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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

 1001
 0011
 1100
 1000

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

 OR
 NAND
 X-OR
 AND

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Digital Electronics
When will be the output of an AND gate is HIGH if there are three inputs, A, B, and C ?

 A = 1, B = 1, C = 1
 A = 1, B = 1, C = 0
 A = 0, B = 0, C = 0
 A = 1, B = 0, C = 1

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Digital Electronics
Which type of CPLD packaging can provide maximum number of pins on the package due to small size of the pins?

BGA
PLCC
PGA
QFP

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Digital Electronics
The parity of the binary number 11011001 is

 not known
 same as the number of zeros
 odd
 even

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Digital Electronics
The maximum positive and negative numbers that can be represented in one’s complement using n-bits are respectively

 +(2n-1-1),-2n-1
 None of these
 +2n-1,-(2n-1-1)
 +(2n-1-1),-(2n-1-1)

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