C# Data Types and Operations

What is type conversion in C#?

• Type conversion in C# is the act of renaming a variable to improve readability.

• Type conversion in C# is the process of converting a variable from one data type to another, either implicitly or explicitly.

• Type conversion in C# is the process of changing the color of a variable.

• Type conversion in C# refers to the method of optimizing memory usage.

Explain implicit type conversion with an example.

• Example: In JavaScript, `5 + 5` results in `10` because both are numbers.

• Example: In JavaScript, `5 + '5'` results in `'55'` because the number 5 is implicitly converted to a string.

• Example: In JavaScript, `5 - '5'` results in `0` because the string is ignored.

• Example: In JavaScript, `5 * '5'` results in `25` because the string is converted to a number.

What is explicit type conversion?

• Explicit type conversion is the same as type inference.

• Explicit type conversion is the intentional conversion of a variable from one data type to another.

• Type conversion only occurs in programming languages with dynamic typing.

• Implicit type conversion is automatic and unintentional.

How do you convert a string to an integer in C#?

• Use int.Parse() or Convert.ToInt32() methods.

• Use Convert.ToString() method.

• Use string.ToInteger() method.

• Use float.Parse() to convert the string.

What is the purpose of the 'as' operator in C#?

• The 'as' operator is used for exception handling.

• The 'as' operator is used for creating new classes.

• The 'as' operator is used for safe type casting.

• The 'as' operator is used for defining variables.

What is the difference between 'is' and 'as' operators?

• 'is' checks type; 'as' checks identity.

• 'is' performs type casting; 'as' checks equality.

• 'is' checks value; 'as' checks reference.

• 'is' checks identity; 'as' performs type casting.

What are the arithmetic operators available in C#?

• +, -, *, /, %

• <, >, <=, =>

• ++, --, **, //

• &, |, ^, ~

How do you perform a modulus operation in C#?

• Use the 'mod' function to perform a modulus operation.

• Use the '%' operator to perform a modulus operation.

• Use the '#' operator to perform a modulus operation.

• Use the '%' symbol for division instead of modulus.

What is the result of 5 / 2 in C#?

• 3

• 2

• 2.5

• 1

Explain the use of the increment (++) operator in C#.

• The increment (++) operator multiplies a variable's value by two in C#.

• The increment (++) operator increases a variable's value by one in C#.

• The increment (++) operator is used to concatenate strings in C#.

• The increment (++) operator decreases a variable's value by one in C#.