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 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Computer Science Chapter 6 Boolean Algebra And Logic Gates Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In boolean addition 1+1 = ..... A) 1. B) 0. C) 10. D) 11. Show Answer Correct Answer: B) 0. 2. What is the function of an OR gate? A) Produces output 1 when both inputs are 1. B) Produces output 1 when at least one input is 1. C) Produces output 0 when both inputs are 0. D) Both B and C. Show Answer Correct Answer: D) Both B and C. 3. Is represented as A) Famous KSA Victory over Argentina. B) IF Argentina wins the World cup Saudi Arabia is the only team who beat Argentina. C) Real Champ is KSA if Argentina Win. D) All of the option. Show Answer Correct Answer: D) All of the option. 4. (23 !=5) || false A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 5. The number of Terms in a switching function of four variables A) 16. B) 8. C) 4. D) 12. Show Answer Correct Answer: A) 16. 6. The output of a two-input OR gate is high when A) Both inputs are low. B) Both inputs are high. C) Any one input is high. D) Only one input is high. Show Answer Correct Answer: C) Any one input is high. 7. Luna is learning how computers store information. Her teacher explains that computers use a system that represents two states, like "on" and "off" . What does the term "Binary" refer to in computing? A) A type of electrical current. B) A mathematical equation. C) A system that represents two states. D) A programming language. Show Answer Correct Answer: C) A system that represents two states. 8. Which logic gate represents the OR operation? A) A gate that outputs 1 if at least one input is 1. B) A gate that multiplies binary values. C) A gate that adds decimal numbers. D) A gate that inverts input. Show Answer Correct Answer: A) A gate that outputs 1 if at least one input is 1. 9. What is a Karnaugh map and how is it used? A) A Karnaugh map is a software tool for programming languages. B) A Karnaugh map is a method for calculating probabilities in statistics. C) A Karnaugh map is a graphical representation of linear equations. D) A Karnaugh map is a tool used to simplify Boolean expressions and visualize truth tables. Show Answer Correct Answer: D) A Karnaugh map is a tool used to simplify Boolean expressions and visualize truth tables. 10. What is the output of a NOR gate when both inputs are true? A) True. B) Null. C) Undefined. D) False. Show Answer Correct Answer: D) False. 11. THE GATE WHICH IS USED TO REVERSE THE OUTPUT OBTAINED IS ..... A) NOR. B) NAND. C) AND. D) NOT. Show Answer Correct Answer: D) NOT. 12. A NOT gate has ..... A) Two inputs and one input. B) One input and one output. C) One input and two outputs. D) Two inputs and two outputs. Show Answer Correct Answer: B) One input and one output. 13. How can the XOR gate be represented in text-based Boolean algebra? A) A plus symbol with a circle around it. B) A slash or bar. C) A dot. D) A plus symbol. Show Answer Correct Answer: A) A plus symbol with a circle around it. 14. A Boolean expression ..... A) Checks if something is True or False. B) Loops the programs to continue infinitely. C) Sets everything in it equal to eachother. D) Fixes any errors in the line of code. Show Answer Correct Answer: A) Checks if something is True or False. 15. A . B is the same as A) B . B. B) A + B. C) A . A. D) B . A. Show Answer Correct Answer: D) B . A. 16. Evaluate this Boolean expression:NOT(I am in the Library OR It is night time) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. ..... is elementary building block of a digital circuit that manipulates the binary information A) Binary numbers. B) Logic gate. C) All the above. D) None of the above. Show Answer Correct Answer: B) Logic gate. 18. How many input values does a NOT gate have? A) 2. B) 3. C) 4. D) 1. Show Answer Correct Answer: D) 1. 19. What is the result of the expression NOT (A OR B)? A) (NOT A) AND (NOT B). B) A AND B. C) A XOR B. D) NOT A OR NOT B. Show Answer Correct Answer: A) (NOT A) AND (NOT B). 