Questions

Q:

Gases in the atmosphere and their percentages?

Answer

The air around us is a mixture of gases, mainly nitrogen and oxygen, but containing much smaller amounts of water and other gases.


Earth's atmosphere is composed of many gases. Their percentages by volume is given by::


 
78% Nitrogen,


21% Oxygen,


0.9% Argon, and


0.03% Carbon dioxide 


And very small percentages of other elements.


 

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Q:

Laterite soils contain high amounts of

A) Calcium carbonate B) Silicates
C) Calcites D) Iron oxide
 
Answer & Explanation Answer: D) Iron oxide

Explanation:

Laterite soils are a tropical soil and possess a great amount of iron and aluminum. Due to its high iron oxide content they look like rusty-red coloration.

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Q:

Which of the following requires one byte of storage?

A) Character B) Sentence
C) Page D) Paragraph
 
Answer & Explanation Answer: A) Character

Explanation:

A Unicode character requires between one and four bytes of storage, depending on the encoding format used. Hence, a character requires one byte of storage.

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Q:

A passage is given with 5 questions following it. Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.

 

Man's attitude to various animals changed many times in the course of centuries. From indifference or practicality, he went on to adoration and deification, and then to hatred. Ancient Egyptians, for example, highly appreciated the cat's ability to destroy rodents. The cat was much superior in this respect to the grass­snakes and weasels they had kept in their houses before. These proved unable to cope with hordes of rats which invaded Egypt from Asia. So the cat, a very useful animal, was ranked as a sacred animal and one of the most important animals, too. The goddess of the Moon, fertility and child­birth, Bast herself was portrayed by the Egyptians as a woman with a cat's head.

Sumptuous temples were built to this goddess, where cats were kept in luxury and fed the choicest of foods. They had their own priests and votaries, more numerous as a matter of fact than any other sacred animal could boast. According to the Greek historian Herodotus, the festival in the city of Bubastis, which had a temple dedicated to cats, was attended by as many as 700 thousand, who brought their offerings to the goddess in the shape of figurines of her made of gold, silver and bronze and adorned with precious stones.

 

Hordes of rats invaded Egypt. They came from _____ .

A) Europe B) Asia
C) Asia Minor D) Africa
 
Answer & Explanation Answer: B) Asia

Explanation:
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Q:

Point out the error, if any, in the following program.

main()

{

    int ( *p )() = fun;

    ( *P ) ();

}

fun ()

{

    Printf ( "\nLoud and clear" );

Answer

Here we are initalising the function pointer p to the address of the function fun(). But during this initialisation the function has not been defined. Hence an error.


To eliminate this error add the prototype of the fun() before declaration of p, as shown below:


extern int fun();    or simply  int fun();

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Q:

Isotopes are atoms of the same element that have different

A) mass numbers B) atomic numbers
C) protons D) All of the above
 
Answer & Explanation Answer: A) mass numbers

Explanation:

Isotopes are atoms of the same element that have different mass numbers.

Example : Hydrogen, Deutirium and tritium all these have different mass but same atomic numbers.

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Q:

Which is an example of a physical change?

A) Dissolving sugar in water B) Breaking glass
C) Melting of ice D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

In all the above given options, there is no chemical change or reactions takes place only the shape or physical state is changed.

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Q:

The purpose of defibrillation is to

A) prevent asystole from deteriorating into ventricular fibrillation B) stop the chaotic, disorganized contraction of the cardiac cells
C) cause a rapid decrease in the heart rate of an unstable patient D) improve the chance of cardiopulmonary resuscitation (CPR) being successful in resuscitation
 
Answer & Explanation Answer: B) stop the chaotic, disorganized contraction of the cardiac cells

Explanation:

The purpose of defibrillation is to stop the chaotic, disorganized contraction of the cardiac cells. Defibrillation is a technique used in emergency medicine to terminate ventricular fibrillation or pulseless ventricular tachycardia. It uses an electrical shock to reset the electrical state of the heart so that it may beat to a rhythm controlled by its own natural pacemaker cells.

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