Type Aliases in TypeScript

A function that defines a new type

A way to create a new name for an existing type

A reserved keyword for defining interfaces

A feature used only for primitive types

By providing an alias for complex data structures

By making primitive types more readable

By replacing all interfaces with type aliases

By reducing the number of functions in the code

Defining a complex object structure

Creating a union of multiple types

Assigning a name to a function signature

All of the above

Type aliases can define primitive types, whereas interfaces cannot

Interfaces support method merging, whereas type aliases do not

Type aliases are always preferred over interfaces

Interfaces can define union types, whereas type aliases cannot

A variable with a single type

A type that can hold only one value

A type that combines multiple possible types

A type that restricts values to numbers only

Yes, type aliases can be used to define function signatures

No, only interfaces can define function signatures

Only when using classes

Only with arrow functions

It will work as expected

It will throw a TypeScript error

It will merge with the existing type

It will be ignored by the TypeScript compiler

Using the | (pipe) operator for union types

Using the & (ampersand) operator for intersection types

Both a and b

Type aliases cannot be combined

42

"42"

undefined

Compilation erro

To define primitive types

To define complex object structures with unions

To define function signatures

All of the above