Time : 3 hrs
Model Question Paper
DSCO10 – MICROPROCESSOR AND PROGRAMMING
Maximum marks : 75
Instruction:
1.
Question paper is divided into Group A, Group B and Group C
2.
Each Group is 25 Marks
3.
Figure to the right in bracket indicates marks.
4.
Good Handwriting is expected
5.
Assume suitable data if necessary.
Group A (25 Marks)
Answer any three questions (Question 1 is compulsory)
Q.1.
Q.2.
Q.3.
Q.4.
Q.5:
Explain Data Bus and ADD BUS of 8085
Explain buffer with example
Explain any two data transfer Instructions.
Explain Stack of 8085
Explain AND, OR, RRC, RAL ,ADD
(05)
(10)
(10)
(10)
(10)
Group B (25 Marks)
Answer any three questions (Questions 6 is compulsory)
Q.6. Store one data in Register B and other data in Register D. Add these two data and store
result in Register E. Show the status of Flag Reg.
(05)
Q.7. Store 24H in memory location 2050 H and convert it into 42 H, then store it into 2051 H.
Q.8. Divide 08 H By 04H with logical instructions and store Result in Register E.
(10)
Q.9. ADD 01H to 05H Numbers and store Result in Register B. Use Stack.
(10)
Q.10. Draw the Pin diagram of 8085 and explain the function of each pin.
(10)
Group C (25 Marks)
All Questions are Compulsory.
Q.11 Fill in the blanks ( each question carry 2 marks)
1. The 8085 accumulator is a __________ bit register .
2. In 8085 the parity flag is set to ________ if an instruction or logic instruction generates answer
with even parity .
3. In 8085 has total ____________ number of general purpose registors.
4. In 8085 stack pointer is ____________ bit register .
5. During the fetch cycle the op code of an instruction is stored in ___________ register.
Q.12 Multiple choices Question (Each question carries 2 marks)
1. The content of the accumulator and the flag register are called as
a. PSH
b. PSW
c. PSP
d. None of these
2. In 8085 stack pointer is a ________ bit.
a. 8
b. 16
c. 32
d. None
3. 8085 has SID pin where SID refers to
1
a. Serial interrupt data
c. Serial Interrupt decoder
4. _________ RAM is made up of flip-flops.
a. Static
c. Erasable
5. To store the accumulator we use
a. LDA
c. MOV
b. Serial Input data
d. Second Input data
b. Dynamic
d. None
b. STA
d. None
Q.13 True or false (each question carry 1 marks).
1. An encoder has a number of input lines only one of which is activated at a given time .
2. A decoder is a combinational circuit that converts binary information from N inputs lines
to a maximum of N2 unique output lines.
3. Demultiplexing means transmitting a large number of information units over a small number of
lines.
4. 1:16 demultiplexing is not possible.
5. IN and OUT are two Input and output instruction in 8085.
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