## Digital Electronics Interview Questions

## 1. What is the difference between Latch And Flip-flop?

The distinction among locks and Flip-flop is that the hooks are level activated and flip-flops are edge activated. In locks level activated implies that the yield of the hooks changes as we change the information and edge activated implies that control flag possibly changes its state when goes from low to high or high to low.## 2. What is the binary number system?

The framework which has a base 2 is known as the paired framework and it comprises of just two digits 0 and 1.For Example: Take decimal number 625

625 = 600 + 20 + 5

That implies,

6×100 + 2×10 + 5

6 ×102 + 2×101 + 5×100

In this 625 comprise of three bits, we begin composing the numbers from the furthest right piece control as 0 then the second piece as power 1 and the last as power 2. Along these lines, we can speak to a decimal number as

∑digit × 10corresponding position or bit

Here 10 is the absolute number of digits from 0 to 9.

## 3. What is the best Example of Digital system?

Digital Computer.## 4. How many types of number system are there?

There are four types of number system:- Decimal Number System.
- Binary Number System.
- Octal Number System.
- Hexadecimal Number System.

## 5. What is a Logic gate?

The fundamental entryways that make up the computerized framework are known as a rationale door. The circuit that can work on numerous paired contributions to play out a specific rationale work is called an electronic circuit.## 6. What are the basic Logic gates?

There are three basic logic gates-- AND gate.
- OR gate.
- NOT gate.

## 7. Which gates are called as Universal gate and what are its advantages?

The Universal doors are NAND and NOR. The upsides of these entryways are that they can be utilized for any rationale estimation.## 8. What are the applications of the octal number system?

The applications of the octal number system are as follows:- For the efficient use of microprocessors.
- For the efficient use of digital circuits.
- It is used to enter binary data and display of information.

## 9. What are the fundamental properties of Boolean algebra?

The basic properties of Boolean algebra are:- Commutative Property.
- Associative Property.
- Distributive Property.

## 10. What is meant by K-Map or Karnaugh Map?

K-Map is a pictorial portrayal of truth table in which the guide is comprised of cells, and each term in this speaks to the min term or max term of the capacity. By this technique, we can specifically limit the Boolean capacity without following different advances.## 11. Name the two forms of Boolean expression?

The two forms of Boolean expression are:- Sum of products (SOP) form.
- The Product of sum (POS) form.

## 12. What are Minterm and Maxterm?

A minterm is called Product of aggregate since they are the consistent AND of the arrangement of factors and Maxterm are called whole of item since they are the sensible OR of the arrangement of factors.## 13. Write down the Characteristics of Digital ICs?

The characteristics of digital ICs are -- Propagation delay.
- Power Dissipation.
- Fan-in.
- Fan-out.
- Noise Margin.

## 14. What are the limitations of the Karnaugh Map?

The confinements of Karnaugh Map are as per the following:- It is constrained to six variable maps which implies in excess of six variable including articulations are not diminished.
- These are helpful for just improving Boolean articulation which is spoken to I standard structure.

## 15. What are the advantages and disadvantages of the K-Map Method?

The benefits of the K-Map strategy are as per the following-- It is a fantastic strategy for improving articulation up to four factors.
- For the coherent rearrangements, it gives us a visual technique.
- It is appropriate for both SOP and POS types of decrease.
- It is progressively appropriate for classroom lessons on rationale disentanglement.
- The disservices of the K-Map strategy are as per the following:
- It isn't appropriate when the quantity of factors surpasses more than four.
- For Computer decrease, it isn't appropriate.
- We need to take while entering the numbers in the phone like 0, 1 and couldn't care less terms.

## 16. Define Pair, Quad, and Octet?

**Pair:**Two adjoining cell of karnaugh map is called as Pair. It drops one variable in a K-Map improvement.

**Quad:**A Pair of Four contiguous matches in a karnaugh map is known as a quad. It drops two factors in a K-Map disentanglement.

**Octet:**A Pair of eight nearby pair in a karnaugh map is called an octet. It drops four factors in a K-map rearrangements.

## 17. Define Fan-in and Fan-out?

Fan-in-The Fan-in of the door implies that the quantity of sources of info that are associated with the entryway without the corruption of the voltage dimension of the framework.Fan-out-The Fan-out is the most extreme number of same contributions of a similar IC family that a door can drive keeping up its yield levels inside as far as possible.

## 18. Write the definition of the Duality Theorem?

Duality Theorem states that we can derive another Boolean expression with the existing Boolean expression by:- Changing OR operation (+ Sign) to AND operation (. Dot Sign) and vice versa.
- Complimenting 0 and 1 in the expression by changing 0 to 1 and 1 to 0 respectively.

## 19. What are the applications of Multiplexer (MUX)?

The applications of the multiplexer are as follows:- It is used as a data selector from many inputs to get one output.
- It is used as A/D to D/A Converter.
- These are used in the data acquisition system.
- These are used in time multiplexing system.

## 20. What are the applications of Demultiplexer?

The applications of the demultiplexer are as follows:- It is used in the data transmission system with error detection.
- It is used as a decoder for the conversion of binary to decimal.
- It is used as a serial to parallel converter.

## 21. Define Rise Time?

Rise time is the time that is required to change the voltage level from 10% to 90%.## 22. Define fall time?

Fall time is the time that is required to change the voltage level from 90% to 10%.## 23. Define Setup time?

The base time that is required to keep up the consistent voltage levels at the excitation contributions of the flip-flop gadget before the activating edge of the clock beat for the dimensions to be dependably checked in the flip lemon is known as the Setup time. It is indicated as tsetup.## 24. What are the applications of Flip-Flops?

The applications of flip-flops are:- Flip-flops are used as the delay element.
- These are used for Data transfer.
- Flip-flops are used in Frequency Division and Counting.
- Flip-Flops are used as the memory element.

## 25. What is the difference between D-latch and D Flip-flop?

D-latch is level sensitive whereas flip-flop is edge sensitive. Flip-flops are made up of latches.## 26. What are the applications of Buffer?

Applications of buffer are as follows:- Buffer helps to introduce small delays.
- Buffer helps for high Fan-out.
- Buffer are used to eliminate cross talks.