M.C.A. (Semester (CBCS) Examination Mar/Apr-2018
Science
DIGITAL CIRCUITS AND MICROPROCESSORS
Time: 2½ Hours
Max. Marks: 70
Instructions: Question No. 1 and 2 are compulsory. Attempt any 3 questions from Q. no. 3 to Q. no. 7 Figures to the right indicate full marks.
Q.1

Choose correct alternatives.
10
Demultiplxer is circuit which has
Many one O/P
Many Many O/P
One Many O/P
None of these
To remove race around condition if F/F is used.
RS
JK
T
MS JK
In IC 7404 NOT gates are designed.
3
4
6
8
In Full Adder Gate gives carry.
AND
OR
NOT
NAND
The 8086 microprocessor has byte pipeline are used.
3
4
6
8
The memory capacity for 8085 microprocessor is
32 K
64 K
128 K
16 K
In arithmetic operation in 8085 microprocessor, result always stored in Register.
Acc
B
Source
None of these
The Half adder has Input.
2
3
1
4
In 8086 microprocessor Flag registers are used.
2
3
1
9
10) A 1
0
1
A
None of theses
B)State True or False
04
In sequential circuit memory are used to store the last condition result.
OR gate is a complimentary gate.
The data bus for 8085 is a 8 bit.
HLT is data transfer instruction.
Q.2
a)Define counter? Explain combined 3 bit asynchronous Counter.
08
b)Explain universal adder/ subtractor.
06
Q.3
a)Explain all types of gates with its logic symbol, logical expression and truth table.
08
b)State and explain different type of addressing mode in 8085 microprocessor
06
Q.4
a)Define Shift register? Give different types. Explain any two types in brief.
08
b)Explain maximum mode for 8086 microprocessor.
06
Q.5
a)Give different type of instruction of 8085. Explain each type with suitable example.
08
b)Explain flag registers in 8086.
06
Q.6
a)Draw the internal architecture of 8086. Explain BIU section in brief.
08
b)Explain different types of K map with suitable example.
06
Q.7
a)Define F/F. Explain RS, T and D F/F.
08
b)Explain decoder.
06