Semester : SEMESTER 1
Subject : Digital Fundamentals
Year : 2016
Term : DECEMBER
Branch : MCA
Scheme : 2016 Full Time
Course Code : RLMCA 109
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Reg. No. Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER REGULAR MCA DEGREE EXAMINATION, DEC 2016
Course Code: RLMCA109
Course Name: DIGITAL FINDAMENTALS
Max. Marks: 60 Duration: 3 Hours
PARTA
Answer All Questions
Each question carries 3 marks
1. Perform the following binary operations using the given unsigned numbers.
a. 11011100.011 + 100111.11
b. 11101 +101
2. Simplify the Boolean expression (ABC) + (ABC)
3. Which gates are called universal gates? Why it is called so?
-
What is a demultiplexer? Discuss the differences between a demultiplexer and a
decoder.
What is parity generator and checker?
What is a Flip Flop? Why is it called a bistable multivibrator?
What is a register?
9० > உ nm
What is a shift register? Can a shift register be used as a counter? If Yes how?
PARTB
Answer any one question from each module. Each question carries 6 marks
9. How can you represent single precision floating point numbers? Give example.
Or
10. Represent the following decimal numbers in 8bit 1’s complement and 8bit 5
complement form.
1 24 ii. -90 iv. 100 (3 x 2)
11. Minimize the following logic function using K-maps and realize using two input
NAND gates.
F(A,B,C,D) =)'m(1,3,5,8,9,11,15) + d(2,13)
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