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Digital Electronics

Digital Electronics
How many flip flops are required to build a binary counter circuit to count from 0 to 1023?

 12.
 24.
  10.
  6.

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to positive logic system.

 0 V and 5 V
 1 V and -5 V
 –1.5 V and – 5 V
 5 V and 0 V

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Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 1:2
 2:3
 2:1
 1:1

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Digital Electronics
Positive integers must be represented by

 signed numbers
 None of these
 Both A and B
 unsigned number

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Digital Electronics
Which of the following is 2’s complement of +12?

 00001000
 01110011
 00000011
 00001100

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

 6
 8
 4
 5

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