20. What is the purpose of logic gates? A) To allow an electronic system to make a decision based on its outputs. B) To allow an electronic system to make a decision based on its inputs. C) To allow a program to make a decision based on its inputs. D) To allow a program to make a decision based on its outputs only. Show Answer Correct Answer: B) To allow an electronic system to make a decision based on its inputs. 21. WHICH GATE RETURNS TRUE IF BOTH INPUTS ARE SIMILAR OTHERWISE FALSE. A) NAND. B) XNOR. C) NOR. D) None of the above. Show Answer Correct Answer: B) XNOR. 22. A Karnaugh Map with two variables has how many cells? A) 8. B) 4. C) 16. D) 2. Show Answer Correct Answer: B) 4. 23. What does a D-type flip-flop do? A) Stores and outputs a value based on a clock signal. B) Adds two binary numbers. C) Sends a signal to a printer. D) Multiplies two inputs. Show Answer Correct Answer: A) Stores and outputs a value based on a clock signal. 24. What happens if the code finds a 'Yes'? A) Check for peanuts. B) Compare values. C) Ignore the statement. D) Make the statement. Show Answer Correct Answer: D) Make the statement. 25. Evelyn and Zoe are deciding whether to go out for ice cream. They agree that they will only go if one of them wants to go, but not both. What is a key feature of their decision-making process? A) It is true if both Evelyn and Zoe want ice cream. B) It is false if both Evelyn and Zoe want ice cream. C) It requires no input from Evelyn or Zoe. D) It represents a binary number. Show Answer Correct Answer: B) It is false if both Evelyn and Zoe want ice cream. 26. State the first DeMorgan's Theorem. A) A' B' = (A + B). B) (A B)' = A' + B'. C) (A + B)' = A' + B'. D) (A + B)' = A' B'. Show Answer Correct Answer: D) (A + B)' = A' B'. 27. Name the law:-AB=BA A) Involution law. B) Commutative law. C) Distributive law. D) Associative law. Show Answer Correct Answer: B) Commutative law. 28. How is the XOR operation different from the OR operation? A) XOR outputs True only when both inputs are the same. B) XOR outputs True only when one input is True and the other is False. C) XOR always outputs False. D) XOR is the same as OR. Show Answer Correct Answer: B) XOR outputs True only when one input is True and the other is False. 29. How can logic gate calculations represented? A) As a document. B) As a programming language. C) As truth tables. D) None of the above. Show Answer Correct Answer: C) As truth tables. 30. Boolean Addition is equivalent to the ..... operation. A) OR. B) AND. C) NOT. D) NAND. Show Answer Correct Answer: A) OR. 31. What is the binary equivalent of the decimal number 13? A) 1001. B) 1011. C) 1110. D) 1101. Show Answer Correct Answer: D) 1101. 32. Principle of Duality in Boolean Algebra states that startingwith a boolean relation, another Booleanrelation can be derived by: A) Changing each OR sign (+) to an AND sign (.). B) Changing each AND sign (.) to an OR sign (+). C) Replacing each 1 by a 0 and each 0 by a 1e.g., 0 + 1= 1 Dual 1 . 0 = 0. D) All the these. Show Answer Correct Answer: D) All the these. 33. Universal gates are A) AND, OR. B) NAND, NOR. C) XOR, XNOR. D) NOT only. Show Answer Correct Answer: B) NAND, NOR. 34. Decide if the boolean expression evaluates to true or false. Given:a = 1, b = 0, c = 3(a * c) != b A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 35. If 3-input OR gate has 8 input possibilities how many possibilities will result in HIGH output? A) 1. B) 7. C) 2. D) 8. Show Answer Correct Answer: B) 7. 36. What does the complement operation do in Boolean Algebra? A) Inverts the value. B) Adds two values. C) Multiplies two values. D) None of the above. Show Answer Correct Answer: A) Inverts the value. 37. Evaluate this Boolean expression:I am in Computer Science AND I am in Year 8 A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 38. What is the truth table output for an AND gate when A=0 and B=1? A) Undefined. B) A. C) 0. D) 1. Show Answer Correct Answer: C) 0. 39. Zaria and Carl are making a game and to go to the next level a player must have >=1000 gold coins. The player only has 900 gold coins and cannot advance until they gather 100 more gold golds. What kind of Boolean Operator has been coded? A) Conditional Boolean. B) Logical Operations. C) Checks for a specific condition. D) Comparative Boolean. Show Answer Correct Answer: A) Conditional Boolean. 