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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?

 1:2
 1:1
 2:3
 2:1

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

 Gray code
 BCD code
 ASCII code
 XS-3 code

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Digital Electronics
AND operation of (79)10 & (-56)10 is

 48H
 08H
 50H
 42H

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Digital Electronics
The fan put of a 7400 NAND gate is

2TTL
10TTL
8TTL
5TTL

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Digital Electronics
A 32 × 10 ROM contains a decoder of size

 5 × 32
 10 × 32
 32 × 10
 32 × 32

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Digital Electronics
What will be Excess - 3 code for decimal ( 584 )?

  (1000 1011 0111).
 (1011 0111 1000).
  (0111 0100 1000).
 (1000 0111 1110).

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