Logic Gates

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Logic Gates MCQ & Objective Questions

Logic Gates are fundamental building blocks in digital electronics and play a crucial role in various exams. Understanding Logic Gates is essential for students preparing for school exams and competitive tests. Practicing MCQs and objective questions on this topic not only enhances conceptual clarity but also boosts your chances of scoring better in exams.

What You Will Practise Here

  • Basic definitions and functions of Logic Gates
  • Types of Logic Gates: AND, OR, NOT, NAND, NOR, XOR, and XNOR
  • Truth tables and their significance
  • Boolean algebra and its application in Logic Gates
  • Real-world applications of Logic Gates in circuits
  • Common circuits using Logic Gates
  • Diagrams illustrating Logic Gate configurations

Exam Relevance

Logic Gates are frequently featured in the syllabus of CBSE, State Boards, NEET, and JEE. Students can expect questions that test their understanding of basic concepts, truth tables, and applications of Logic Gates. Common question patterns include multiple-choice questions that require students to identify the correct output of a given Logic Gate configuration or to solve problems using Boolean algebra.

Common Mistakes Students Make

  • Confusing the functions of different Logic Gates
  • Errors in constructing truth tables
  • Misapplying Boolean algebra rules
  • Overlooking the significance of the output in complex circuits

FAQs

Question: What are the basic types of Logic Gates?
Answer: The basic types of Logic Gates include AND, OR, NOT, NAND, NOR, XOR, and XNOR.

Question: How do I create a truth table for a Logic Gate?
Answer: To create a truth table, list all possible input combinations and determine the corresponding output for each Logic Gate.

Now is the time to enhance your understanding of Logic Gates! Dive into our practice MCQs and test your knowledge to excel in your exams. Remember, consistent practice is the key to success!

Q. If A is true and B is true, what is the output of A OR B?
  • A. True
  • B. False
  • C. 1
  • D. 0
Q. What is the output of a NAND gate if both inputs are 1?
  • A. 0
  • B. 1
  • C. undefined
  • D. error
Q. What is the output of a NAND gate if both inputs are true?
  • A. True
  • B. False
  • C. 1
  • D. 0
Q. What is the output of a NOR gate if one input is 1?
  • A. 0
  • B. 1
  • C. undefined
  • D. error
Q. What is the output of a NOT gate when the input is false?
  • A. True
  • B. False
  • C. 1
  • D. 0
Q. What is the output of an AND gate if both inputs are 1?
  • A. 0
  • B. 1
  • C. undefined
  • D. error
Q. What is the output of an AND gate if both inputs are true?
  • A. True
  • B. False
  • C. Undefined
  • D. None of the above
Q. What is the output of an OR gate if both inputs are false?
  • A. True
  • B. False
  • C. 1
  • D. 0
Q. What is the truth value of A AND B if A is true and B is false?
  • A. True
  • B. False
  • C. Undefined
  • D. Both True and False
Q. What is the truth value of an OR gate with inputs 0 and 0?
  • A. 0
  • B. 1
  • C. undefined
  • D. error
Q. Which gate is equivalent to an OR gate followed by a NOT gate?
  • A. AND
  • B. NAND
  • C. NOR
  • D. XOR
Q. Which gate is known as an inverter?
  • A. AND
  • B. OR
  • C. NOT
  • D. XOR
Q. Which gate is the opposite of an AND gate?
  • A. OR
  • B. NAND
  • C. NOR
  • D. XOR
Q. Which gate produces a true output only when both inputs are different?
  • A. AND
  • B. OR
  • C. XOR
  • D. NAND
Q. Which logic gate is represented by the expression A + B?
  • A. AND
  • B. OR
  • C. NOT
  • D. XOR
Q. Which logic gate outputs 1 when at least one input is 1?
  • A. AND
  • B. OR
  • C. NOT
  • D. NAND
Q. Which logic gate outputs true if at least one input is true?
  • A. AND
  • B. OR
  • C. NOT
  • D. NAND
Q. Which logic gate produces a true output only when both inputs are different?
  • A. AND
  • B. OR
  • C. XOR
  • D. NOR
Q. Which of the following gates is known as an inverter?
  • A. AND
  • B. OR
  • C. NOT
  • D. NAND
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