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Digital Electronics

Digital Electronics
2's Complement of 10101011 is

 01010101
 00111100
 10101011
 10101100

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Digital Electronics
The XS-3 code is a

 cyclic code
 error-correcting code
 weighted code
 self-complementing code

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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
 2 Mhz
 8 Mhz

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Digital Electronics
A gate is inhibited when its inhibit input is at logic 1. The gate is

 NAND
 none of these
 AND
 OR

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Digital Electronics
A single flip-flop can be cleared (reset) to

 Both A and B
 0
 None
 1

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Digital Electronics
A bubbled NAND gate is equivalent to a

 X-OR gate
 NAND gate
 OR gate
 NOR gate

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MORE MCQ ON Digital Electronics

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