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Digital Electronics

Digital Electronics
A bubbled NAND gate is equivalent to a

 X-OR gate
 OR gate
 NOR gate
 NAND gate

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Digital Electronics
The codes in which each successive code word differs from the preceding one in only one bit position are called

 self-complementing codes
 cyclic codes
 sequential codes
 BCD codes

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Digital Electronics
Which one of the following is 2’s complement of -68?

 10111100
 11000100
 00111100
 01111100

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Digital Electronics
The AND-OR realization of a combinational circuit requires three 3-input AND gates and one 3-input OR gate. This circuit can be designed using

 three 3-input OR gates and one 3-input AND gate
None of these
 four input NAND gates only
 three 3-input NAND gates and one 3-input NOR gate

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Digital Electronics
In Boolean algebra, OR is represented by

 -
 ×
 /
 +

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Digital Electronics
A group of four bits is known as

 Bit
 Byte
 Nibble
 Word

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