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Digital Electronics

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

 Gray code
 ASCII code
 BCD code
 XS-3 code

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Digital Electronics
A half adder is a ________ circuit.

 None
 Combinational
 Both A and B
 Sequential

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Digital Electronics
AND-OR realization of a combinational circuit is equivalent to

 NOR-NAND realization
 NAND-NOR realization
 NAND-NAND realization
 NOR-NOR realization

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Digital Electronics
OR operation is equivalant to

 Union
 Both B and C
 Division
 Intersection

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Digital Electronics
ASCII and EBCDIC codes are

 alphanumeric codes
 error correcting codes
 numeric codes
 BCD codes

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Digital Electronics
It is desired to have a 64 × 8 ROM. The ROMs available are of 16 × 4 size. The number of ROMs required will be

 6
 8
 2
 4

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