QUIZ

Certification Test


Que No. 1 ) What is the virtual DOM in React? A.) A physical representation of the DOM tree B.) A lightweight version of the DOM for faster rendering C.) A separate document used for testing purposes D.) A backup copy of the DOM
Que No. 2 ) Which method is used to handle user input in React forms? A.) handleChange() B.) handleSubmit() C.) handleInput() D.) handleUserInput()
Que No. 3 ) How can you prevent the default behavior of an HTML form submission in React? A.) Using the e.preventDefault() method B.) By removing the form tag C.) By using a different submit button D.) By setting the form's onSubmit attribute to false
Que No. 4 ) What is the purpose of keys in React when rendering lists? A.) They define the list item's color B.) They provide a unique identifier for each list item C.) They control the list's width D.) They define the list's sorting order
Que No. 5 ) What is the purpose of the map() function in React when rendering lists? A.) To create a new array with modified elements B.) To remove items from an array C.) To create a two-dimensional array D.) To sort the elements in an array
Que No. 6 ) How do you pass a function as a prop in React? A.) Wrap the function in quotes B.) Use the keyword "function" before the function name C.) Pass the function as a reference without parentheses D.) Use arrow notation for the function
Que No. 7 ) What is the purpose of the "key" prop in React components? A.) It defines the component's color B.) It provides a unique identifier for the component C.) It controls the component's width D.) It determines the component's sorting order
Que No. 8 ) Which method should be used to update the state when the new state depends on the previous state? A.) setState() B.) updateState() C.) setStateWithPrevious() D.) setStateBasedOnPrevious()
Que No. 9 ) How can you pass data from a child component to a parent component in React? A.) Use props B.) Use state C.) Use a callback function D.) Use Redux
Que No. 10 ) What is the purpose of the "className" attribute in React? A.) It defines the component's name B.) It sets the component's CSS class C.) It defines the component's ID D.) It specifies the component's color

Que No. 1 ) What is the virtual DOM in React?

A.) A physical representation of the DOM tree
B.) A lightweight version of the DOM for faster rendering
C.) A separate document used for testing purposes
D.) A backup copy of the DOM

Que No. 2 ) Which method is used to handle user input in React forms?

A.) handleChange()
B.) handleSubmit()
C.) handleInput()
D.) handleUserInput()

Que No. 3 ) How can you prevent the default behavior of an HTML form submission in React?

A.) Using the e.preventDefault() method
B.) By removing the form tag
C.) By using a different submit button
D.) By setting the form's onSubmit attribute to false

Que No. 4 ) What is the purpose of keys in React when rendering lists?

A.) They define the list item's color
B.) They provide a unique identifier for each list item
C.) They control the list's width
D.) They define the list's sorting order

Que No. 5 ) What is the purpose of the map() function in React when rendering lists?

A.) To create a new array with modified elements
B.) To remove items from an array
C.) To create a two-dimensional array
D.) To sort the elements in an array

Que No. 6 ) How do you pass a function as a prop in React?

A.) Wrap the function in quotes
B.) Use the keyword "function" before the function name
C.) Pass the function as a reference without parentheses
D.) Use arrow notation for the function

Que No. 7 ) What is the purpose of the "key" prop in React components?

A.) It defines the component's color
B.) It provides a unique identifier for the component
C.) It controls the component's width
D.) It determines the component's sorting order

Que No. 8 ) Which method should be used to update the state when the new state depends on the previous state?

A.) setState()
B.) updateState()
C.) setStateWithPrevious()
D.) setStateBasedOnPrevious()

Que No. 9 ) How can you pass data from a child component to a parent component in React?

A.) Use props
B.) Use state
C.) Use a callback function
D.) Use Redux

Que No. 10 ) What is the purpose of the "className" attribute in React?

A.) It defines the component's name
B.) It sets the component's CSS class
C.) It defines the component's ID
D.) It specifies the component's color

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