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Q:

The term photon refers to

A) light ray B) sub atomic particle
C) radiation D) None of the above
 
Answer & Explanation Answer: B) sub atomic particle

Explanation:

The photon is a type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light, and the force carrier for the electromagnetic force. The photon has zero rest mass and always moves at the speed of light within a vacuum.

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Filed Under: Physics
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Q:

How many budgets are presented in the Parliament?

A) 91 B) 92
C) 90 D) 89
 
Answer & Explanation Answer: D) 89

Explanation:

Till now, upto 2019 89 budgets are presented in Parliament.

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Filed Under: Indian History
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Q:

How many constructors can a class have?

A) 1 B) 2
C) 4 D) None of the above
 
Answer & Explanation Answer: D) None of the above

Explanation:

A class can have any number of constructors. If a class have more than one constructor, we call it as the constructor is overloaded.

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Filed Under: Java
Job Role: Database Administration , IT Trainer

Q:

The ratio of efficiencies of two filling pipes is 4 : 5. There is a third emptying pipe which efficiency is two third of the average efficiency of first two filling pipes can empty a filled tank in 36 minutes. In how much time both the filling pipes can fill the tank when it is empty?

A) 16 min B) 12 min
C) 14 min D) 20 min
 
Answer & Explanation Answer: B) 12 min

Explanation:

Let the efficiencies of filling pipes is 4p and 5p respectively.

Efficiency of pipe which empty the tank = 2/3 x 9p/2 = 3p

Total work = 3p x 36 = 108p

 

Time to fill the tank by both the pipes = 108p/9p = 12 min.

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Filed Under: Pipes and Cistern
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Q:

How many numbers of five digits can be formed by using the digits 1, 0, 2, 3, 5, 6 which are between 50000 and 60000 without repeating the digits?

A) 120 B) 240
C) 256 D) 360
 
Answer & Explanation Answer: A) 120

Explanation:

Required number of 5 digit numbers can be formed by using the digits 1, 0, 2, 3, 5, 6 which are between 50000 and 60000 without repeating the digits are 

5 x 4 x 3 x 2 x 1 = 120.

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Filed Under: Permutations and Combinations
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Q:

Who is the most run getter in T20 internationals?

A) Virat Kohli B) Rohit Sharma
C) M S Dhoni D) Shikar Dhawan
 
Answer & Explanation Answer: B) Rohit Sharma

Explanation:
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Filed Under: Sports
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Q:

How to call a constructor in java?

Answer

Constructor chaining is the process of calling one constructor from another constructor with respect to current object.





Within same class: It can be done using this() keyword for constructors in same class


From base class: by using super() keyword to call constructor from the base class.

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Subject: Java
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Q:

Who was the first woman to walk on the moon?

A) Sally Ride B) Svetlana Savitskaya
C) Valentina Tereshkova D) Williams
 
Answer & Explanation Answer: C) Valentina Tereshkova

Explanation:

Valentina Tereshkova was the first woman to walk on the moon.

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Filed Under: General Awareness
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