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Digital Electronics

Digital Electronics
Which number system has a base of 16

 Decimal
 Octal
 Hexadecimal
 None

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Digital Electronics
Why generic array logic (GAL) device was invented ?

 One-time programmable
 Mask programmable
None of these
 Reprogrammable

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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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Digital Electronics
The fast logic family is

  ECL.
  TRL.
  DRL.
  TTL.

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Digital Electronics
A bubbled NAND gate is equivalent to a

 NAND gate
 X-OR gate
 NOR gate
 OR gate

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Digital Electronics
Which of the following is known as a mod-2 adder?

 NOR gate
 X-NOR gate
 X-OR gate
 NAND gate

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