Questions

Q:

Conservation of energy refers to the fact that

A) if you conserve energy you will not be as tired B) energy cannot be created or destroyed but can be converted from one form to another
C) no chemical reaction is 100 percent efficient D) the entropy of the universe is always increasing
 
Answer & Explanation Answer: B) energy cannot be created or destroyed but can be converted from one form to another

Explanation:

"Conservation of energy" refers to the fact that energy cannot be created or destroyed but can be converted from one form to another.

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Q:

The mass defect is the result of what action occurring?

A) mass being converted to energy when protons and neutrons bind together in a nucleus B) protons and electrons being attracted to each other
C) energy being converted into moles of atoms when neutrons break apart protons D) mass being converted to energy when protons and neutrons break apart in a nucleus
 
Answer & Explanation Answer: A) mass being converted to energy when protons and neutrons bind together in a nucleus

Explanation:
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Q:

Software designed for a specific purpose is called as

A) System software B) Application software
C) Specific software D) None of the above
 
Answer & Explanation Answer: B) Application software

Explanation:

Software designed for a specific purpose is called as Application software.

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Q:

Read each sentence to find out whether there is any grammatical error or idiomatic error in it. The error, if any, will be in one part of the sentence. The letter of that part is the answer. If there is no error, mark the answer as No error. (Ignore errors of the punctuation if any).It was a long/ and uncomfortable journey / but he managed / to reach with time.

A) It was a long B) and uncomfortable journey
C) but he managed D) to reach with time.
 
Answer & Explanation Answer: D) to reach with time.

Explanation:

Here, “to reach in time” should be used. Idiom in times mean, not late. with enough time, to be able to do something

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Filed Under: English
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Q:

Improve the following code using typedef.

struct node

{

      int data1;  float data2;

       struct node *left;

       struct node *right;

};

struct node *ptr;

ptr = (struct node *) malloc (sizeof (struct node) ); 

Answer

typedef struct node * treeptr


typedef struct node


{


         int data1;


         float data2;


         treeptr *left;


         treeptr *right;


}treenode;


treeptr ptr;


ptr = ( treeptr ) malloc ( sizeof ( treenode ) );

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Subject: Programming

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Q:

There are five boxes in a cargo hold. The weight of the first box is 200 kg and the weight of the second box is 20% higher than the weight of the third box, whose weight is 25% higher than the first box’s weight. The fourth box at 350 kg is 30% lighter than the fifth box. Find the difference in the average weight of the four heaviest boxes and the four lightest boxes.

A) 51.5 kg B) 75 kg
C) 37.5 kg D) 112.5 kg
 
Answer & Explanation Answer: B) 75 kg

Explanation:
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Q:

Which of the following planets is known as Earth's twin?

A) Mars B) Saturn
C) Uranus D) Venus
 
Answer & Explanation Answer: D) Venus

Explanation:

Venus is known as earth's twin because of its closeness to the earth with respect to size, mass(weight) and density.

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Q:

Air is said to be saturated when

A) its pressure is minimum B) it contains the maximum content of water vapour
C) its thickness is maximum D) it blows over the barren land
 
Answer & Explanation Answer: B) it contains the maximum content of water vapour

Explanation:

Air is said to be saturated when it contains the maximum content of water vapour.

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