C++ Concepts Mastery

What are the basic data types in C++?

• int, float, string, long, short

• char, double, void, long, short

• int, float, double, char, bool

• string, array, void, long, short

Explain the difference between while and do-while loop in C++.

• The while loop and do-while loop are the same and can be used interchangeably

• The while loop checks the condition before executing the code inside the loop, while the do-while loop executes the code inside the loop at least once before checking the condition.

• The while loop executes the code inside the loop at least once before checking the condition

• The do-while loop checks the condition before executing the code inside the loop

What is the scope of a variable declared inside a function in C++?

• Limited to the function in which it is declared

• Accessible from any function in the program

• Limited to the block in which it is declared

• Accessible only from the main function

How can you open a file in C++ for writing?

• ofstream myfile("example.txt");

• openfile myfile('example.txt');

• ofstream myfile = open('example.txt');

• writefile myfile('example.txt');

What is the purpose of the 'return' statement in a function in C++?

• To pause the execution of the function

• To exit the function and return a value to the calling code.

• To print a message to the console

• To skip the rest of the code in the function

What is the syntax for declaring a multi-dimensional array in C++?

• arrayName[size1, size2, ..., sizeN] = dataType;

• arrayName[size1][size2]...[sizeN];

• dataType arrayName[size1][size2]...[sizeN];

• dataType arrayName[size1, size2, ..., sizeN];

How can you read data from a file in C++?

• Using the cin object to read from the file

• Using the ifstream class and its member functions

• Using the ofstream class and its member functions

• Using the fstream class and its member functions

Explain the concept of function overloading in C++.

• Function overloading in C++ allows multiple functions with the same name and same parameters to be defined within the same scope.

• Function overloading in C++ allows only one function with a specific name to be defined within the same scope.

• Function overloading in C++ allows multiple functions with different names but same parameters to be defined within the same scope.

• Function overloading in C++ allows multiple functions with the same name but different parameters to be defined within the same scope.

What is the use of 'break' statement in C++?

• To terminate the loop or switch statement and transfer the control to the next statement after the loop or switch.

• To create a new variable

• To print a message on the screen

• To add two numbers together

How can you close a file in C++?

• end()

• shut()

• stop()

• close()