TypeScript for Beginners - Using a Data Type with the Rest Parameter

The video tutorial explains the concept of rest parameters in functions, emphasizing that they should always be the last parameter in the function's parameter list to avoid compilation errors. It also discusses how to restrict rest parameters to specific types, such as arrays, to ensure proper function execution. The tutorial provides examples and highlights common mistakes, such as incorrect parameter positioning and type usage.

What is the primary rule regarding the placement of rest parameters in a function's parameter list?

• They must be the last parameter.

• They can be placed anywhere.

• They must be the first parameter.

• They should be in the middle of the list.

What happens if you place a rest parameter at the beginning of a function's parameter list?

• The rest parameter will be ignored.

• The function will return undefined.

• It will cause a compilation error.

• The function will execute normally.

Which keyboard shortcut can be used to undo changes if a compilation error occurs?

• Control X

• Control Z

• Control Y

• Control C

What type must a rest parameter be restricted to?

• String

• Array

• Boolean

• Object

How can you restrict a rest parameter to accept only numbers?

• Use nums: number

• Use nums: string[]

• Use nums: number[]

• Use nums: boolean[]