MCQs on Digital Electronics

Digital electronics can be defined as the field of physics wherein digital signals and the devices that produce or use these signals are studied. The digital circuits include diodes and resistors which are used to control the current and voltage in the circuit. Devices like laptops, televisions, remote control, etc are the ones that use the process of digital electronics.

Parts of Digital Electronics

Computerized gadgets or the advanced circuit contains different parts that fill explicit roles. These parts are isolated into two classifications:

1. Dynamic parts

2. Aloof parts

The dynamic parts are the semiconductors and diodes while the aloof parts are the capacitors, resistors, inductors, and so forth.

Diodes

Diodes are produced utilizing semiconductor materials. They are utilized for permitting the progression of current in a specific way. Various kinds of diodes are utilized in the development of the computerized circuit.

Semiconductors

A semiconductor gadget with three terminals is known as the semiconductor. The principle capacity of the semiconductor is to intensify the sign, and it is likewise utilized as an exchanging gadget.

Capacitors and Inductors

The fundamental capacity of the capacitor is to store electrical energy. A capacitor is made utilizing two directing plates and between these plates, a cover is put. The adjustment of the current is opposed with the assistance of an inductor. They are utilized for putting away electric energy in the attractive field.

Rationale Gates

Rationale entryways are the fundamental parts of the advanced circuit with one result and more than one info. What's more, OR and NOT entryways are the essential doors while NAND and NOR the widespread entryways. EX-OR and EX-NOR are the exceptional entryways.

Sample Questions: 

Q1: The following truth table corresponds to the logic gate

1. NAND

2. OR

3. AND

4. XOR

Answer: (b) OR

Q2: Boolean Algebra is essentially based on

1. Truth

2. Logic

3. Symbol

4. Numbers

Answer: (b) Logic

Q3: The logic behind NOR gate is that it gives

1. HIgh output when both the inputs are low.

2. Low output when both the inputs are low.

3. HIgh output when both the inputs are high.

4. None of the above

Answer: (a) HIgh output when both the inputs are low.

Q4: An electronic circuit also known as a logic gate is used to take

1. Makes logic decisions.

2. Allows electrons flow only in one direction.

3. Woks binary algebra.

4. Alternates between 0 and 1 values.

Answer: (a) Makes logic decisions

Q5: How many NAND gates are used to form an AND gate?

1. 1

2. 2

3. 3

4. 4

Answer: (b) 2

Q6: Which logic gate is built by the following combination of logic gates?

(Image will be uploaded soon)

Answer: (c) AND

Q7: The output of the OR gate is 1

1. If both inputs are zero.

2. If either or both inputs are 1.

3. Only if both inputs are 1.

4. If either input is zero.

Answer: (b) If either or both inputs are 1.

Q8: Which of the following logic gates is a universal gate?

1. OR

2. NOT

3. AND

4. NOR

Answer: (d) NOR

Q9: A gate in which all the inputs must be low to get a high output is

1. sNAND gate

2. Inverter

3. NOR gate

4. AND gate

Answer: (b) Inverter

Q10: The outputs of a NAND gate is 0

1. If both inputs are 0.

2. If one input is 0 and the other input is 1.

3. If both inputs are 1.

4. If both inputs are 1 or one of the inputs is 1 and the other one is 0.

Answer: (c) If both inputs are 1.