Time : 3 hrs Max Marks : 75
Part A
Answer any ten questions.
1. Explain the concept of base of a number system. Give examples. What is the significance of binary number system in designing computer memory?
2. Explain the significance of complements in binary number system. Distinguish between 1’s complement and 2’s complement.
3. State and prove De-Morgan’s theorem.
4. Write short note on BCD number system using the principle of BCD addition, perform 26 + 37
5. Write short note on the concept of universal gates. Why NAND gate is called a universal gate/
6. Write short note on the Min terms and Max terms. What do you mean by SOP and POS?
7. What is a flip flop? Why flip flops are considered to be the building block of computer memory?
8. With the help of a neat diagram, explain the working of an RS flip flop.
9. Explain the concept of half adders, explain the need for full adder.
10. What is a register? Explain different methods of data input to registers.
11. Compare and contradict synchronous and asynchronous counters.
12. Explain the concept of parity in data transfer. (3x 10 = 30 marks)
2. Explain the significance of complements in binary number system. Distinguish between 1’s complement and 2’s complement.
3. State and prove De-Morgan’s theorem.
4. Write short note on BCD number system using the principle of BCD addition, perform 26 + 37
5. Write short note on the concept of universal gates. Why NAND gate is called a universal gate/
6. Write short note on the Min terms and Max terms. What do you mean by SOP and POS?
7. What is a flip flop? Why flip flops are considered to be the building block of computer memory?
8. With the help of a neat diagram, explain the working of an RS flip flop.
9. Explain the concept of half adders, explain the need for full adder.
10. What is a register? Explain different methods of data input to registers.
11. Compare and contradict synchronous and asynchronous counters.
12. Explain the concept of parity in data transfer. (3x 10 = 30 marks)
Part B
Answer All Questions
13. Convert the following (327.30)10 = ( )2 = ( )8 = ( )16OR
14. Using the principle of 1’s or 2’s complement perform
(i) (63)10 – (27)10
(ii) (36)10 – (68)10
(iii) (101101)2 – (10101)2
15 Simplify using K- map (i) Y = Σ (0,3,7,9,11,13)
m
(ii) Y = Σ (1,3,6,7,9,15) + Σ (2,8,12)
m d
OR
16. (i) State and prove distributive property of Boolean Algebra.
(ii) Draw the circuit diagram of XOR gates. How it is implemented using
NAND gates?
(iii) Explain the significance of duality theorem.
17. Explain the working of JK flip flops with a neat diagram. Explain its advantage over RS flip flop.
OR
18. (i) Write short notes on encoders and decoders.
(ii) Explain the working principle of multiplexers.
19. (i) Explain the need for registers. Explain the significance of MAR and MDR
in data storage.
(ii) Explain the organization of RAM by taking 64 K 8 bit system as an
example.
OR
20. (i) What are the important classification of read only memories?
(ii) Compare and contradict the working of SRAM and DRAM.
21. Explain the need for data transfer. What are the possible errors in data transfer? How hamming codes are useful in detection of errors in data transfer?
OR
22. What do you mean by A to D and D to A converters? Explain A to D converters
in detail with the help of a neat diagram
( 5x 9 =45 marks
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