This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Computer Science > Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Evaluate:18 > 4 and 18 < 20 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. In Boolean algebra, what is the result of NOT(True)? A) Undefined. B) False. C) 0. D) True. Show Answer Correct Answer: B) False. 3. What is the Boolean expression for a NAND gate? A) NOT(A) + NOT(B). B) NOT(A * B). C) A * B. D) NOT(A + B). Show Answer Correct Answer: B) NOT(A * B). 4. What is the principle of redundancy in Boolean algebra? A) Redundancy eliminates the need for simplification in Boolean algebra. B) Redundancy allows for the simplification of Boolean expressions by removing unnecessary variables. C) Redundancy increases the complexity of Boolean expressions. D) Redundancy is used to add more variables to Boolean equations. Show Answer Correct Answer: B) Redundancy allows for the simplification of Boolean expressions by removing unnecessary variables. 5. What is a binary number system? A) A binary number system is a base-2 numeral system that uses only the digits 0 and 1. B) A binary number system is a base-3 numeral system that uses digits 0, 1, and 2. C) A binary number system is a base-10 numeral system that uses digits 0 to 9. D) A binary number system is a hexadecimal system that includes letters A to F. Show Answer Correct Answer: A) A binary number system is a base-2 numeral system that uses only the digits 0 and 1. 6. ( 5-3 ) * 8 >= 16 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. Boolean values are true or false. Which parameter is a boolean?Rect(left, top, width, height, fill='black', opacity=100, visible=True) A) Fill. B) Left. C) Opacity. D) Visible. Show Answer Correct Answer: D) Visible. 8. If a input signal a=11100 is applicable to a NOT gate, its output signal is A) 01001. B) 1000. C) 00011. D) 00011. Show Answer Correct Answer: C) 00011. 9. Which gate inverts the input? A) AND gate. B) OR gate. C) NOT gate. D) NAND gate. Show Answer Correct Answer: C) NOT gate. 10. For the OR operation ..... A) Only one of the inputs needs to be TRUE for the output to be TRUE. B) One input must be FALSE for the output to be FALSE. C) Both inputs must match for the output to be TRUE. D) None of the above. Show Answer Correct Answer: A) Only one of the inputs needs to be TRUE for the output to be TRUE. 11. A switching function f(A, B, C, D) = A'B'CD+A'BC'D+A'BCD+AB'CD A) $\sigma$m(3, 5, 7, 11). B) $\sigma$m(3, 5, 7, 13). C) $\sigma$m(3, 5, 8, 11). D) $\sigma$m(6, 5, 7, 11). Show Answer Correct Answer: A) $\sigma$m(3, 5, 7, 11). 12. How is Boolean algebra applied in designing digital circuits? A) Boolean algebra is used for simplifying chemical reactions. B) Boolean algebra is applied in designing digital circuits by simplifying and optimizing logic functions. C) Boolean algebra is used for designing mechanical circuits. D) Boolean algebra is applied in designing analog circuits. Show Answer Correct Answer: B) Boolean algebra is applied in designing digital circuits by simplifying and optimizing logic functions. 13. A Half Adder has how many inputs and outputs? A) 3 inputs, 2 outputs. B) 2 inputs, 1 output. C) 1 input, 1 output. D) 2 inputs, 2 outputs. Show Answer Correct Answer: D) 2 inputs, 2 outputs. 14. Name the basic Boolean Operators. A) AND. B) OR. C) NOT. D) All of the above. Show Answer Correct Answer: D) All of the above. 15. Benjamin is learning about how computers work in his technology class. His teacher explains that the foundation for digital logic used in computers was laid by a famous mathematician. Who is this mathematician? A) George Boole. B) Aristotle. C) Alan Turing. D) Isaac Newton. Show Answer Correct Answer: A) George Boole. 16. 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. 17. 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. 18. 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. 19. Evaluate:age = "10"age != 10 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 20. Logic simplification mainly reduces A) Time. B) Cost. C) Power. D) All. Show Answer Correct Answer: D) All. 21. XOR gate output is HIGH when inputs are A) Same. B) Different. C) All HIGH. D) All LOW. Show Answer Correct Answer: B) Different. 22. 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. 23. How do you perform binary addition? A) Line up digits, divide columns, drop as needed. B) Align numbers, subtract columns, borrow as needed. C) Stack bits, multiply columns, shift over as needed. D) Align bits, add columns, carry over as needed. Show Answer Correct Answer: D) Align bits, add columns, carry over as needed. 24. 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. 25. 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. 26. What is a problem statement in the context of logic circuits? A) A mathematical equation. B) A specific scenario that needs to be solved. C) A type of logic gate. D) A truth table representation. Show Answer Correct Answer: B) A specific scenario that needs to be solved. 27. In computers, an "on" state, when electricity is flowing, represents ..... A) False. B) Down. C) Zero. D) True. Show Answer Correct Answer: D) True. 28. What is the primary function of logic gates in a computer system? A) To perform logical operations. B) To generate electricity. C) To store data. D) To amplify signals. Show Answer Correct Answer: A) To perform logical operations. 29. Which of the following is De Morgan's Theorem? A) (A + B)' = A' . B'. B) A + A' . B = A + B. C) A + (B + C) = (A + B) + C. D) A + B = B + A. Show Answer Correct Answer: A) (A + B)' = A' . B'. 30. 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. 31. 