Q. What is the minimum number of two-input NAND gates used to perform the function of two input OR gate ?

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Q. Odd parity of word can beconveniently tested by

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Q. Which one of the following will give the sum of full adders as output ?

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

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

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

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Q. Which of the following statements is wrong ?

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

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Q. The EXCLUSIVE NOR gate is equivalent to which gate followed by an inverter ?

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Q. A one-to-four line demultiplexer is to be implemented using a memory. How many bits must each word have ?

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Q. What logic function is produced by adding an inverter to the output of an AND gate ?

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Q. Which of the following gates is known as coincidence detector ?

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Q. Which table shows the logical state of a digital circuit output for every possible combination of logical states in the inputs ?

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Q. A positive AND gate is also a negative

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Q. A demultiplexer is used to

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Q. An OR gate can be imagined as

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Q. Which combination of gates does not allow the implementation of an arbitrary Boolean function?

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Q. How many full adders are required to construct an m-bit parallel adder ?

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Q. Parallel adders are

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Q. The most efficient method followed by computers to multiply two unsigned numbers is _______ .

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