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Logic Gates MCQ Basic Level

Physics is an important subject in preparation for various Competitive exams.To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on Logic Gates. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers..

Q1.  How many NAND gates are used to form an AND gate :
•  1
•  2
•  3
•  4
Solution

Q2.A gate has the following truth table
P 1 1 0 0
Q 1 0 1 0
R 1 0 0 0
•  NOR
•  OR
•  NAND
•  AND
Solution

Q3.  A logic gate is an electronic circuit which
•   Makes logic decisions
•   Allows electrons flow only in one direction
•   Works binary algebra
•  Alternates between 0 and 1 values
Solution

Q4. The logic behind ‘NOR’ gate is that it gives
•   High output when both the inputs are low
•   Low output when both the inputs are low
•   High output when both the inputs are high
•   None of these
Solution
Answer: High output when both the inputs are low

Q5. Boolean algebra is essentially based on
•  Truth
•   Logic
•   Symbol
•  Numbers
Solution

Q6. The truth-table given below is for which gate
A 0 0 1 1
B 0 1 0 1
C 1 1 1 0
•   XOR
•   OR
• AND
•   NAND
Solution

Q7.The truth table shown in figure is for
A 0 0 1 1
B 0 1 0 1
Y 1 0 0 1
•   XOR
•   AND
•   XNOR
•   OR
Solution

Q8.Which one of the following gates can be served as a building block for any digital circuit :
•   OR
•  AND
•   NOT
•  NAND
Solution

Q9.A truth table is given below. Which of the following has this type of truth table
A 0 1 0 1
B 0 0 1 1
y 1 0 0 0
•   XOR
•   NOR
•  NAND
•  OR
Solution

Q10. The following truth table corresponds to the logic gate
A 0 0 1 1
B 0 1 0 1
X 0 1 1 1

•  NAND
•  OR
•  AND
• XOR
Solution

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