UNIT 06. DIGITAL LOGIC AND DESIGN - MCQs - Computer Science For Class X

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Computer Science For Class X
Unit 04: Control Structure
Multiple Choice Questions And Fill In The Blanks

By Mrs. Ayesha Arif
Vice Principal
(Jauhar Progressive School)

Multiple Choice Questions (MCQs)

A. ENCIRCLE THE CORRECT ANSWER:
1. The Universal gate is:
a) NAND gate ✓
b) AND Gate
c) OR Gate
d) None of these

2. The _________ is inverter.
a) AND
b) OR Gate
c) NOT ✓
d) None of these

3. In Boolean Algebra, the bar sign (-) indicates __________.
a) OR Operation
b) NOR Operation
c) NOT Operation ✓
d) Both b and c

4. The Boolean Algebra is used for _____________.
a) Creating Circuits
b) Apply 12 rules of Boolean
c) Simplify the Boolean expression ✓
d) Differentiate the gates

5. With the combination of three variables, how many outputs are expected altogether?
a) Three
b) Six
c) Eight ✓
d) Nine

6. A + A = A is a ________ rule of Boolean Algebra.
a) 3^rd
b) 6^th
c) 5^th ✓
d) 7^th

7. A.A = 0 is a _________ rule of Boolean Algebra.
a) 1^st
b) 8^th ✓
c) 6^th
d) 10^th

8. Simplify form of Boolean expression of ABC + ABC + AB is _________.
a) A
b) B ✓
c) C
d) B

9 .Simplify form of Boolean expression of ABC+ABC is:
a) AC
b) BC ✓
c) B
d) A

10. Boolean expression of the given circuit is:

a) A + B
b) B.A
c) A.B
d) A.B ✓

FILL IN THE BLANKS:
1. Data Representation refers to the form in which data is stored, processed, and transmitted.
2. Digital devices such as smart phones, iPods, and computers store data in digital formats that can be handled by electronic circuitry.
3. Logic Gates are the electronic circuits in a digital system.
4. Logical Gates perform logical operations like AND, OR, NOT, NAND, NOR etc.
5. The logic gate is the basic unit of digital logic circuits.
6. There are mainly three basic gates AND, OR, and NOT.
7. The basic logical gates perform AND, OR, and NOT operations in the digital system.
8. An AND gate is a digital circuit that has two or more inputs and a single output AND gate operates on logical multiplication rules.
9. Boolean Expression of AND gate: Y=A.B
10. An OR gate is a digital circuit that has two or more inputs and a single output.
11. OR gate operates on logical Addition rules.
12. Boolean expression of OR gate is Y=A+B.
13. A NOT gate is a digital circuit that has a single input and a single output.
14. NOT gate is also known as INVERTER.
15. Universal Gates are logic gates.
16. Universal Gates are capable of implementing any Boolean function without requiring any other type of gate.
17. There are two types of universal gates.
18. A NAND Gate could be construct by connecting a NOT Gate at the Output terminal of the AND Gate.
19. Boolean expression of NAND gate is Y= (A.B)'or Y = AB.
20. A NOR Gate could construct by connecting a NOT Gate at the output terminal of the OR Gate.
21. The Boolean expression of NOR gate is Y = (A + B)' or Y = A + B.
22. The Boolean arithmetic rules are pre-defined rules that help to simplify the logical expression.
23. There are 12 Boolean algebra rules.



Source: Special Thanks To Sir Syed Arif Ali