On This Page
This set of Digital Logic Circuits DLC Multiple Choice Questions & Answers (MCQs) focuses on Digital Logic Circuits Set 8
Q1 | Full subtractor is used to perform subtraction of
- 2 bits
- 3 bits
- 4 bits
- 8 bits
Q2 | The full subtractor can be implemented using
- two xor and an or gates
- two half subtractors and an or gate
- two multiplexers and an and gate
- two comparators and an and gate
Q3 | The output of a subtractor is given by (if A, B and X are the inputs).
- a and b xor x
- a xor b xor x
- a or b nor x
- a nor b xor x
Q4 | The output of a full subtractor is same as
- half adder
- full adder
- half subtractor
- decoder
Q5 | A register is defined as
- the group of latches for storing one bit of information
- the group of latches for storing n-bit of information
- the group of flip-flops suitable for storing one bit of information
- the group of flip-flops suitable for storing binary information
Q6 | The register is a type of
- sequential circuit
- combinational circuit
- cpu
- latches
Q7 | How many types of registers are?
- 2
- 3
- 4
- 5
Q8 | The main difference between a register and a counter is
- a register has no specific sequence of states
- a counter has no specific sequence of states
- a register has capability to store one bit of information but counter has n-bit
- a register counts data
Q9 | In D register, ‘D’ stands for
- delay
- decrement
- data
- decay
Q10 | Registers capable of shifting in one direction is
- universal shift register
- unidirectional shift register
- unipolar shift register
- unique shift register
Q11 | A register that is used to store binary information is called
- data register
- binary register
- shift register
- d – register
Q12 | A shift register is defined as
- the register capable of shifting information to another register
- the register capable of shifting information either to the right or to the left
- the register capable of shifting information to the right only
- the register capable of shifting information to the left only
Q13 | How many methods of shifting of data are available?
- 2
- 3
- 4
- 5
Q14 | In serial shifting method, data shifting occurs
- one bit at a time
- simultaneously
- two bit at a time
- four bit at a time
Q15 | What is a recirculating register?
- serial out connected to serial in
- all q outputs connected together
- a register that can be used over again
- parallel out connected to parallel in
Q16 | When is it important to use a three-state buffer?
- when two or more outputs are connected to the same input
- when all outputs are normally high
- when all outputs are normally low
- when two or more outputs are connected to two or more inputs
Q17 | After two clock pulses, the register contains
- 10111000
- 10110111
- 11110000
- 11111100
Q18 | How much storage capacity does each stage in a shift register represent?
- one bit
- two bits
- four bits
- eight bits
Q19 | The decimal number system represents the decimal number in the form of
- hexadecimal
- binary coded
- octal
- decimal
Q20 | 29 input circuit will have total of
- 32 entries
- 128 entries
- 256 entries
- 512 entries
Q21 | BCD adder can be constructed with 3 IC packages each of
- 2 bits
- 3 bits
- 4 bits
- 5 bits
Q22 | The output sum of two decimal digits can be represented in
- gray code
- excess-3
- bcd
- hexadecimal
Q23 | The addition of two decimal digits in BCD can be done through
- bcd adder
- full adder
- ripple carry adder
- carry look ahead
Q24 | 3 bits full adder contains
- 3 combinational inputs
- 4 combinational inputs
- 6 combinational inputs
- 8 combinational inputs
Q25 | The simplified expression of full adder carry is
- c = xy+xz+yz
- c = xy+xz
- c = xy+yz
- c = x+y+z