Ripple counters are also called ____________

• A) Synchronous counters
• B) VLSI counters
• C) Asynchronous counters
• D) SSI counters

In 8x1 multiplexer, which one of the following lines must always be connected to ground in order to activate the mutiplexer?

• A) Y
• B) G'
• C) Vcc
• D) W

How many flop flops are required to create a counter circuit which can count from 0 to 7?

• A) 2
• B) 3
• C) 1
• D) 4

To create a Johnson Counter by using D-flip flops, how flip flops should be connected together?

• A) Q output of previous flip flop should be connected to D input of second flip flop
• B) Q' output of previous flip flop should be connected to clock input of second flip flop
• C) Q' output of previous flip flop should be connected to D input of second flip flop
• D) Q output of previous flip flop should be connected to clock input of second flip flop

Three decade counter would have ____________

• A) 4 BCD counters
• B) 5 BCD counters
• C) 2 BCD counters
• D) 3 BCD counters

What is the maximum possible range of bit-count specifically in n-bit binary counter consisting of ‘n’ number of flip-flops?

• A) 0 to 2n+1
• B) 0 to 2n + 1
• C) 0 to 2n
• D) 0 to 2n – 1

How many select lines would be required for an 8x1 multiplexer?

• A) 3
• B) 1
• C) 2
• D) 8

The parallel outputs of a counter circuit represent the _____________

• A) Parallel data word
• B) Clock count
• C) Counter modulus
• D) Clock frequency

A counter circuit is usually constructed of ____________

• A) A number of flip-flops connected in cascade
• B) A number of latches connected in cascade form
• C) A number of NOR gates connected in cascade form
• D) A number of NAND gates connected in cascade form

A decimal counter has ______ states.

• A) 10
• B) 2
• C) 9
• D) 7

Which of the following is the modified code of Excess-3 code?

• A) ASCII
• B) BCD
• C) EBDIC
• D) Gray Code

Why do we use Gray Code?

• A) Error Correction
• B) To count the number or bit changes
• C) Error Detection
• D) Invert the code

Which of the following is an invalid BCD code?

• A) 1101
• B) 0101
• C) 0011
• D) 1001

Reflected Binary Code is also known as _______ code.

• A) ASCII
• B) Excess-3
• C) Gray Code
• D) BCD

Convert the Gray code 1011 to binary.

• A) 0111
• B) 1011
• C) 1101
• D) 1010

Convert the binary number 1100 to Gray code.

• A) 1000
• B) 0101
• C) 0111
• D) 1010

Following diagram is of ______________ code conversion. https://storage.googleapis.com/tb-img/production/20/09/F1_S.B_Deepak_03.03.2020_D%201.png

• A) Excess-3
• B) Gray
• C) BCD
• D) ASCII

Total number of inputs in a half adder is __________.

• A) 3
• B) 2
• C) 1
• D) 4

A half adder can be built by using the combination of ________________ and ________________ gates.

• A) AND, OR
• B) AND, XOR
• C) OR, XOR
• D) AND, NOT

In order to build an XOR gate using NAND gates only, ______________ gate(s) are required.

• A) 3
• B) 4
• C) 1
• D) 2