C/C MCQ Quiz Hub

C Programming MCQS Set-2

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 Which of the following is correct about new and malloc?

1. Both are available in C
2. Pointer object initialization of a class with both new and malloc calls the constructor of that class
3. Pointer object initialization of a class using new involves constructor call whereas using malloc does not involve constructor call
4. Pointer object initialization of a class using malloc involves constructor call whereas using new does not involve constructor call

✅ Correct Answer: 4

What is virtual inheritance?

1. C++ technique to avoid multiple copies of the base class into children/derived class
2. C++ technique to avoid multiple inheritances of classes
3. C++ technique to enhance multiple inheritance
4. C++ technique to ensure that a private member of the base class can be accessed somehow

✅ Correct Answer: 1

What is the difference between delete and delete[] in C++?

1. delete is used to delete normal objects whereas delete[] is used to pointer objects
2. delete is a keyword whereas delete[] is an identifier
3. delete is used to delete single object whereas delete[] is used to multiple(array/pointer of) objects
4. delete is syntactically correct but delete[] is wrong and hence will give an error if used in any case

✅ Correct Answer: 3

Which of the following is correct about new and malloc? i) new is an operator whereas malloc is a function ii) new calls constructor malloc does not iii) new returns required pointer whereas malloc returns void pointer and needs to be typecast

1. i and ii
2. ii and iii
3. i and iii
4. i ii and iii

✅ Correct Answer: 4