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Which of these method of ArrayList class is used to obtain present size of an object?

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Which of these method of ArrayList class is used to obtain present size of an object?

(a) size()

(b) length()

(c) index()

(d) capacity()

I had been asked this question by my college professor while I was bunking the class.

This question is from Java.util in portion java.util – The Collections Framework of Java

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Correct choice is (a) size()

To elaborate: None.

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