An 8 bit transistor register has output voltage of low-high-low-high-low-high-low-high. The decimal number stored is

Electronics and Communication Engineering (ECE) : Digital Electronics - Quiz(MCQ)

105

115

Correct Answer : Option (A) : 85

Explanation : 01010101 in binary and 64 + 16 + 4 + 1 = 85 in decimal.

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Two 16 : 1 and one 2 : 1 multiplexers can be connected to form a

8 : 1 multiplexer

16 : 1 multiplexer

32 : 1 multiplexer

64 : 1 multiplexer

Correct Answer : 32 : 1 multiplexer

If interrupt service request have been received from all of the following interrupts, then which one will be serviced last?

RST 5.5

RST 6.5

RST 7.5

None of the above

Correct Answer : RST 5.5

Which liquid crystal is used for LCD display?

Mercury

Aqua regia

Liquid boron

Pneumatic fluid

Correct Answer : Pneumatic fluid