Questions

Q:

The ratio of volume of a cone to that of a cylinder if cylinder radius is reduced by 4 times and its height increased by 8 times of that of the cone, is - 

A) 3:2 B) 2:3
C) 5:7 D) 7:5
 
Answer & Explanation Answer: B) 2:3

Explanation:

Ans. Let radius of the base and height of the cone be ‘r’ & ‘h’ respectively.

Then volume of cone = πr2h/3 For cylinder, radius is reduced by 4 times = r/4 And,  height is increased by 8 folds = 8h Volume of cylinder = πR2H = π(r/4)2 (8h) = (16/8)πr2h = πr2h/2 Ratio of volume of cone to volume of cylinder = (πr2h/3) : (πr2h/2) Or, Ratio = 2 : 3.

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Q:

What is risk analysis? What does it have to do with Severity and Priority?

Answer

Risk analysis is a method to determine how much risk is involved in something. In testing, it can be used to determine when to test something or whether to test something at all. Items with higher risk values should be tested early and often. Items with lower risk value can be tested later, or not at all. It can also be used with defects. Severity tells us how bad a defect is: "how much damage can it cause?" Priority tells us how soon it is desired to fix the defect: "should we fix this and if so, by when?"


Defects with High Severity and Priority are tested first.

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Subject: Software Testing

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Q:

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

 

She is walking (1)/ in the park (2)/ since morning. (3)/ No error (4)

 

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: A) 1

Explanation:
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Filed Under: English
Exam Prep: Bank Exams , GRE , TOEFL

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Q:

Acceleration is the rate of change of

A) Speed B) Velocity
C) Jerk D) Jounce
 
Answer & Explanation Answer: B) Velocity

Explanation:

The rate of change of velocity is called as Acceleration.

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Filed Under: Physics
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Q:

Which of the following is a renewable resource of energy?

A) Hydrogen fuel B) Wind energy
C) Solar energy D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Renewable energy is energy that is collected from renewable resources, which are naturally replenished on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat.

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Filed Under: Physics
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Q:

Improve the bracketed part of the sentence.
The exhausted travellers seemed relieved when the train finally (came into) the station.

A) pulled in B) pulled into
C) pulled onto D) no improvement
 
Answer & Explanation Answer: A) pulled in

Explanation:
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Q:

How does molecular shape affect polarity?

Answer

Polarity :: 


The polarity of a molecule defines its other physical properties such as melting point, boiling point, surface tension, vapor pressure etc... Simply, polarity occurs when the electron distribution in a molecule is asymmetric. This results in a net dipole moment in the molecule. One end of the molecule is charged negative while the other gets a positive charge.


 


The polarization of a molecule greatly depends on the shape of the molecule. A diatomic molecule like HF mentioned above has no issue of shape. The net dipole moment is only due to the uneven distribution of electrons between the two atoms. However, when there are more than two atoms involved in making a bond, there are many complexities.


 


The water molecule is of bent shape. Therefore, when the two pair of electrons shared by oxygen with two hydrogen atoms is pulled towards oxygen, the net dipole moment results in the direction of the oxygen atom. There is no other force to cancel out the resultant dipole moment. Hence, the water molecule is highly polar.


 


Ammonia molecule is of a pyramid shape and the electronegative N atom pulls the electrons towards itself. The three N-H bonds are not in the same plane; hence the dipole moments created do not get canceled out. This makes ammonia a polar molecule.


 


However, the dipole moments sometimes get canceled due to the shape of the molecules, making the molecule non-polar. Carbon dioxide is such a molecule.

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Subject: Chemistry Exam Prep: AIEEE , Bank Exams , CAT , GATE
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Q:

Solve the below puzzle, A rich man needs a poor man has...

A Rich man needs it,

The poor man has it,

If you eat it, you will die.

 

What is That?

Answer

NOTHING.


 


A rich man needs nothing, a poor man has nothing with him, and if we eat nothing, we will die.

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Subject: Word Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GRE , TOEFL
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