I INTERNAL TEST - DIGITAL ELECTRONICS - 7BPH6C2
TIME: 2 Hrs TOTAL: 50 Marks
Part A - 5 x 2 = 10 Marks
1. Convert 10234 in decimal into hexadecimal.
2. Express decimal number 6754 in BCD.
3. Write first 10 Gray code numbers in order.
4. Simplify the Boolean expression Y = A(A+B)
5. What's the difference between a truth table and a Karnaugh map?
Part B - 4 x 5 = 20 Marks
6. State and Prove Demorgan's Theorems.
7. Give the Symbols and Truth Tables for XOR and XNOR gates.
8. How Half Adder adds two bits at a time? Explain with truth table.
9. Simplify Y = ∑m(10,11,12,13,14,15) using K-Map method.
Part C - 2 x 10 = 20 Marks
10. Explain how NOR gate can be used as a universal building block.
11. Simplify using K-Map Y = f(A,B,C,D) = ∑m(1,3,7,11,15) + ∑d(0,2,5,8)