Quiz 2, Digital Electronics, BTCS103

1) Which of the following is a binary code used to represent characters in computers and communication systems? [GATE CSE 2017]

• a) Gray code

• b) Excess-3 code

• c) BCD code

• d) ASCII code

2) In digital electronics, a logic gate is a physical device that performs:

• a) Analog signal processing

• b) Mathematical operations

• c) Logical operations

• d) Data storage

3) The NOT gate, also known as an inverter, performs which operation on its input?

• a) AND

• b) OR

• c) NOT

• d) XOR

4) Which logic gate output will be true if and only if its two inputs are different?

• a) AND gate

• b) OR gate

• c) XOR gate

• d) NAND gate

 

5) The process of reducing a digital logic circuit to its simplest form, using algebraic manipulation and Boolean theorems, is called:

• a) Minimization

• b) Optimization

• c) Amplification

• d) Differentiation

6) Which of the following is NOT a minimization technique for digital logic circuits?

• a) Karnaugh map

• b) Quine-McCluskey method

• c) Booth's algorithm

• d) Petrick's method

7) How many input variables can a 4-to-1 multiplexer have?

• a) 2

• b) 4

• c) 8

• d) 16

8) Which binary code represents each decimal digit using a 4-bit binary number, allowing easy conversion between decimal and binary?

• a) BCD code

• b) Gray code

• c) Excess-3 code

• d) 2's complement code

9) Which of the following is a self-complementing code, where the 9's complement is the 10's complement of the number?  [GATE CSE 2018]

• a) Excess-3 code

• b) Gray code

• c) BCD code

• d) 1's complement code

10) Consider Z = X – Y, where X, Y and Z are all in sign-magnitude form. X and Y are each represented in n bits. To avoid overflow, the representation of Z would require a minimum of __________ [GATE CSE 2019]

 

• a) n+1 bits

• b) n-1 bits

• c) n+2 bits

• d) n bits