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Category Archives: Quizzes

Which of the following is true about the below syntax ? disabled = {false} (A) rendered as disabled (B) rendered at all (C) rendered as… Read More
Which of the following is the class-based component in React.js ? (A) class (B) factory (C) render (D) props Answer: (D) Explanation: Props is the… Read More
Which of the following is used to increase the performance of the React.js ? (A) Virtual DOM (B) Original DOM (C) Shallow DOM (D) Both… Read More
What is the best definition of React.js ? (A) Server-side Framework (B) User-interface framework (C) A Library for building interaction interfaces (D) None of These… Read More
Which of the following is true about key props ? (A) “Key” props are used to look beauty (B) “Key” prop is a way to… Read More
Which function in React.js is invoked before a component gets its props reassigned ? (A) componentWillRecieveProps() (B) componentWillStopProps() (C) componentWillControlProps() (D) componentRecieveProps() Answer: (A) Explanation:… Read More
Which of the following is used to render components in web pages ? (A) DOM_render() (B) render() (C) ReactDOM_render() (D) transfer() Answer: (A) Explanation: The… Read More
Which of the following method is true about referring parent class in React.js ? (A) self() (B) inherits() (C) this() (D) super() Answer: (D) Explanation:… Read More
Which of the following function is true about changing the state in React.js ? (A) this.State{} (B) this.setState (C) this.setChangeState (D) All of the above… Read More
In React.js, how we can pass the data from one component to another in React.js ? (A) SetState (B) Render with arguments (C) Props (D)… Read More
Which of the following is true regarding Babel ? (A) Compiler (B) Transpilar (C) Both of the above (D) None of the above Answer: (C)… Read More
Which of the following is must for the API in React.js ? (A) SetinitialComponent (B) renderComponent (C) render (D) All of the above Answer: (B)… Read More
Which of the following is a way to handle data in React.js ? (A) State & Props (B) Services & Components (C) State & Services… Read More
Which of the following valid component return type of React ? (A) 2 (B) 5 (C) 1 (D) 3 Answer: (C) Explanation: The only valid… Read More
What is the default port number in which the application run ? (A) 3000 (B) 8080 (C) 5000 (D) 3030 Answer: (A) Explanation: The default… Read More

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