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. 32. 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. 33. Which number represents False? A) -10. B) -1. C) 0. D) -100. Show Answer Correct Answer: C) 0. 34. 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. 35. 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. 36. In Boolean expression A+AB simplifies ..... A) A. B) B. C) 1. D) A+B. Show Answer Correct Answer: A) A. 37. 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. 38. 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. 39. Which of the following gates only takes one input? A) AND. B) OR. C) NOT. D) None of the above. Show Answer Correct Answer: C) NOT. 40. Discuss the properties of Boolean algebra. A) Inclusive law. B) Exponential law. C) Inversion law. D) The properties of Boolean algebra include commutative, associative, distributive, identity, and complement laws. Show Answer Correct Answer: D) The properties of Boolean algebra include commutative, associative, distributive, identity, and complement laws. 41. Which of the following gate types below is NOT considered a universal gate?a. XORb. NANDc. NORd. None of the above A) . B) . C) . D) . Show Answer Correct Answer: A) . 42. Explain the concept of a hexadecimal number system. A) The hexadecimal number system is a base-16 system using digits 0-9 and letters A-F. B) The hexadecimal number system is a base-16 system using only digits 0-5. C) Hexadecimal is a base-8 system that uses digits 0-7. D) The hexadecimal system is a base-10 system using digits 0-9. Show Answer Correct Answer: A) The hexadecimal number system is a base-16 system using digits 0-9 and letters A-F. 43. In an AND gate, the inputs are 'A' and 'B' and the output is 'Q'. If A = 0 and B = 1, what is the output, 'Q'? A) False. B) 1. C) 0. D) True. Show Answer Correct Answer: C) 0. 44. AND Gate:If A is OFF but B is ON, the output would be ..... (1 mark) A) ON. B) OFF. C) All the above. D) None of the above. Show Answer Correct Answer: B) OFF. 45. A NAND gate is the combination of which two gates A) OR and AND. B) AND and NOT. C) NOT and OR. D) OR and NAND. Show Answer Correct Answer: B) AND and NOT. 46. What is the output of an AND gate if the inputs are 1 and 0? A) ON. B) 1. C) 2. D) 0. Show Answer Correct Answer: D) 0. 47. OR Gate:IF A is ON and B is ON, the output would be ..... (1 mark) A) ON. B) OFF. C) All the above. D) None of the above. Show Answer Correct Answer: A) ON. 48. According to the distributive law A(B+C)=? A) ABC. B) AB+AC. C) A+B+C. D) A+BC. Show Answer Correct Answer: B) AB+AC. 49. Which of the following is NOT a characteristic of logic expressions? A) They are based on Boolean algebra. B) They use only one variable. C) They employ logical operators. D) They can represent logic circuits. Show Answer Correct Answer: B) They use only one variable. 50. What is a truth table used for? A) To show all possible inputs and outputs of a logic circuit. B) To summarize CPU performance. C) To manage memory addresses. D) To translate between number systems. Show Answer Correct Answer: A) To show all possible inputs and outputs of a logic circuit. 51. How does a JK flip-flop differ from an SR flip-flop? A) It requires more inputs than an SR flip-flop. B) It resolves the issue of the SR flip-flop's indeterminate state. C) It cannot store binary data. D) It is only used for multiplication. Show Answer Correct Answer: B) It resolves the issue of the SR flip-flop's indeterminate state. 52. What is the result of the following expression:true or true = ..... A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 53. Noah is programming a smart home system. He wants a light to turn on only when the sensor detects that it is NOT dark. Which operation would Noah use to invert the sensor's logical value? A) AND. B) OR. C) NOT. D) XOR. Show Answer Correct Answer: C) NOT. 54. Mia is planning a picnic and wants to go only if it is sunny or her friends are available. Which Boolean operation would Mia use to check if at least one of these conditions is true? A) AND. B) OR. C) NOT. D) NAND. Show Answer Correct Answer: B) OR. 55. Explain the concept of a flip-flop in logic design. A) A flip-flop is a bistable device that stores one bit of data and changes state based on input signals and clock pulses. B) A flip-flop is a memory unit that requires no clock signals to operate. C) A flip-flop is a component that generates random signals for digital circuits. D) A flip-flop is a single-state device that only transmits data without storing it. Show Answer Correct Answer: A) A flip-flop is a bistable device that stores one bit of data and changes state based on input signals and clock pulses. 56. State the Boolean expression for an OR gate with inputs A and B. A) A' B'. B) A B. C) A' + B'. D) A + B. Show Answer Correct Answer: D) A + B. 57. In an OR statement both sides need to be TRUE to produce an output of TRUE. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 58. Define the Boolean expression for an AND gate with inputs X and Y. A) X + Y. B) X' + Y'. C) X' Y'. D) X Y. Show Answer Correct Answer: D) X Y. 59. Which logic gate take the input and negates it, turning 0 to 1 and 1 to 0? A) AND. B) OR. C) NOT. D) None of the above. Show Answer Correct Answer: C) NOT. 60. Which of the following best describes how to group terms in a K-map? A) Groups must be in powers of 2 (1, 2, 4, 8, etc.). B) Groups must be arranged diagonally. C) Groups can overlap randomly. D) Groups must contain at least 3 terms. Show Answer Correct Answer: A) Groups must be in powers of 2 (1, 2, 4, 8, etc.). ← PreviousNext →Related QuizzesScience QuizzesClass 12 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books