Online Test ReactJS

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You have 6 minute to answer 19 questions, after that you will not be able to continue the test.

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Pre and post lifecycle methods of components are represented using
A parent component could access or read its children components properties
Which of the following methods change the state of the component?
Which of the following is used to trigger a UI update?
Life cycle methods of a components fall under following categories?
PropTypes is used for

ReactJS renders Components (classes) if the element is defined in

ReactJS renders HTML tags if the element is defined in
The value of textarea is set using its children in the same way like HTML
Which of the following mounting methods is/are invoked before the component is inserted into DOM?
A component can mutate its properties as and when required
The default value of input field could be set using which of the following attribute?
One can define default values for properties, props, using which of the following method?
Data flow from owner to owned components using which of the following?
To use native javascript as an attribute value, the expression should be wrapped within
An owner component defines its children component within render method
Mixins are used to take care of cross-cutting concerns
Input field that does not supply a value is called as
Change or update to large number of nodes is optimized using which of the following techniques?

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