ReactJS OVerview Unit 11-18

Which of the following is true regarding Babel ? (2 correct answers)

• A compiler 

• A transpiler 

• A framework

• A programming language

What "_____case" does React DOM use for naming attributes and properties?

• Camel (camelCase) 

• Pascal (PascalCase) 

• Snake (snake_case) 

• Kebab (kebab-case) 

What are the smallest building blocks of React apps

• Components

• Functions

• Elements

• JSX

A component name must start with ________.

• a lowercase letter

• a capital letter

• a number

• everything

Which component lifecycle method runs after the component output has been rendered to the DOM?

• componentMounted() 

• componentRendered() 

• componentDidMount() 

• componentDidRender() 

Which component lifecycle method is used to perform the cleanup when the component is removed from the DOM? 

• componentUnmounted() 

• componentWillUnmount() 

• componentDidUnmount() 

• None of the above

State of a component is often called ___ data? 

• public

• protected

• private

• local or encapsulated 

In order to prevent a component from rendering it should return ___? 

• undefined

• false

• null

• empty string

Which of the following activities do we perform while declaring useState in React? 

• Object destructuring 

• Unpacking object 

• Array destructuring 

• Unpacking array 

How does React remember which state variable belongs to which useState call?

• It makes a lookup table  

• It remembers the calling order  

• It traverses the calls again, whenever needed  

• None of the above