C++ Fundamentals Assessment

What is the purpose of an if statement in C++?

• To control the flow of execution based on a condition.

• To create loops in C++.

• To define functions in C++.

• To declare variables in C++.

Explain the difference between 'while' and 'do-while' loops.

• The main difference is that 'while' checks the condition before execution, while 'do-while' checks after execution.

• 'while' loops require a counter variable, while 'do-while' loops do not.

• 'while' loops are used for infinite loops, while 'do-while' loops are for conditional loops.

• 'while' loops can only execute once, while 'do-while' loops can execute multiple times.

What is function overloading in C++?

• Function overloading is a method to increase the speed of function execution in C++.

• Function overloading is when a function can be called multiple times in a program.

• Function overloading allows functions to have different names but perform the same task.

• Function overloading is a feature in C++ that enables multiple functions with the same name to coexist, differentiated by their parameter types or counts.

How do you define a function in C++?

• A function in C++ is defined as function_name(parameter_list) { // function body }

• Functions in C++ are declared using the syntax: function_name return_type(parameter_list)

• In C++, a function is defined with the syntax: function_name(parameter_list) -> return_type { // function body }

• A function in C++ is defined using the syntax: return_type function_name(parameter_list) { // function body }

Describe the concept of inheritance in object-oriented programming.

• Inheritance is a way to delete attributes and methods from a superclass.

• Inheritance allows a subclass to inherit attributes and methods from a superclass, promoting code reuse and establishing a class hierarchy.

• Inheritance allows a subclass to override the superclass without any restrictions.

• Inheritance is a method for creating new classes without any relationship to existing ones.

What is polymorphism and how is it achieved in C++?

• Polymorphism is the ability to create multiple instances of a class in C++.

• Polymorphism is the ability of different classes to be treated as instances of the same class through a common interface, achieved in C++ via function overloading and virtual functions.

• Polymorphism is achieved in C++ through the use of static typing only.

• Polymorphism allows classes to inherit properties from multiple parent classes.

Explain the use of access specifiers in C++ classes.

• Access specifiers determine the order of class member declarations.

• Access specifiers in C++ classes are used to control the visibility and accessibility of class members, ensuring encapsulation and data protection.

• Access specifiers are only used for function declarations.

• Access specifiers are irrelevant in C++ and can be ignored.

The scope resolution operator in C++ is represented by:

• :

• ::

• .

• *

Which of the following is a use of the scope resolution operator :: in C++?

• To define a function outside its class

• To access members of a class object

• o dereference a pointer

• To overload operators

Which operator is used to access a global variable when a local variable with the same name exists?

• &

• |

• ::

• ()