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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
 2:3
 1:1

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Digital Electronics
Why small bubble is given on the output of the NAND gate symbol ?

 Open collector output
 Output is inverted
None of these
 Tristate

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Digital Electronics
Unit distance code is the other name of

 cyclic code
 XS-3 code
 sequential code
 self-complementing code

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Digital Electronics
A computer has a word length of 8 bits (including sign). It is required to determine the range of integers that can be stored in the computer. If 1’s complement is used to represent the numbers, then the range will be

 -127 to 127
 -128 to 127
 -256 to 256
 -256 to 255

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Digital Electronics
Queue is also known as

 FIFO memory
 Flash memory
 LILO memory
 LIFO memory

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Digital Electronics
The set of which logic gates is designated as universal gate?

 XNOR, NOR, NAND.
  NOR , NAND.
 XNOR, NOR, NAND.
 NOT, OR , AND.

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