This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates – Quiz 27 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 27 (22 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In boolean algebra, which operation does putting a bar above a letter represent? A) NOT. B) AND. C) OR. D) None of the above. Show Answer Correct Answer: A) NOT. 2. What is the output of the following boolean expression in Java:System.out.println(5 != 5)? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 3. Benjamin is learning about digital circuits in his electronics class. His teacher asks him:How many fundamental operations are there in Boolean Algebra? A) One. B) Two. C) Three. D) Four. Show Answer Correct Answer: C) Three. 4. Evaluate:20<=20 and 20>=20 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 5. When the result of any logical statement or expression is always TRUE or 1, it is called ..... A) Boolean False. B) Fallacy. C) Boolean True. D) Tautology. Show Answer Correct Answer: D) Tautology. 6. Identify the logic gate also called an inverter. A) NAND. B) NOT. C) NOR. D) AND. Show Answer Correct Answer: B) NOT. 7. What is the significance of the identity law in Boolean algebra? A) The identity law allows simplification of Boolean expressions and is essential in digital circuit design. B) The identity law is used to create complex Boolean expressions. C) The identity law is only applicable in arithmetic operations. D) The identity law has no impact on digital circuit design. Show Answer Correct Answer: A) The identity law allows simplification of Boolean expressions and is essential in digital circuit design. 8. Decide if the boolean expression evaluates to true or false. Given:a = 1, b = 0, c = 3a == b A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 9. What is the result of the Boolean expression A AND (A' OR B)? A) A. B) B. C) A OR B. D) A'. Show Answer Correct Answer: A) A. 10. At which clock period does a D-type flip flop change A) Falling Edge. B) Clock Width. C) Clock Period. D) Rising Edge. Show Answer Correct Answer: D) Rising Edge. 11. Which of the following is FALSE about the NOT gate? A) Output of NOT is complementary to the input. B) When the input to NOT gate is 0, the output is 1. C) A NOT gate has two input signals and an output signal. D) None of the above. Show Answer Correct Answer: C) A NOT gate has two input signals and an output signal. 12. AND Gate:IF A and B are ON, C would light up? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. ..... operate on statements that are true or false. A) Arithmetic operations. B) Logical operations. C) All the above. D) None of the above. Show Answer Correct Answer: B) Logical operations. 14. A + (B + C) = A) (A + B) + C. B) C * A. C) B + C. D) A * C. Show Answer Correct Answer: A) (A + B) + C. 15. For the AND Boolean operation, the output is only true if ..... A) One input is true. B) One input is false. C) Both inputs are true. D) Both inputs are false. Show Answer Correct Answer: C) Both inputs are true. 16. Give dual for the following:-XY+XY'+X'Y A) (X'+Y')+(X'+Y)+(X+Y'). B) (X+Y).(X+Y').(X'+Y). C) (X+Y)+(X+Y')+(X'+Y). D) (XY)+(XY')+(X'Y). Show Answer Correct Answer: B) (X+Y).(X+Y').(X'+Y). 17. The choices of an if statement are called: A) Twigs. B) Branches. C) Leaves. D) Trees. Show Answer Correct Answer: B) Branches. 18. What does the commutative law imply for Boolean algebra? A) A + B = B + A and A . B = B . A. B) A + A = A. C) AB + AC = A(B + C). D) A + 0 = 0. Show Answer Correct Answer: A) A + B = B + A and A . B = B . A. 19. X . ( Y . Z ) is the same as:(Hint:Associative Law) A) X . Y + Z. B) ( X + Y ) + Z. C) ( X . Y ) . Z. D) ( X . Z ) + Y. Show Answer Correct Answer: C) ( X . Y ) . Z. 20. NOT gate output is A) Same as input. B) Inverted input. C) Always 1. D) Always 0. Show Answer Correct Answer: B) Inverted input. 21. What does the NOT gate do to its input? A) Requires both inputs to be true. B) Combines two inputs. C) Reverses the input. D) Requires at least one true input. Show Answer Correct Answer: C) Reverses the input. 22. Add the binary numbers together 1101 + 1001 A) 11011. B) 11110. C) 10110. D) 00111. Show Answer Correct Answer: C) 10110. ← PreviousRelated QuizzesClass 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 1Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 2Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 3Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 4Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 5Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 6Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 7Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 8Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 9Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books