Zidio Development Interview Questions and Answers

Functional components are simpler and stateless, while class components are more complex and can manage state and lifecycle methods.

• Functional components are defined as JavaScript functions, e.g., `const MyComponent = () => { return <div>Hello</div>; }`.

• Class components are ES6 classes that extend `React.Component`, e.g., `class MyComponent extends React.Component { render() { return <div>Hell...read more

Components in React are reusable, self-contained pieces of UI that manage their own state and can be composed to build complex interfaces.

• Components can be functional or class-based. Example: `function MyComponent() { return <div>Hello</div>; }`

• They can accept props to customize their behavior. Example: `<MyComponent name='John' />`.

• Components can manage their own state using the `useState` hook ...read more

In JavaScript, == checks for value equality, while === checks for both value and type equality.

• == (loose equality) converts types if they are different: 5 == '5' is true.

• === (strict equality) does not convert types: 5 === '5' is false.

• Use === to avoid unexpected type coercion and ensure both value and type match.

• Example: null == undefined is true, but null === undefined is false.

React hooks like useState and useEffect manage state and side effects in functional components, enhancing code reusability and readability.

• useState allows functional components to manage local state. Example: const [count, setCount] = useState(0);

• useEffect handles side effects like data fetching or subscriptions. Example: useEffect(() => { fetchData(); }, []);

• Both hooks promote cleaner code by avoiding class co...read more

The virtual DOM is a lightweight representation of the actual DOM, enabling efficient updates and rendering in web applications.

• The virtual DOM is a concept used in libraries like React to optimize rendering performance.

• It allows developers to make changes to the UI without directly manipulating the actual DOM, which can be slow.

• When a change occurs, a new virtual DOM is created, and a diffing algorithm determines...read more

Props are inputs to components, while state is managed within components. They serve different purposes in React.

• Props are read-only and passed from parent to child components.

• State is mutable and managed within the component itself.

• Example of props: <ChildComponent name='John' />

• Example of state: this.setState({ count: this.state.count + 1 })

• Props are used for configuration, while state is used for dynamic ...read more

My passion for creativity and technology drives my interest in Zideo development, where I can create engaging digital experiences.

• I have always been fascinated by storytelling, and Zideo development allows me to combine narrative with visual elements.

• During my college project, I created a short animated video that received positive feedback, sparking my interest in this field.

• The rapid evolution of technology exci...read more

Discussed previous design projects, focusing on user experience and visual aesthetics.

• Worked on a mobile app redesign that improved user engagement by 30%.

• Created a branding package for a startup, including logo, color palette, and typography.

• Designed an e-commerce website that streamlined the checkout process, reducing cart abandonment rates.