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Digital Electronics

Digital Electronics
The NOR gate is OR gate followed by ___________.

NAND gate
None of these
AND gate
NOT gate

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Digital Electronics
The number of parity bits in a 12-bit Hamming code is

 4
 6
 5
 8

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Digital Electronics
Which of these circuits have higher gate complexity 1. Carry look ahead adder 2. Ripple carry adder

 2
 1
 none
 both have same

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Digital Electronics
A bubbled NAND gate is equivalent to a

 OR gate
 NOR gate
 NAND gate
 X-OR gate

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Digital Electronics
While using a frequency counter for measuring frequency, two modes of measurement are possible. 1. Period time 2. Frequency mode There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4Mhz the crossover frequency is given by

 2 Khz
 1 Khz
 8 Mhz
 2 Mhz

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Digital Electronics
An 8 × 4 ROM contains a decoder of size

 8 × 8
 3 × 8
 8 × 4
 3 × 4

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