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Question 116Asked in BPSC TRE 1.0 (2023) Computer Science Class 11-12

Which of the following can be used to create an abstract class in the C++ programming language?

  1. ABy using the pure virtual function in the class
  2. BBy declaring a virtual function in the base class
  3. CBy declaring the virtual keyword afterward the class declaration
  4. DMore than one of the above
  5. ENone of the above
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Correct answer: (A) By using the pure virtual function in the class

Explanation

A class becomes abstract when it has at least one pure virtual function, for example virtual void f() = 0;. Such a class cannot be instantiated.

From BPSC TRE 1.0 (2023) Computer Science Class 11-12 — Previous Year Paper

This is question 116 of BPSC TRE 1.0 (2023) Computer Science Class 11-12 — Previous Year Paper. 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.