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Digital Electronics

Digital Electronics
Which of the following is known as a mod-2 adder?

 X-OR gate
 NAND gate
 X-NOR gate
 NOR gate

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

 Both SRAM and DRAM
 SRAM
 None
 DRAM

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Digital Electronics
The maximum positive and negative numbers which can be represented in two’s complement form using n bits are respectively,

 +2n-1,-(2n-1+1)
 +(2n-1-1),-2n-1
 +2n-1,-2n-1
 +(2n-1-1),-(2n-1-1)

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Digital Electronics
A boolean function can be transformed into logical ________.

 graph
 diagram
 map
 matrix

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

 Output is inverted
None of these
 Tristate
 Open collector output

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Digital Electronics
Why generic array logic (GAL) device was invented ?

 Reprogrammable
None of these
 One-time programmable
 Mask programmable

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