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Q:

A bag contains 600 coins of 25 p denomination and 1200 coins of 50 p denomination. If 12% of 25 p coins and 24% of 50 p coins are removed, the percentage of money removed from the bag is nearly :

A) 21.6 % B) 15.3 %
C) 14.6 % D) 12.5 %
 
Answer & Explanation Answer: A) 21.6 %

Explanation:

Total money = Rs.[600*(25/100)+1200*(50/100)]= Rs. 750.

 

25 paise coins removed = Rs. (600*12/100) = 72.

 

50 paise coins removed = Rs. (1200*24/100)= 288.

 

Money removed =Rs.(72*25/100+288*50/100)  = Rs.162.

 

Required percentage = (162/750*100)% = 21.6 %.

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Filed Under: Percentage

Q:

Which key word is to be used to tell the JVM to skip the variable while performing the serialization process of the object containing it?

A) Transcient B) Volatile
C) Static D) Final
 
Answer & Explanation Answer: A) Transcient

Explanation:

If you mark an instance variable as transient, you're telling the JVM to skip (ignore) this variable when you attempt to serialize the object containing it.

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Filed Under: Java

Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion(A)   :   When common salt is kept open, it absorbs moisture from the air. 

Reason (R)     :   Common salt contains magnesium chloride. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: A) Both A and R are true and R is the correct explanation of A.

Explanation:

Magnesium chloride present in common salt is a deliquescent substance i.e. it absorbs moisture from the air when kept in open. 

 

 

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Filed Under: Assertion and Reason

Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

Assertion (A)  :  a Leaves of plants are green. 

Reason (R)    :   Plants contain chromoplasts, the green pigment. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: C) A is true but R is false.

Explanation:

Leaves of plants are green because they contain the green pigment, chlorophyll. However, plants contain chromoplasts but they are not green pigments. 

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Filed Under: Assertion and Reason

Q:

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative 

 Assertion (A) :  Clothes are not washed properly in hard water. 

 Reason (A)    :  Hard water contains many minerals. 

A) Both A and R are true and R is the correct explanation of A. B) Both A and R are true but R is NOT the correct explanation of A.
C) A is true but R is false. D) A is false but R is true.
 
Answer & Explanation Answer: B) Both A and R are true but R is NOT the correct explanation of A.

Explanation:

Clothes are not washed properly in hard water because it does not form lather with soap. However, it is true that hard water contains many minerals. 

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Filed Under: Assertion and Reason

Q:

Which one of the following four vedas contains an account of magical charms and spells

A) Rigaveda B) Samaveda
C) Yajurveda D) Atharvaveda
 
Answer & Explanation Answer: D) Atharvaveda

Explanation:
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Filed Under: Indian History

Q:

The instrument of instructions contained in the Government of India Act, 1935 has been incorporated in the constitution of India in the year 1950 as

A) Fundamental Rights B) Directive Principles of the state Policy
C) Fundamental Duties D) Emergency provisions
 
Answer & Explanation Answer: D) Emergency provisions

Explanation:
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Filed Under: Indian Politics

Q:

A mixture contains alcohol and water in the ratio 4 : 3. If 5 liters of water is added to the mixture, the ratio becomes 4: 5. Find the quantity of alcohol in the given mixture.

A) 10 B) 12
C) 15 D) 18
 
Answer & Explanation Answer: A) 10

Explanation:

Let the quantity of alcohol and water be 4x litres and 3x litres respectively

 

4x/(3x+5) = 4/5 

 

20x = 4(3x+5)

 

8x = 20

 

x = 2.5

 

Quantity of alcohol = (4 x 2.5) litres = 10 litres.

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Filed Under: Ratios and Proportions