Rajasthan Technical Education Second Year Paper 2016 Basics of Digital Electronics

Rajasthan Technical Education Second Year Paper 2016 Basics of Digital Electronics

Which of the following is an invalid BCD code ?
(a) 0011
(b) 1101
(c) 0101
(d) 1001

Digital electronics is based on the _________number system
(a) Decimal
(b) Octal
(c) Binary
(d) Hexadecimal

The 1’s complement of 10011101 is _________
(a) 01100010
(b) 10011110
(c) 01100001
(d) 01100011

What is base of Hexa-decimal System ?
(a) Eight
(b) Sixteen
(c) Ten
(d) Two

The output of an AND gate is HIGH when input of A,B,C ________
(a) A=1 B=1 C=0
(b) A=0 B=0 C=0
(c) A=1 B=1 C=1
(d) A=1 B=0 C=1

The output of a NOR gate is High if ________
(a) all inputs are High
(b) any inputs is High
(c) any inputs is Low
(d) all in puts are Low

The Boolean expression for a 3-input AND gate is
(a) X=AB
(b) X=ABC
(c) X=A+B+C
(d) X=AB+C

Which of the following a universal gate
(a) AND gate
(b) OR gate
(c) NOR gate
(d) EX-OR gate

Most TTL logic used today is some form of
(a) Schottky TTL
(b) Tristate TTL
(c) Low Power TTL
(d) Open-Collector TTL

Which is not part of ECL ?
(a) Differential amplifier
(b) Bias circuit
(c) Emitter-follower circuit
(d) Totem-Pole circuit

How many data select lines are required for selecting eight input line ?
(a) 1
(b) 2
(c) 3
(d) 4