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Questions and Answers
What does the null coalescing operator (??) return if the left operand is null?
What does the null coalescing operator (??) return if the left operand is null?
- It returns an error message
- It returns the left operand
- It returns a null reference exception
- It returns the right operand (correct)
When is the null conditional operator (?.) used?
When is the null conditional operator (?.) used?
- To check if an object is null or not
- To divide two numbers
- To access object members only if the object is not null (correct)
- To concatenate strings
Which data type in C# is more suitable for financial calculations or where precision is critical?
Which data type in C# is more suitable for financial calculations or where precision is critical?
- double
- decimal (correct)
- float
- int
What does double represent in C#?
What does double represent in C#?
Why is understanding fundamental concepts and syntax in C# programming important?
Why is understanding fundamental concepts and syntax in C# programming important?
What is the purpose of using the 'readonly' keyword in C# properties?
What is the purpose of using the 'readonly' keyword in C# properties?
In C#, what is the main difference between structs and classes?
In C#, what is the main difference between structs and classes?
When declaring a nullable type in C#, what symbol is appended to the type name?
When declaring a nullable type in C#, what symbol is appended to the type name?
What does the 'ref' keyword allow in C# programming?
What does the 'ref' keyword allow in C# programming?
Which keyword is used in C# when a method is expected to assign a value to a variable?
Which keyword is used in C# when a method is expected to assign a value to a variable?
What does it mean when a variable is declared with an auto-implemented property in C#?
What does it mean when a variable is declared with an auto-implemented property in C#?
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