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Digital Electronics

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
What logic function is produced by adding inverters to the inputs of an OR gate?

 AND
 NOR
 X-NOR
 NAND

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Digital Electronics
Why decoder is used in the digital electronics ?

 It is used to separate address bus and data bus
 To convert non coded information into coded form
 To convert coded information into non coded form
None of these

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Digital Electronics
Which of the following codes is known as the 8421 code?

 ASCII code
 Gray code
 XS-3 code
 BCD code

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

 one
 four
 two
 three

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Digital Electronics
Which of the following logic circuits is the fastest ?

 TTL.
 All have same speed.
 DTL.
 RTL.

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