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Digital-electronics Questions Set 151:

Quiz Mode

How many types of shift registers are there?

Solution:

The minimum number of comparators required to build a 4-bit flash ADC is:

256

Solution:

All logic operations can be obtained by using

AND & NAND operations

AND & NOR operations

OR & NOR operations

NAND & NOR operations

Solution:

If (AB.CD)16=(xxyx.y)5 then what is the value of (xy)7? (while converting xy to base 7 consider x and y as numbers in decimal system).

19.7

19.8

19.9

20.0

Solution:

How many 2-input NAND gates are required to realize the functions: f1 = Σm(0,1,3,4,7) and f2 = Σm(1,2,3,4,5,6) using a 3:8 decoder that generates maxterms?

Solution:

In signed magnitude representation, the binary equivalent of 22.5625 is (the bit before the comma represents the sign)

0,10110.1011

0,10110.1001

1,10101.1001

1,10110.1001

Solution:

Which CMOS gate is designed with three P-MOSFETs connected in series in the pull-up network and three N-MOSFETs connected in parallel in the pull-down network?

NAND

NOR

AND

Solution:

A mod 18 counter can be made from which counter?

Mod-16

Mod -8

Mod-32

Mod-4

Solution:

Which of the following statements is correct about a trigger pulse?

A trigger pulse starts a cycle of operation

A trigger pulse reverses the cycle of operation

A trigger pulse prevents a cycle of operation

A trigger pulse enhances a cycle of operation

Solution:

What is the indication of a short to ground in the output of a driving gate?

Only the output of the defective gate is affected

There is a signal loss to all load gates

The node may be stuck in either the HIGH or the LOW state

The affected node will be stuck in the HIGH state

Digital-electronics Questions Set 151:

How many types of shift registers are there?

Solution:

The minimum number of comparators required to build a 4-bit flash ADC is:

Solution:

All logic operations can be obtained by using

Solution:

If (AB.CD)16=(xxyx.y)5 then what is the value of (xy)7? (while converting xy to base 7 consider x and y as numbers in decimal system).

Solution:

How many 2-input NAND gates are required to realize the functions: f1 = Σm(0,1,3,4,7) and f2 = Σm(1,2,3,4,5,6) using a 3:8 decoder that generates maxterms?

Solution:

In signed magnitude representation, the binary equivalent of 22.5625 is (the bit before the comma represents the sign)

Solution:

Which CMOS gate is designed with three P-MOSFETs connected in series in the pull-up network and three N-MOSFETs connected in parallel in the pull-down network?

Solution:

A mod 18 counter can be made from which counter?

Solution:

Which of the following statements is correct about a trigger pulse?

Solution:

What is the indication of a short to ground in the output of a driving gate?

Solution:

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