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1
GATE ECE 2004
MCQ (Single Correct Answer)
+2
-0.6
It is desired to multiply the numbers 0AH by 0BH and store the result in the accumulator. The numbers are available in registers B and C respectively. A part of the 8085 program for this purpose is given below:
MVI A, 00H
LOOP:.........
...............
HLT END

The sequence of instruction to be complete the program would be

A
JNZ LOOP, ADD B, DCR C
B
ADD B, JNZ LOOP, DCR C
C
DCR C, JNZ LOOP, ADD B
D
ADD B, DCR C, JNZ LOOP
2
GATE ECE 2004
MCQ (Single Correct Answer)
+2
-0.6
Consider the sequence of 8085 instructions given below.
LXI H, 9258
MOV A, M
CMA
MOV M, A
Which one of the following is performed by this sequence?
A
contents of location 9258 are moved to the accumulator.
B
contents of location 9258 are compared with the contents of the accumulator.
C
contents of location 9258 are complemented and stored in location 9258.
D
contents of location 5892 are complemented and stored in location 5892.
3
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
In an 8085 microprocessor, the instruction CMP B has been executed while the content of the accumulator is less than that of register B. As a result
A
Carry flag will be set but Zero flag will be reset
B
Carry flag will be reset but Zero flag will be set
C
Both Carry flag and Zero flag will be reset
D
Both Carry flag and Zero flag will be set
4
GATE ECE 2002
MCQ (Single Correct Answer)
+2
-0.6
Consider the following assembly language program. GATE ECE 2002 Microprocessors - Instruction Set and Programming with 8085 Question 18 English The execution of the above program in an 8085 microprocessor will result in
A
an output of 87H at port 1
B
an output of 87H at port 2
C
infinite looping of the program execution with accumulator data remaining at 00H.
D
infinite looping of the program execution with accumulator data alternating between 00H and 87H
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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
State Equations For Networks Network Elements Network Theorems Two Port Networks Transient Response Sinusoidal Steady State Response Network Graphs Miscellaneous
Control Systems
Signal Flow Graph and Block Diagram Time Response Analysis Compensators Basic of Control Systems Frequency Response Analysis Stability Root Locus Diagram State Space Analysis
Digital Circuits
Logic Gates Boolean Algebra Analog to Digital and Digital to Analog Converters Sequential Circuits Combinational Circuits Logic Families Number System and Code Convertions Semiconductor Memories
General Aptitude
Numerical Ability Verbal Ability
Electronic Devices and VLSI
PN Junction Semiconductor Physics IC Basics and MOSFET BJT and FET
Analog Circuits
Bipolar Junction Transistor FET and MOSFET Oscillators Operational Amplifier 555 Timer Frequency Response Diodes Feedback Amplifier Power Amplifier
Engineering Mathematics
Linear Algebra Calculus Vector Calculus Complex Variable Probability and Statistics Differential Equations Numerical Methods Transform Theory
Microprocessors
Instruction Set and Programming with 8085 Pin Details of 8085 and Interfacing with 8085
Communications
Fundamentals of Information Theory Noise In Digital Communication Analog Communication Systems Digital Communication Systems Random Signals and Noise
Electromagnetics
Waveguides Antennas Miscellaneous Transmission Lines Maxwell Equations Uniform Plane Waves
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