Digital Logic

Combinational Circuits Logic functions & Minimization Number representation and computer arithmetic Sequential Circuits

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Digital Logic - Combinational Circuits

11: Which of the following gates would output 1 when one input is 1 and other input is 0 ?

A.	OR gate
B.	AND gate
C.	NAND gate
D.	both (a) and (c)
	Answer Report Discuss
	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

12: Which of the following statements is wrong ?

A.	Propagation delay is the time required for a gate to change its state
B.	Noise immunity is the amount of noise which can be applied to the input of a gate without causing the gate to change state
C.	Fan-in of a gate is always equal to fan-out of the same gate
D.	Operating speed is the maximum frequency at which digital data can be applied to a gate
	Answer Report Discuss
	Option: C Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

13:

Which of the following expressions is not equivalent to X ' ?

A.	X NAND X
B.	X NOR X
C.	X NAND 1
D.	X NOR 1
	Answer Report Discuss
	Option: D Explanation : Answer is C as if X= 0 then X NAND 1 = 1 = X ' if X=1 then X NAND 1= 0= X' In Option (d) if X= 0 then X NOR 0 = 1 = X' if X=1 then X NOR 1= 0 <> X' Click on Discuss to view users comments. Ahmad said: (1:28am on Wednesday 18th January 2017) what about A?if X= 0 then X(0) NAND X(0) = 1 = X 'if X=1 then X(1) NAND X(1) = 0= X' Arghyadeep Sen said: (6:15pm on Monday 12th March 2018) Question was about "not equivalent to" Write your comments here: Updating your Comments.. Updating your Comments..

14: Which of the following gates are added to the inputs of the OR gate to convert it to the NAND gate ?

A.	NOT
B.	AND
C.	OR
D.	XOR
	Answer Report Discuss
	Option: A Explanation : Click on Discuss to view users comments. mahmoud said: (3:46am on Thursday 5th April 2018) NOR gate***?! Write your comments here: Updating your Comments.. Updating your Comments..

15: The EXCLUSIVE NOR gate is equivalent to which gate followed by an inverter ?

A.	OR
B.	AND
C.	NAND
D.	XOR
	Answer Report Discuss
	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

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