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Digital Electronics

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

 0
 4
 2
 1

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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 2’s complement is used to represent the numbers, then the range will be

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

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Digital Electronics
What logic function is produced by adding an inverter to each input and output of an OR gate?

 NAND
 NOR
 X-OR
 AND

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Digital Electronics
The data bus width of a ROM of size 2048 × 8 bits is

 10
 8
 16
 12

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Digital Electronics
11001, 1001 and 111001 correspond to the 2’scomplement representation of the following set of numbers

 -6, -6 and -6 respectively
 -25, -9 and -57 respectively
 25, 9 and 57 respectively
 -7, -7 and -7 respectively

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Digital Electronics
Which of the following memories uses one transistor and one capacitor as basic memory unit

 DRAM
 Both SRAM and DRAM
 SRAM
 None

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