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Digital Electronics

Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 2:1
 1:2
 1:1
 2:3

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Digital Electronics
Odd parity of a bit stream can be tested using ________ gate.

 AND
 NOR
 XOR
 OR

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Digital Electronics
Maximum number in decimal that can be represented by 4 bits (binary) is

 15
 16
 4
 7

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Digital Electronics
Which of the logical operations is represented by the + sign in Boolean algebra ?

 NAND
 OR
 NOT
 AND

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Digital Electronics
Fastest memory element is

 RAM
 Cache
 Hard Drive
 ROM

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Digital Electronics
The number A = 01110000 and B = 10101111 are in 2’s complement form .Addition of above two number is

 00011111
 10101111
 011100001
 11100000

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