40. In computers, the "on" and "off" states correlate to ..... A) If electricity is flowing or not. B) If one computer is able to talk to another computer. C) If the internet is connected to WiFi. D) If the computer is on or off. Show Answer Correct Answer: A) If electricity is flowing or not. 41. Recognize the truth table output pattern of an AND gate. A) 1, 1, 0, 0. B) 0, 0, 0, 1. C) 0, 1, 1, 1. D) 1, 0, 0, 1. Show Answer Correct Answer: B) 0, 0, 0, 1. 42. Evaluate this Boolean expression:I am in the Library AND It is night time A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 43. The number of min terms for an expression comprising of 3 variables? A) 3. B) 0. C) 1. D) 8. Show Answer Correct Answer: D) 8. 44. Write the dual of 1 + 1 = 1 A) 0 + 0 = 0. B) 1.1 = 1. C) 1 . 1 =1. D) 0 . 0 = 0. Show Answer Correct Answer: D) 0 . 0 = 0. 45. We generally use A, B, C, D for inputs, but start from P for the first gate. This is because P stands for ..... A) Procedure. B) Process. C) Program. D) Possibility. Show Answer Correct Answer: B) Process. 46. Boolean algebra is primarily used in: A) Programming languages. B) Statistical analysis. C) Digital circuits. D) Arithmetic computation. Show Answer Correct Answer: C) Digital circuits. 47. Which Boolean operator is built from two transistors in parallel? A) NOT. B) AND. C) OR. D) IF. Show Answer Correct Answer: C) OR. 48. The name of the book written by George Boole and published in 1854 A) The Laws of Maths. B) The Laws of Reasoning. C) The Laws of Thought. D) The Laws of Logic. Show Answer Correct Answer: C) The Laws of Thought. 49. What are the main components of a number system? A) Digits, base (radix), and arithmetic rules. B) Symbols, value (magnitude), and logical operations. C) Numbers, structure (format), and conversion rules. D) Characters, system (format), and computational methods. Show Answer Correct Answer: A) Digits, base (radix), and arithmetic rules. 50. In Hexadecimal number system, D represents ..... A) 13. B) 14. C) 11. D) 12. Show Answer Correct Answer: A) 13. 51. How many different combinations of 1 and 0 are possible with 2 bits? A) 6. B) 4. C) 2. D) 8. Show Answer Correct Answer: B) 4. 52. What is the possible Binary combination of inputs for a 5 input combinational circuit? A) 5. B) 32. C) 10. D) 28. Show Answer Correct Answer: B) 32. 53. What is the main advantage of using a Karnaugh Map? A) It simplifies Boolean expressions systematically. B) It increases the number of logic gates needed. C) It converts logic gates into flip-flops. D) It performs binary addition automatically. Show Answer Correct Answer: A) It simplifies Boolean expressions systematically. 54. Choose 2 forms of Boolean expression A) SOP and POS. B) Combination and multiples. C) AND and OR gate. D) Input of A and B. Show Answer Correct Answer: A) SOP and POS. 55. Which additional gate(s) are required to build a full adder in addition to those in a half adder? A) XOR and OR. B) NOR and XOR. C) NAND and NOR. D) NOT and AND. Show Answer Correct Answer: A) XOR and OR. 56. Boolean algebra is define as mathematical expression of ..... Fill in the blank with answer. A) Digital system. B) Solar system. C) Computer system. D) Analog system. Show Answer Correct Answer: A) Digital system. 57. Which gate will output a 1 if any of the inputs are 1? A) AND. B) OR. C) NOT. D) None of the above. Show Answer Correct Answer: B) OR. 58. What base does binary use? A) 16. B) 11. C) 1. D) 2. Show Answer Correct Answer: D) 2. 59. What is the correct Boolean expression for a circuit with an OR gate leading into an AND gate, which then leads into a NOT gate? A) D = NOT C AND (A OR B). B) D = (A OR B) AND NOT C. C) D = NOT (A OR B) AND C. D) D = A AND B OR NOT C. Show Answer Correct Answer: A) D = NOT C AND (A OR B). 60. Select the output of a NAND gate when both inputs are 1. A) 0. B) 2. C) Undefined. D) 1. Show Answer Correct Answer: A) 0. ← 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books