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Digital Electronics

Digital Electronics
The hex address of the 256th memory location is

 00FFF
 001FF
 000FF
 00100

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Digital Electronics
Which of the following operations is commutative but not associative?

 X-OR
 OR
 AND
 NAND

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Digital Electronics
In which code do the successive code characters differ in only one position?

 8421 code
 Hamming code
 XS-3 code
 Gray code

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Digital Electronics
Dual slope ADC has R = 1 KΩ and C = 0.22 nanofarad has charging and discharge times for some voltage is 9 ns and 3 ns respectively. The reference Voltage is 2.2 V. What is the peak voltage reached by triangular wave during charging?

 90 mV.
 300 mV.
 900 mV.
 30 mV.

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Digital Electronics
In the boolean algebra, a variable has ________ different state(s)/value(s).

 4
 2
 3
 1

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Digital Electronics
A gate is enabled when its enable input is at logic 1. The gate is

 none of these
 NOR
 OR
 NAND

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