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Digital Electronics

Digital Electronics
What is the 2’s complement of 10110000?

 10110000
 10001110
 01001111
 01010000

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Digital Electronics
Which is the correct order of sequence for representing the input values in K-map?

(00, 10, 01, 11)
(00, 01, 10, 11)
(00, 01, 11, 10)
(00, 10, 11, 01)

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Digital Electronics
A device which converts decimal number into BCD form is called

 multiplexer
 encoder
 decoder
 code converter

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Digital Electronics
A self-complementing code for the decimal digits is created using the weight 4 4 3 -2. The value of 8592 in the code is

 1100 1001 1111 1000
 1100 0111 1111 0011
 1100 1011 1111 1001
 1000 0101 1001 0010

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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
 2 Mhz
 1 Khz
 8 Mhz

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Digital Electronics
What is the minimum number of 2 input NAND gates used to perform the function of 2 input OR gate

 4
 3
 2
 1

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