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Digital Electronics

Digital Electronics
Convert the binary number (1111000011110000) to hexadecimal number

 F0F0
 5050
 1010
 7070

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Digital Electronics
In Boolean algebra, OR is represented by

 -
 ×
 +
 /

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Digital Electronics
F’s complement of (2BFD)Hex is

 D403
 D402
 E304
 C403

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Digital Electronics
X OR X' will result

 0
 X'
 X
 1

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Digital Electronics
Which of the following gates is known as a coincidence detector?

 AND gate
 NAND gate
 X-NOR 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

 1 Khz
 2 Mhz
 8 Mhz
 2 Khz

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