This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is an example of a non-weighted code? A) BCD. B) Excess-3. C) Gray code. D) Octal code. Show Answer Correct Answer: C) Gray code. 2. Evaluate:die1 = 6die2 = 3score = die1+die2score >= 10 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 3. Write the Boolean value of FALSE. A) 0. B) 1. C) All the above. D) None of the above. Show Answer Correct Answer: A) 0. 4. ( (Not True) OR ( 5 != 25) ) NAND ( (5 < 4) XOR True ) A) True. B) False. C) This is just unfair now. D) None of the above. Show Answer Correct Answer: B) False. 5. Identify the gate that can be used to implement all other logic gates. A) XOR. B) NOR. C) XNOR. D) Buffer. Show Answer Correct Answer: B) NOR. 6. State the purpose of a D type flip-flop A) To store the state of clock pulses. B) To store the state of a bit. C) To store logic gates. D) To store calculations. Show Answer Correct Answer: B) To store the state of a bit. 7. An OR gate has A) Two inputs and one output. B) One input and one output. C) One input and two outputs. D) Two inputs and two outputs. Show Answer Correct Answer: A) Two inputs and one output. 8. Identify the Boolean notation for the complement of A. A) A + 1. B) A'. C) 1-A. D) -A. Show Answer Correct Answer: B) A'. 9. 5) The Boolean expression for a 3-input AND gate is ..... A) A )X = AB. B) B) X = ABC. C) C) X = A + B + C. D) D) X = AB + C. Show Answer Correct Answer: B) B) X = ABC. 10. If the result of a logical expression or logical statement is always true or 1 A) TAUTOLOGY. B) FALLACY. C) TRUE. D) LOGIC GATE. Show Answer Correct Answer: A) TAUTOLOGY. 11. The output of an OR gate is LOW when all inputs are: A) 0. B) 1. C) Equal. D) Don't care. Show Answer Correct Answer: A) 0. 12. The only time this statement is false is if both inputs are false. A) A NOT gate. B) An AND statement. C) An OR statement. D) An IF statement. Show Answer Correct Answer: C) An OR statement. 13. In negative logic, the logic 1 state corresponds to A) High voltage level. B) Low voltage level. C) Negative voltage level. D) Ground level. Show Answer Correct Answer: D) Ground level. 14. The binary equivalent of decimal number 13 is: A) 1100. B) 1110. C) 1101. D) 1011. Show Answer Correct Answer: C) 1101. 15. The involution of A is equal to ..... A) A. B) A'. C) 1. D) 0. Show Answer Correct Answer: A) A. 16. What is the branch of mathematics that deals exclusively with true and false values? A) Vector algebra. B) Trigonometry. C) Boolean algebra. D) Algebraic combinatorics. Show Answer Correct Answer: C) Boolean algebra. 17. What is the simplified form of A + A? A) A. B) 1. C) 0. D) AA. Show Answer Correct Answer: A) A. 18. What is the output of an OR gate if both inputs are 1? A) 1. B) 0. C) Depends on the circuit. D) Undefined. Show Answer Correct Answer: A) 1. 19. The product consists of either the variables or its negations is called A) Maxterm. B) Minterm. C) None. D) None of the above. Show Answer Correct Answer: B) Minterm. 20. The simplest gate is the ..... gate, also known as an inverter. It accepts a single input and outputs the opposite value A) NOT. B) AND. C) NAND. D) AND. Show Answer Correct Answer: A) NOT. 21. Which of these is considered universal gate A) AND. B) NOT. C) XOR. D) NOR. Show Answer Correct Answer: D) NOR. 22. Which gate is used to find the complement of product of 2 input signals? A) AND. B) OR. C) NAND. D) NOR. Show Answer Correct Answer: C) NAND. 23. Truth table shows A) Logic diagram. B) Output for all inputs. C) Circuit delay. D) Memory size. Show Answer Correct Answer: B) Output for all inputs. 24. Select the best definition of a literal A) A Boolean variable. B) The complement of a Boolean variable. C) 1 or 2. D) The actual understanding of a Boolean variable. Show Answer Correct Answer: C) 1 or 2. 25. When is the output for AND gate TRUE? A) When both inputs are TRUE. B) When at least one of the inputs is TRUE. C) When both inputs are FALSE. D) When at least one of the inputs is FALSE. Show Answer Correct Answer: A) When both inputs are TRUE. 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