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Digital Electronics

Digital Electronics
Which one of the following is an invalid state in 8-4-2-1 binary coded decimal counter

 1000
 1001
 0011
 1100

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Digital Electronics
The boolean algebra is mostly based on

 Standard theorem
 Boolean theorem
 De Morgans theorem
 De Morpans theorem

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

 One-time programmable
 Mask programmable
None of these
 Reprogrammable

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Digital Electronics
2's Complement of 10101011 is

 10101100
 00111100
 01010101
 10101011

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Digital Electronics
An 8 × 4 ROM contains a decoder of size

 8 × 8
 3 × 4
 3 × 8
 8 × 4

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Digital Electronics
An OR gate has 6 inputs. The number of input words in its truth table are

6
128
64
32

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