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Jamia Millia Islamia MCA Previous Year Questions (PYQs)

Jamia Millia Islamia MCA Digital Circuit Design PYQ

Jamia Millia Islamia MCA PYQ
Which of the following is not equivalent to $x$?





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Jamia Millia Islamia MCA Previous Year PYQ Jamia Millia Islamia MCA JAMIA MCA 2017 PYQ

Solution

$x\cdot x = x$, $x + x = x$, $x\cdot1 = x$, but $x + 1 = 1 \neq x$. $\boxed{x + 1}$
Jamia Millia Islamia MCA PYQ
Which of the following is a sequential circuit?





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Jamia Millia Islamia MCA Previous Year PYQ Jamia Millia Islamia MCA JAMIA MCA 2017 PYQ

Solution

Flip-flops store state → sequential circuits. $\boxed{\text{Flip-flop}}$
Jamia Millia Islamia MCA PYQ
Which of the following is a web browser?





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Jamia Millia Islamia MCA Previous Year PYQ Jamia Millia Islamia MCA JAMIA MCA 2017 PYQ

Solution

Opera is a web browser.
Jamia Millia Islamia MCA PYQ
Which of the following is not a universal logic gate?





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Jamia Millia Islamia MCA Previous Year PYQ Jamia Millia Islamia MCA JAMIA MCA 2016 PYQ

Solution

NAND and NOR are universal gates (all logic circuits can be made using them). Hence XNOR is not a universal gate.

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