1

GATE ECE 2016 Set 1

MCQ (Single Correct Answer)

+2

-0.6

In an 8085 system, a PUSH operation requires more clock cycles than a POP operation. Which one of the following options
is the correct reason for this?

2

GATE ECE 2014 Set 4

MCQ (Single Correct Answer)

+2

-0.6

An 8085 microprocessor executes “STA 1234H” with starting address location 1FFEH (STA copies the contents of the
Accumulator to the 16-bit address location). While the instruction is fetched and executed, the sequence of values written
at the address pins $${A_{15}}$$ − $${A_{8}}$$ is

3

GATE ECE 2011

MCQ (Single Correct Answer)

+2

-0.6

An 8085 assembly language program is given below. Assume that the carry flag is initially unset. The content of the accumulator after the execution of the program is

MVI A,07H

RLC

MOV B,A

RLC

RLC

ADD B

RRC

MVI A,07H

RLC

MOV B,A

RLC

RLC

ADD B

RRC

4

GATE ECE 2010

MCQ (Single Correct Answer)

+2

-0.6

For the 8085 assembly language program given below, the content of the accumulator after the executions of the program is

3000 MVI A, 45H

3002 MOV B, A

3003 STC

3004 CMC

3005 RAR

3006 XRA B

3000 MVI A, 45H

3002 MOV B, A

3003 STC

3004 CMC

3005 RAR

3006 XRA B

Questions Asked from Instruction Set and Programming with 8085 (Marks 2)

Number in Brackets after Paper Indicates No. of Questions

GATE ECE Subjects

Signals and Systems

Representation of Continuous Time Signal Fourier Series Discrete Time Signal Fourier Series Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Transmission of Signal Through Continuous Time LTI Systems Discrete Time Linear Time Invariant Systems Sampling Continuous Time Signal Laplace Transform Discrete Fourier Transform and Fast Fourier Transform Transmission of Signal Through Discrete Time Lti Systems Miscellaneous Fourier Transform

Network Theory

Control Systems

Digital Circuits

General Aptitude

Electronic Devices and VLSI

Analog Circuits

Engineering Mathematics

Microprocessors

Communications

Electromagnetics