Guru Gobind Singh Indraprastha Vishwavidyalaya 2005 B.C.A Computer Application Digital Electronics - Question Paper

END-TERM exam
SECOND SEMESTER [BCA] - MAY 2005
Paper Code: BCA106 Subject: Digital Electronics

Time : three Hours Maximum Marks : 75

Note: Attempt any 5 ques..

Q.1 (a) Simplify the subsequent 4 variable formula. (8)
K = f(A, B, C) = p (1, 2, 3, 9, 12, 14)
(b) obtain the DeMorgan equivalent to subsequent equations: (7)
F = XYZ + XZ + X’Y’ + YZ

Q.2 (a) Design a full subtractor using 3.8 decoder and OR Gates. (8)
(b) Design a carry-look ahead adder circuit and discuss it. (7)

Q.3 (a) Design Binary-to-Gray code converter. (8)
(b) Design a Binary multiplier Circuit. (7)

Q.4 (a) Design a J-K flip-flop using NAND gate and discuss it. (8)
(b) discuss Race-Around condition. explain the technique to
avoid race around condition. (7)

Q.5 (a) discuss parallel- in-serial out shift Resister in detail. (8)
(b) discuss Bi-directional shift Register. (7)

Q.6 (a) Design a Decode Counter. (8)
(b) Des ign a 4-Bit up-down Counter. (7)

Q.7 Write a short notes (any three): - (15)
(a) RTL
(b) TTL
(c) DTL
(d) CMOS Logic

Earning:   Approval pending.