Digital Circuits [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 252 - 254 of 271

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Question 252

Digital Circuits
Arithmetic Circuits, Code Converters, Multiplexers, Decoders and PLAs

Appeared in Year: 2017

Question

MCQ▾

Consider the circuit shown in figure.

The Boolean Expression F Implemented by the Circuit

The Boolean expression F implemented by the circuit is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 253

Digital Circuits
Boolean Algebra, Minimization of Functions

Appeared in Year: 2015

Question

MCQ▾

A function of Boolean variables X, Y and Z is expressed in terms of the min-terms as

Which one of the products of sums given below is equal to the function ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 254

Digital Circuits
Programming

Appeared in Year: 2016

Question

MCQ▾

In an system, a PUSH operation requires more clock cycles than a POP operation. Which one of the following options is the correct reason for this?

Choices

Choice (4)Response

a.

Order of registers must be interchanged for a PUSH operation, whereas POP uses their natural order.

b.

For POP, the data transceivers remain in the same direction as for instruction fetch (memory to processor) , whereas for PUSH their direction must be reversed.

c.

The stack pointer needs to be pre-decremented before writing registers in a PUSH, whereas a POP operation uses the address already in the stack pointer.

d.

Memory write operations are slower than memory read operation in an 8085 based system.

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