23-09-2013, 04:49 PM
Electrical and Electronics Engineering 1st Unit Question bank
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2 Marks
1. Convert hexadecimal number 68 BE to binary and octal.
2. Find the 1’s and 2’s complement of 00000000.
3. Simplify: x+x’y.
4. What is the difference between decoder and demultiplexer?
5. What is meant by latches and flip-flops?
6. For the given circuit, derive thealgebraic expression in SOP form:
7. Why digital circuits are more frequently constructed with NAND and NOR gates than
with AND and OR gates?
8. Distinguish between completely specified function and incompletely specified
function.
9. Simplify the Boolean function F = (A + (BC)’)’
10. Minimize the expression using Boolean theorems F= x’y’ + x’yz + xz + xyz’. Draw
the logic diagram for the minimized function.
11. If A and B are Boolean variables and if A= 1 and (A+B)’ = 0, find B.
12. Realize the function F (A, B) = A’B + AB’ using NAND gates only.
13. How many inputs and gates are required for the expression W = AB’D + ACD’ + EF
14. Name two canonical forms of Boolean algebra.
15. What is Data Selector in Multiplexer And Demultiplexer?