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Question 41

Which constructor will be called by the following lines of code.?

Which constructor will be called by the following lines of code.? (i) Student S1; (ii) Student S2 = S1
  1. AFirst copy constructor, then default constructor.
  2. BFirst default constructor, then copy constructor.
  3. CDefault constructors for both lines of code.
  4. DCopy constructors for both lines of code.
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Correct answer: (B) First default constructor, then copy constructor.

Explanation

Student S1; creates an object with no arguments, so the default constructor is called. Student S2 = S1; initialises a new object from an existing one, so the copy constructor is called.

From DSSSB TGT Computer Science Practice Set 1

This is question 41 of DSSSB TGT Computer Science Practice Set 1. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.