TypeScript for Beginners - Defining Optional Properties

The video tutorial explains how to define optional parameters in functions by using a question mark. It demonstrates how to make properties optional, allowing them to be included or omitted without causing issues. The tutorial also covers the implications of removing the question mark, which results in warnings if the property is not provided.

What symbol is used to define an optional parameter in a function?

• Hash (#)

• Question mark (?)

• Exclamation mark (!)

• Asterisk (*)

What happens if you remove an optional parameter from a function call?

• The function will return null

• The function will execute without issues

• The function will execute with default values

• The function will throw an error

What is the effect of making a parameter optional in a function?

• It becomes a required parameter

• It changes the function's return type

• It can be omitted without causing errors

• It must always be provided

What will happen if you remove the question mark from an optional parameter?

• The function will ignore the parameter

• The parameter will become required

• The parameter will be automatically set to zero

• The function will execute faster

What is the immediate consequence of removing the optional marker from a parameter?

• The function will execute normally

• The parameter will be ignored

• A warning will be issued

• The function will return an error