React Js Online Test

1. Server side Framework

2. User-interface framework

3. A Library for building interaction interfaces

4. None of These

Correct Answer : C

1. To invoke code after the setState operation is done

2. To replace the state completely instead of the default merge action

3. To access the previous state before the setState operation

Correct Answer : A

1. Props

2. State

3. RenderComponent

4. Render

Correct Answer : D

1. componentWillReceiveProps

2. shouldComponentUpdate

3. componentWillMount

4. componentDidMount

Correct Answer : C

1. style={{font-size:12,color:'red'}}

2. style={{fontSize:'12px',color:'red'}}

3. style={fontSize:'12px',color:'red'}

4. style={{font-size:12px,color:'red'}}

Correct Answer : B

1. Inside js/components/

2. Inside vendor/components/

3. Inside external/components/

4. Inside vendor/

Correct Answer : A

1. A persistent storage.

2. An internal data store (object) of a component.

Correct Answer : B

1. Keys

2. Props

3. Elements

4. Ref

Correct Answer : B

1. When the new state should completely replace the old state

2. When the new state depends on the old state

3. When the new state does not depend on the old state

Correct Answer : B

1. willComponentUpdate

2. shouldComponentUpdate

3. componentDidUpdate

4. componentDidMount

Correct Answer : B

1. A transpiler

2. An interpreter

3. A Compiler

4. Both Compiler and Transpilar

Correct Answer : D

1. Do not requires to be unique

2. Unique in the DOM

3. Unique among the siblings only

4. All of the above

Correct Answer : C

1. <

2. ->

3. >

4. =>

Correct Answer : D

1. getWillState

2. getInitialState

3. getPropsValue

4. getDefaultProps

Correct Answer : D

1. 1

2. 2

3. Multiple Elements

Correct Answer : C

1. setInitialnumber

2. setState

3. setnumber

4. setNewnumber

Correct Answer : B

1. An input element with the controlled flag

2. An input element whose value is being controlled by a component’s state

3. An input element that can only accept a list of characters

4. An input element that is controlled by the value of another input element

Correct Answer : B

1. Dispatcher->Action->Store->View

2. Action->Dispatcher->Store->View

3. Action->Store->Dispatcher->View

4. Action->Dispatcher->View->Store

Correct Answer : B

1. getInitialState, componentWillMount

2. Mounting, Unmounting

3. Before, After

4. Will, Did

Correct Answer : D

1. one way data flow

2. Two way data flow

3. No one

Correct Answer : A

1. It will be rendered as enabled

2. It will be rendered as disabled

3. It will not be rendered at all

Correct Answer : A

1. Using the reduce array method

2. With a for/while loop

3. Using the <Each /> component

4. Using the Array.map() method

Correct Answer : D

1. Mounting, Updating

2. Mounting, Unmounting

3. Mounting, Updating, Unmounting

4. None of these

Correct Answer : C

1. this.getState()

2. this.values

3. this.prototype.stateValue

4. this.state

Correct Answer : B

1. componentDidUpdate

2. componentDidMount

3. componentMounted

4. componentUpdated

Correct Answer : B

1. Flux

2. JSX

3. Dom

4. Props

Correct Answer : A

1. Module

2. Component

3. Package

4. Class

Correct Answer : B

1. Yes

2. No

Correct Answer : A

1. Original DOM

2. Virtual DOM

3. Both 1 & 2

4. None of above

Correct Answer : B

1. React.mount()

2. ReactDOM.start()

3. ReactDOM.render()

4. React.render()

Correct Answer : C