C++ Basics for Grade 12 Students

What is a variable in C++?

• A variable in C++ is a function that performs a specific task.

• A variable in C++ is a type of loop used for iteration.

• A variable in C++ is a constant value that cannot be changed.

• A variable in C++ is a named storage location that can hold a value of a particular data type.

List the basic data types in C++.

• string

• void

• array

• int, float, double, char, bool

Explain the difference between '==' and '=' operators in C++.

• '==' is used for bitwise operations, '=' is used for logical operations.

• '==' is for assignment, '=' is for comparison in C.

• '==' is for comparison, '=' is for assignment.

• '==' is for assignment, '=' is for comparison.

What are the different types of control structures in C++?

• pointers, classes, inheritance

• if-else, switch-case, functions

• if-else, switch-case, loops (for, while, do-while), jump statements (break, continue, return, goto)

• conditions, loops, variables

How do you declare a constant variable in C++?

• const int myConstant = 5;

• constant int myConstant = 5;

• const myConstant = 5;

• int myConstant = 5;

What is the '&&' operator used for in C++?

• Addition operation

• Logical OR operation

• Logical AND operation

• Bitwise AND operation

Give an example of a for loop in C++.

• for(int i = 0; i < 10; i+=2) { cout << i << endl; }

• for(int i = 5; i > 0; i--) { cout << i << endl; }

• for(int i = 0; i < 5; i++) { cout << i << endl; }

• for(int i = 0; i <= 5; i++) { cout << i << endl; }

What is the purpose of the 'switch' statement in C++?

• It is used to execute different blocks of code based on the value of a specified expression.

• It is used to repeat a block of code multiple times

• It is used to handle exceptions in the code

• It is used to define a new data type

Explain the concept of 'if-else' statement in C++.

• The 'if-else' statement in C++ is used for decision-making and branching in the program flow.

• The 'if-else' statement in C++ is used for looping through arrays.

• The 'if-else' statement in C++ is used for defining functions.

• The 'if-else' statement in C++ is used for printing text on the screen.

How do you declare and initialize a variable in C++?

• int num = 5;

• bool num = true;

• float num = 5.0;

• string num = '5';