Digital Logic

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

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Digital Logic - Combinational Circuits

6: Odd parity of word can beconveniently tested by

A.	OR gate
B.	AND gate
C.	NOR gate
D.	XOR gate
	Answer Report Discuss
	Option: D Explanation : Click on Discuss to view users comments. prathap said: (7:03am on Friday 24th November 2017) truth table of XOR gate isx \| y \| Z0 \| 0 \| 00 \| 1 \| 11 \| 0 \| 11 \| 1 \| 1so when we observe the truth table the output is result to 1 only when there are odd number of 1's in input so we can call xor can be conveniently used to test odd parity word Write your comments here: Updating your Comments.. Updating your Comments..

Identify the logic function performed by the circuit shown in the given figure
logic-circuit

A.	Exclusive OR
B.	Exclusive NOR
C.	NAND
D.	NOR
	Answer Report Discuss
	Option: B Explanation : Click on Discuss to view users comments. pankaj sharma said: (4:13pm on Thursday 6th June 2013) the answer will be exclusive nor..output will be xy x'y' Write your comments here: Updating your Comments.. Updating your Comments..

8: Which one of the following will give the sum of full adders as output ?

A.	Three point majority circuit
B.	Three bit parity checker
C.	Three bit comparator
D.	Three bit counter
	Answer Report Discuss
	Option: D Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

The number of full and half-adders required to add 16-bit numbers is

A.	8 half-adders, 8 full-adders
B.	1 half-adder, 15 full-adders
C.	16 half-adders, 0 full-adders
D.	4 half-adders, 12 full-adders
	Answer Report Discuss
	Option: B Explanation : The one half-adder can add the least significant bit of the two numbers. Full adders are required to add the remaining 15 bits as they all involve adding carries. Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

10: The time required for a pulse to decrease from 90 to 10 per cent of its maximum value is called

A.	Rise time
B.	Decay time
C.	Binary level transition period
D.	Propagation delay
	Answer Report Discuss
	Option: B Explanation : Click on Discuss to view users comments. Write your comments here: Updating your Comments.. Updating your Comments..

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