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Digital Electronics

Digital Electronics
NOT gates are to be added to the inputs of which gate to convert it to a NOR gate?

 NAND
 AND
 X-NOR
 OR

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Digital Electronics
Four ROM chips of 16 × 4 size have their address buses connected together. This system will be of size

 64 × 4
 16 × 16
 32 × 8
 256 × 1

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Digital Electronics
If J = K (J and K are shorted) in a JK flip-flop, what circuit is made

 Shorted JK flip-flop
 T flip-flop
 K flip-flop
 SR flip-flop

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Digital Electronics
Consider the following multiplication: (10w1z) × (15)10 = (y01011001)2 Which one of the following gives appropriate values of w,y and z?

 w = 1,y = 1,z = 0
 w = 0,y = 1,z = 1
 w = 0,y = 0,z = 1
 w = 1,y = 1,z = 1

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Digital Electronics
Simplified form of the function f = (x+y+xy)(x+z)

 x+yz
 x+y
 x+xyz
 y+xz

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Digital Electronics
The only function of NOT gate is to ___________.

None of these
Act as a universal gate
Invert input signal
Stop signal

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