Jamia Millia Islamia MCA Digital Circuit Design Previous Year Questions (PYQs)
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Which of the following is not equivalent to $x$?
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Solution
$x\cdot x = x$, $x + x = x$, $x\cdot1 = x$, but $x + 1 = 1 \neq x$.
$\boxed{x + 1}$
Which of the following is a sequential circuit?
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Solution
Flip-flops store state → sequential circuits.
$\boxed{\text{Flip-flop}}$
Which of the following is a web browser?
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Solution
Opera is a web browser.
Which of the following is not a universal logic gate?
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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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