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Digital Electronics

Digital Electronics
A device which converts BCD into octal is called

 demultiplexer
 decoder
 encoder
 code converter

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Digital Electronics
A 16-square eliminates

 8 variables
 2 variables
 3 variables
 4 variables

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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

 sequential codes
 BCD codes
 self-complementing codes
 cyclic codes

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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
 11100000
 011100001
 10101111

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Digital Electronics
For the design of a combinational circuit with four inputs using only NAND gates, the number of K-maps required for the simplification process is

 1
 2
 4
 0

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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 255
 -256 to 256

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