This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 23 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If the result of any logical statement or expression is always False, for all input combinations. It is called Tautology. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 2. Which gate is used to find the complement of sum of 2 input signals? A) AND. B) OR. C) NAND. D) NOR. Show Answer Correct Answer: D) NOR. 3. OR gate with schematic "bubbles" on its inputs performs the same functions as ..... gate. A) NOT. B) EX-OR. C) NAND. D) NOR. Show Answer Correct Answer: C) NAND. 4. Evaluate:age = "10"age != 10 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 5. (1 + A + A) = A) A. B) ~A. C) 1. D) 0. E) Dirty dishes. Show Answer Correct Answer: C) 1. 6. Logic simplification mainly reduces A) Time. B) Cost. C) Power. D) All. Show Answer Correct Answer: D) All. 7. XOR gate output is HIGH when inputs are A) Same. B) Different. C) All HIGH. D) All LOW. Show Answer Correct Answer: B) Different. 8. What is the main purpose of a flip-flop in digital circuits? A) To store a single bit of data. B) To add two binary numbers. C) To act as a counter. D) To generate random numbers. Show Answer Correct Answer: A) To store a single bit of data. 9. How do you perform binary addition? A) Stack bits, multiply columns, shift over as needed. B) Line up digits, divide columns, drop as needed. C) Align bits, add columns, carry over as needed. D) Align numbers, subtract columns, borrow as needed. Show Answer Correct Answer: C) Align bits, add columns, carry over as needed. 10. What is the best explanation for why a computer uses boolean logic to manipulate True and False values? A) It can only understand 0s and 1s. B) It runs instructions in a binary code. C) It doesn't have enough memory to store numbers above 1. D) It uses transistors which can only be on or off. Show Answer Correct Answer: D) It uses transistors which can only be on or off. 11. What are the basic logical operators in Boolean algebra? A) NOR. B) XOR. C) AND, OR, NOT. D) NAND. Show Answer Correct Answer: C) AND, OR, NOT. 12. What is a problem statement in the context of logic circuits? A) A mathematical equation. B) A type of logic gate. C) A truth table representation. D) A specific scenario that needs to be solved. Show Answer Correct Answer: D) A specific scenario that needs to be solved. 13. In computers, an "on" state, when electricity is flowing, represents ..... A) False. B) True. C) Zero. D) Down. Show Answer Correct Answer: B) True. 14. What is the primary function of logic gates in a computer system? A) To perform logical operations. B) To store data. C) To amplify signals. D) To generate electricity. Show Answer Correct Answer: A) To perform logical operations. 15. Which of the following is De Morgan's Theorem? A) (A + B)' = A' . B'. B) A + A' . B = A + B. C) A + B = B + A. D) A + (B + C) = (A + B) + C. Show Answer Correct Answer: A) (A + B)' = A' . B'. 16. In an OR Gate if the input A is true and the input B is false the output will be ..... A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. What distinguishes an XOR operation from a regular OR operation? A) XOR outputs true only if both inputs are false. B) XOR outputs false if both inputs are true. C) XOR outputs true only if both inputs are true. D) XOR operates with more than two inputs. Show Answer Correct Answer: B) XOR outputs false if both inputs are true. 18. Aiden and Abigail are deciding whether to go to the park. Aiden wants to go (true), but Abigail does not (false). If their decision is made using an OR rule, what will be the outcome? A) True. B) False. C) Undefined. D) Both true and false. Show Answer Correct Answer: A) True. 19. How many output bits are required for a two-bit binary adder? A) A.1. B) B.2. C) C.3. D) None of the above. Show Answer Correct Answer: B) B.2. 20. Which number represents False? A) 0. B) -1. C) -10. D) -100. Show Answer Correct Answer: A) 0. 21. What is the function of a NOT gate? A) Inverts the input. B) Adds two inputs. C) Multiplies two inputs. D) None of the above. Show Answer Correct Answer: A) Inverts the input. 22. The exam will only accept expressions written in one specific notation A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. In Boolean expression A+AB simplifies ..... A) A. B) B. C) A+B. D) 1. Show Answer Correct Answer: A) A. 24. How can Boolean logic be applied in computer programming? A) Boolean logic helps in designing user interfaces. B) Boolean logic is primarily for enhancing graphics performance. C) Boolean logic is used for data storage optimization. D) Boolean logic is applied in programming for decision-making and controlling program flow. Show Answer Correct Answer: D) Boolean logic is applied in programming for decision-making and controlling program flow. 25. How do we get all the inputs for a truth table with 3 inputs? A) Guess all the combinations of 1s and 0s. B) Count up in binary from 000. C) Count up in binary from 111. D) Count up in binary from 1. Show Answer Correct Answer: B) Count up in binary from 000. ← 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