# Fundamentals Of Digital Electronics2

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Alexeialeesh
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DE quizzes 10 questions

• 1.

### A logic gate is an electronic circuit which

• A.

Makes logic decisions

• B.

Allows electron flow only in one direction

• C.

Works on binary algebra

• D.

Alternates between 0&1 values

A. Makes logic decisions
Explanation
A logic gate is an electronic circuit that makes logic decisions by processing input signals and producing output signals based on predefined logical rules. It uses Boolean algebra to determine the output based on the input values. The logic gate analyzes the input signals and determines whether the output should be high or low, representing true or false, on or off, or 1 or 0. Therefore, it can be said that a logic gate makes logic decisions.

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• 2.

### In negative logic, the logic state 1 corresponds to

• A.

Negative logic

• B.

Zero voltage

• C.

More negative voltage

• D.

Lower voltage level

D. Lower voltage level
Explanation
In negative logic, the logic state 1 corresponds to a lower voltage level. This means that when the logic state is 1, the voltage is lower compared to when the logic state is 0. This is the opposite of positive logic, where the logic state 1 corresponds to a higher voltage level.

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• 3.

### The output of a 2-input OR the gate is 0 only when itâ€™s

• A.

Both inputs are 0

• B.

Either input is 1

• C.

Both inputs are 1

• D.

Either input is 0

A. Both inputs are 0
• 4.

### An AND gate

• A.

• B.

Is equivalent to a series switching circuit

• C.

Is an any-or-all gate

• D.

Is equivalent to a parallel switching circuit

B. Is equivalent to a series switching circuit
• 5.

### The only function of a NOT gate is to

• A.

Stop a signal

• B.

Recomplement a signal

• C.

Invert an input signal

• D.

Act as a universal set

C. Invert an input signal
Explanation
A NOT gate is a basic logic gate that has only one input and one output. Its main function is to invert or negate the input signal. In other words, if the input signal is high or true, the output will be low or false, and vice versa. The NOT gate does not stop or recomplement a signal, nor does it act as a universal set. Its primary purpose is to invert the input signal.

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• 6.

• A.

48.625

• B.

59.487

• C.

48.487

• D.

59.625

D. 59.625
• 7.

### The decimal equivalent of sum of two binary numbers is         (1010101)2 and (1001010)2

• A.

300

• B.

200

• C.

326

• D.

226

C. 326

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• Current Version
• Mar 21, 2023
Quiz Edited by
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• Feb 17, 2009
Quiz Created by
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