law

Complement Law

Answer 18

Absorption Law

Question 19

What is the primary function of a full adder?

To store data

To perform multiplication

To add two bits and manage carry input

To compare two binary numbers

Answer 19

To add two bits and manage carry input

Question 20

In IEEE-754 single precision format, how many bits are allocated for the significand?

8 bits

64 bits

23 bits

52 bits

Answer 20

23 bits