C++ Basics

What is the difference between int and double data types in C++?

• int is for characters, double is for strings

• int is for integers, double is for floating-point numbers

• int is for boolean values, double is for arrays

• int is for floating-point numbers, double is for integers

Explain the concept of increment and decrement operators in C++ with examples.

• Example of increment operator: int x = 5; x++; // x is now 6. Example of decrement operator: int y = 10; y--; // y is now 9.

• Example of decrement operator: int y = 10; y++; // y is now 11.

• Example of increment operator: int x = 5; x--; // x is now 4.

• Increment operator increases the value by 2: int z = 7; z++; // z is now 9.

How can you take user input in C++?

• Use 'cout' object with '<<' operator

• Use 'gets' function

• Use 'cin' object with '>>' operator

• Use 'scanf' function

What is the output of the following code snippet: cout << (5 + 3) * 2;

• 14

• 16

• 20

• 10

What is the purpose of the 'cin' object in C++?

• To read input from the standard input stream

• To handle exceptions in the code

• To write output to the standard output stream

• To perform mathematical calculations

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

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

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

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

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

Explain the 'endl' keyword in C++ and its significance in output streams.

• The 'endl' keyword is significant in output streams as it not only moves the cursor to the next line but also ensures that the output is immediately displayed by flushing the buffer.

• The 'endl' keyword in C++ is used to define a function

• The 'endl' keyword in C++ is used to perform mathematical operations

• The 'endl' keyword in C++ is used to declare a variable

What is the modulus operator (%) used for in C++?

• It is used to multiply two numbers

• It is used to compare two values

• It is used to concatenate strings

• It is used to find the remainder of a division operation.

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

• int const myConstant = 5;

• const int myConstant = 5;

• constant int myConstant = 5;

• const myConstant = 5;

What is the difference between '<<' and '>>' operators in C++?

• The '<<' operator is the bitwise AND operator and the '>>' operator is the bitwise OR operator.

• The '<<' operator is the assignment operator and the '>>' operator is the comparison operator.

• The '<<' operator is the addition operator and the '>>' operator is the subtraction operator.

• The '<<' operator is the left shift operator and the '>>' operator is the right shift operator.