Which of the following codes is a sequential code?

A)
8421 code
B)
5421 code
C)
2441 code
D)
2421 code

Correct Answer : Option (A) :   8421 code

Explanation : A sequential code is a code where each succeeding code is one binary number more than the preceding code. Thus, 8421 is a sequential code. Sequential codes are useful in manipulating mathematical data.

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Two 16 : 1 and one 2 : 1 multiplexers can be connected to form a
A)
8 : 1 multiplexer
B)
16 : 1 multiplexer
C)
32 : 1 multiplexer
D)
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?
A)
RST 5.5
B)
RST 6.5
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D)
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