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This set of Digital Logic Circuits DLC Multiple Choice Questions & Answers (MCQs) focuses on Digital Logic Circuits Set 7
Q1 | Which of the following is the Universal Flip-flop?
- s-r flip-flop
- j-k flip-flop
- master slave flip-flop
- d flip-flop
Q2 | How many types of triggering takes place in a flip flops?
- 3
- 2
- 4
- 5
Q3 | The term synchronous means _
- the output changes state only when any of the input is triggered
- the output changes state only when the clock input is triggered
- the output changes state only when the input is reversed
- the output changes state only when the input follows it
Q4 | The S-R, J-K and D inputs are called
- asynchronous inputs
- synchronous inputs
- bidirectional inputs
- unidirectional inputs
Q5 | The characteristic of J-K flip-flop is similar to
- s-r flip-flop
- d flip-flop
- t flip-flop
- gated t flip-flop
Q6 | A J-K flip-flop can be obtained from the clocked S-R flip-flop by augmenting
- two and gates
- two nand gates
- two not gates
- two or gates
Q7 | What is the significance of the J and K terminals on the J-K flip-flop?
- there is no known significance in their designations
- the j represents “jump,” which is how the q output reacts whenever the clock goes high and the j input is also high
- the letters were chosen in honour of jack kilby, the inventory of the integrated circuit
- all of the other letters of the alphabet are already in use
Q8 | 48 MHz.
- 10.24 khz
- 5 khz
- 30.24 khz
- 15 khz
Q9 | How many flip-flops are in the 7475 IC?
- 2
- 1
- 4
- 8
Q10 | In parts of the processor, adders are used to calculate
- addresses
- table indices
- increment and decrement operators
- all of the mentioned
Q11 | Total number of inputs in a half adder is
- 2
- 3
- 4
- 1
Q12 | In which operation carry is obtained?
- subtraction
- addition
- multiplication
- both addition and subtraction
Q13 | If A and B are the inputs of a half adder, the sum is given by
- a and b
- a or b
- a xor b
- a ex-nor b
Q14 | If A and B are the inputs of a half adder, the carry is given by
- a and b
- a or b
- a xor b
- a ex-nor b
Q15 | Half-adders have a major limitation in that they cannot
- accept a carry bit from a present stage
- accept a carry bit from a next stage
- accept a carry bit from a previous stage
- accept a carry bit from the following stages
Q16 | The difference between half adder and full adder is
- half adder has two inputs while full adder has four inputs
- half adder has one output while full adder has two outputs
- half adder has two inputs while full adder has three inputs
- all of the mentioned
Q17 | If A, B and C are the inputs of a full adder then the sum is given by
- a and b and c
- a or b and c
- a xor b xor c
- a or b or c
Q18 | If A, B and C are the inputs of a full adder then the carry is given by
- a and b or (a or b) and c
- a or b or (a and b) c
- (a and b) or (a and b)c
- a xor b xor (a xor b) and c
Q19 | Half subtractor is used to perform subtraction of
- 2 bits
- 3 bits
- 4 bits
- 5 bits
Q20 | For subtracting 1 from 0, we use to take a from neighbouring bits.
- carry
- borrow
- input
- output
Q21 | How many outputs are required for the implementation of a subtractor?
- 1
- 2
- 3
- 4
Q22 | Let the input of a subtractor is A and B then what the output will be if A = B?
- 0
- 1
- a
- b
Q23 | Let A and B is the input of a subtractor then the output will be
- a xor b
- a and b
- a or b
- a exnor b
Q24 | Let A and B is the input of a subtractor then the borrow will be
- a and b’
- a’ and b
- a or b
- a and b
Q25 | What does minuend and subtrahend denotes in a subtractor?
- their corresponding bits of input
- its outputs
- its inputs
- borrow bits