C++ Quiz - CodingKite

C++ Quiz

1 / 20

What is the difference between struct and class in C++?

"struct" members are public by default, while "class" members are private by default.

"struct" members are private by default, while "class" members are public by default.

There is no difference.

"struct" cannot have member functions, while "class" can.

2 / 20

Which of the following is the correct way to declare a pointer to an integer in C++?

int p;

int* p;

int& p;

int p*;

3 / 20

What is the output of the following code?

int a = 5;int b = 10;std::cout << (a + b) << std::endl;

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510

4 / 20

Which of the following operators cannot be overloaded in C++?

5 / 20

What is a correct way to allocate memory dynamically for an array of 10 integers?

int* array = new int(10);

int* array = new int[10];

int* array = malloc(10 * sizeof(int));

int array[10];

6 / 20

Which of the following is not a valid C++ data type?

int

float

bool

real

7 / 20

What does the keyword virtual signify in a method declaration?

The method can be called without an object.

The method can be overridden in derived classes.

The method is a static method.

The method is abstract.

8 / 20

What is the use of the friend keyword in C++?

To define a method that can be called without an object.

To allow a function or another class to access private or protected members of the class.

To declare a global function.

To create a function template.

9 / 20

int x = 5;int& ref = x;ref = 10;std::cout << x << std::endl;

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Error

10 / 20

Which of the following is the correct syntax to define a template class?

template class MyClass {}

template MyClass {}

11 / 20

What does RAII stand for in C++?

Resource Acquisition Is Initialization

Resource Allocation Is Initialization

Resource Acquisition Is Implementation

Resource Allocation Is Implementation

12 / 20

Which of the following is not a valid C++11 feature?

Lambda expressions

Range-based for loops

nullptr

Import statements

13 / 20

What is the purpose of the std::move function in C++11?

To perform a deep copy of an object.

To convert an l-value to an r-value reference.

To copy an object.

To swap two objects.

14 / 20

What is a lambda expression in C++?

An anonymous function object.

A preprocessor directive.

A type of template.

A pointer to a function.

15 / 20

What is the output of the following code?

#include <iostream>void func(int a, int b = 20) {    std::cout << a << " " << b << std::endl;}int main() {    func(10);    return 0;}

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10 10

10 20

20 10

Error

16 / 20

Which of the following is true about constructors in C++?

Constructors cannot be overloaded.

Constructors must have a return type.

Constructors are called automatically when an object is created.

Constructors can only be defined in the public section of a class.

17 / 20

Which of the following is a correct statement about destructors in C++?

Destructors can be overloaded.

Destructors must have a return type.

Destructors are called automatically when an object goes out of scope.

Destructors can take arguments.

18 / 20

What does the override keyword indicate in C++11?

That a function is a pure virtual function.

That a function is intended to override a base class function.

That a function is static.

That a function is inline.

19 / 20

What is the difference between delete and delete[]?

"delete" is used for single objects, delete[] is used for arrays.

"delete" is used for arrays, delete[] is used for single objects.

"delete" calls destructors, delete[] does not.

There is no difference.

20 / 20

Which of the following is a valid C++11 range-based for loop?

for (int i : array) {}

for (int i = 0; i < n; ++i) {}

for (int i in array) {}

for each (int i in array) {}

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The average score is 55%