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Q:

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

Assertion(A) : The steam engine was invented by James Watt.

Reason (R) : There was a problem of taking out water from flooded mines

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:

The problem of pumping out water from the flooded mines provided the need of a self working engine, which led James Watt to invent the same.

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Q:

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

Assertion(A) : Graphite is slippery and used as a lubricant.

Reason (R) : Graphite has free electrons.

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:

Graphite possesses a layer structure with two successive layers held by weak forces and able to slide over one another. So, graphite is slippery and this property finds its use as a lubricant. In graphite, each carbon atom is linked to three other carbon atoms while one electron in the carbon atom is delocalised. So, graphite has free electrons

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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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Q:

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

Assertion(A) : A little gap is left between iron rails.

Reason (R) : Iron expands in summer.

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:

Iron expands in summer. So, gaps are left between rails to allow for expansion.

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Q:

Which of the following is not the other name of attriibute?

A) Data member	B) Instance variable
C) instance	D) Data filed

Answer & Explanation Answer: C) instance

Explanation:

Instance is an object not an attribute

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Filed Under: Java

Q:

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

Assertion (A) : Carbon dioxide turns lime water milky.

Reason (R) : Carbon dioxide sullies the water.

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:

Carbon dioxide reacts with lime water (calcium hydroxide) to form milky precipitate of calcium carbonate

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Q:

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

Assertion(A) : Bangladesh imports jute from India.

Reason (R) : Bangladesh has most of the jute mills.

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) Both A and R are false.

Answer & Explanation Answer: D) Both A and R are false.

Explanation:

When Bangladesh was created after partition of India, the areas of jute production went to Bangladesh while the jute mills were left in India. So, India imports raw jute from Bangladesh.

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Filed Under: Assertion and Reason

Q:

Client code having direct access to internal data is called

A) Encapsulation	B) DataHiding
C) Polymorphism	D) DataAbstraction

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