Dr.A.P.J.Abdul Kalam University
Bachelor of Computer Application
Third Semester Main Examination, Dec-2020
Digital Computer Electronics [BCA303T]
Time: 3:00 Hrs
Max Marks 50
Note : Attempt all questions. All questions carry equal marks.
Q.1 Explain with examples 1's and 2's complement method.
OR
Write short note on-
(iv) Binary number system
(v) Hexadecimal number system
Q.2 Explain De-Morgan's theorem.
OR
Define half adder and full adder.
Q.3 (i) What do you mean by K-map?
(ii) Construct a truth table for OR gate.
OR
(i) Explain min-term and max-term.
(ii) Write a Short note on "SOP"
Q.4 Explain with diagram- (any three)
(i) Multiplexer
(ii) De multiplexer
(iii) Encoder
(iv) Decoder
(v) Circuit
Q.5 What are counters? Explain synchronous counters.
OR
Explain flip- flop briefly explain J-K flip-flop.
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