Logic Gates MCQ Basic Level

Logic Gates MCQ Basic Level

Dear Readers,

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
Answer: 2

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
Answer: AND

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
Answer: Makes logic decisions

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
 Answer: Logic

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
Answer: NAND

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
Answer : XNOR

Q8.Which one of the following gates can be served as a building block for any digital circuit :

•   OR
•  AND
•   NOT
•  NAND

Solution
Answer: NAND

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
Answer: NOR

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
Answer: OR