This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. ..... ..... A . Bis the same as A) A + B. B) A . B. C) B . A. D) A . B. Show Answer Correct Answer: A) A + B. 2. Karnaugh map simplifies A) Hardware. B) Boolean expressions. C) Memory. D) Counters. Show Answer Correct Answer: B) Boolean expressions. 3. The commutative law of addition for two variables is written as A+B = ..... A) B+A. B) BA. C) B'A. D) BA'. Show Answer Correct Answer: A) B+A. 4. Which boolean expression can be used to check if someone is 18 years old or older? A) Age > 18. B) Age < 18. C) Age >= 18. D) Age <= 18. Show Answer Correct Answer: C) Age >= 18. 5. What is the purpose of a truth table in circuit design? A) The purpose of a truth table in circuit design is to represent the relationship between inputs and outputs for logical operations. B) To visualize the physical layout of a circuit. C) To determine the voltage drop across components. D) To calculate the total resistance in a circuit. Show Answer Correct Answer: A) The purpose of a truth table in circuit design is to represent the relationship between inputs and outputs for logical operations. 6. What is the hexadecimal representation of the decimal number 255? A) FF. B) FE. C) FF0. D) F0. Show Answer Correct Answer: A) FF. 7. Explain the meaning of a tautology in Boolean logic. A) Expression always false. B) Expression always true. C) Output depends on one input only. D) Output is random. Show Answer Correct Answer: B) Expression always true. 8. What is the correct Boolean expression for a circuit with an OR gate receiving inputs from an AND gate and a NOT gate? A) D = A OR B AND C. B) D = NOT A AND B OR C. C) D = A AND B OR NOT C. D) D = A AND B OR C. Show Answer Correct Answer: C) D = A AND B OR NOT C. 9. Which of the following expressions is in canonical SOP form? A) A + BC. B) A'B'C + AB'C'. C) A(A + B). D) AB + C. Show Answer Correct Answer: B) A'B'C + AB'C'. 10. The logic gate that outputs 1 only if an odd number of inputs are 1 is: A) NOR. B) NAND. C) XOR. D) AND. Show Answer Correct Answer: C) XOR. 11. Name the gate which produces output 1 when the input have odd number of 1's A) XNOR. B) XOR. C) OR. D) NAND. Show Answer Correct Answer: B) XOR. 12. / 5 <= 30 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 13. (C AND D) OR (NOT(A OR B)) = Q, If A=1, B=1, C=0 and D=1, what does Q equal? A) 0. B) 1. C) All the above. D) None of the above. Show Answer Correct Answer: A) 0. 14. The NOR gate output will be high if the two inputs are ..... A) 00. B) 01. C) 10. D) 11. Show Answer Correct Answer: A) 00. 15. According to Boolean laws:A+1=? A) 1. B) A. C) 0. D) $\overline{A}$. Show Answer Correct Answer: A) 1. 16. Samuel and Maya are working together on a project. In Boolean Algebra, what does the AND operation require for their project to be considered successful (output to be true)? A) At least one input is true. B) Both inputs are true. C) Both inputs are false. D) Only one input is false. Show Answer Correct Answer: B) Both inputs are true. 17. Boolean expression:an expression that evaluates to either true or false.(3 > 2) is A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. Which of the following Boolean statements is true? A) X > y will give the result false when the value of x is greater than the value of y. B) X > y will give the result true when the value of x is greater than the value of y. C) X > y will give the result true when the value of x is less than the value of y. D) X > y will give the result false when the value of x is less than the value of y. Show Answer Correct Answer: B) X > y will give the result true when the value of x is greater than the value of y. 19. What is the output of an EX-NOR gate? A) (AB' + A'B)'. B) (AB + A'B'). C) A'B + AB'. D) (AB + AB)". Show Answer Correct Answer: A) (AB' + A'B)'. 20. Define Boolean algebra and its importance in digital logic. A) Boolean algebra is essential in digital logic for designing and analyzing circuits using logical operations. B) Boolean algebra is crucial for optimizing database queries. C) Boolean algebra is used for statistical analysis in data science. D) Boolean algebra simplifies arithmetic operations in programming. Show Answer Correct Answer: A) Boolean algebra is essential in digital logic for designing and analyzing circuits using logical operations. 21. What would the following condition return?100 * 3 <= 200 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 22. Explain the difference between combinational and sequential circuits. A) Combinational circuits have feedback loops; sequential circuits do not. B) Combinational circuits are memoryless and depend only on current inputs; sequential circuits depend on current inputs and past states. C) Combinational circuits store data; sequential circuits do not. D) Sequential circuits are faster than combinational circuits. Show Answer Correct Answer: B) Combinational circuits are memoryless and depend only on current inputs; sequential circuits depend on current inputs and past states. 23. What would the following condition return?"Hello world!" != "Hi earth!" A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 24. Which passes a Boolean to a String? A) Print "has dog". B) Str(has dog). C) Print "has dog" str. D) (input)(has dog). Show Answer Correct Answer: B) Str(has dog). 25. What is the purpose of boolean statements in Java? A) To perform arithmetic calculations. B) To compare values and determine their relationship. C) To print output on the console. D) To create loops and iterations. Show Answer Correct Answer: B) To compare values and determine their relationship. ← PreviousNext →Related 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