1
GATE ECE 2017 Set 1
MCQ (Single Correct Answer)
+1
-0.3
The clock frequency of an 8085 microprocessor is 5 MHz. If the time required to execute an instruction is 1.4 $$\mu $$s, then the number of T-states needed for executing the instruction is
A
1
B
6
C
7
D
8
2
GATE ECE 2016 Set 3
MCQ (Single Correct Answer)
+1
-0.3
In an 8085 microprocessor, the contents of the accumulator and the carry flag are A7 (in hex) and 0, respectively. If the instruction RLC is executed, then the contents of the accumulator (in hex) and the carry flag, respectively, will be
A
4E and 0
B
4E and 1
C
4F and 0
D
4F and 1
3
GATE ECE 2015 Set 2
MCQ (Single Correct Answer)
+1
-0.3
In an 8085 microprocessor, which one of the following instructions changes the content of the accumulator?
A
MOV B, M
B
PCHL
C
RNZ
D
SBI BEH
4
GATE ECE 2015 Set 3
MCQ (Single Correct Answer)
+1
-0.3
Which one of the following 8085 microprocessor programs correctly calculates the product of two 8-bit numbers stored in registers B and C?
A

MVI A, 00H
JNZ LOOP
CMP C
LOOP DCR B
HLT
B

MVI A, 00H
CMP C
LOOP DCR B
JNZ LOOP
HLT
C

MVI A, 00H
LOOP ADD C
DCR B
JNZ LOOP
HLT
D

MVI A, 00H
ADD C
JNZ LOOP
LOOP DCR B
HLT
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