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I applied via Naukri.com and was interviewed in Mar 2021. There was 1 interview round.
Export types in ReactJS allow components, functions, and variables to be accessed and used in other files.
Exporting a component allows it to be imported and used in other files
Exporting a function allows it to be imported and used in other files
Exporting a variable allows it to be imported and used in other files
Hooks are functions that allow you to use state and other React features without writing a class.
useState is a hook that allows you to add state to functional components.
useEffect is a hook that allows you to perform side effects in functional components.
Hooks can only be used in functional components.
Hooks must be called at the top level of a functional component.
Hooks can be used to replace lifecycle methods in class
The 'this' keyword in JS refers to the object that is currently executing the code.
The value of 'this' depends on how a function is called.
In a method, 'this' refers to the object that the method belongs to.
In a regular function, 'this' refers to the global object (window in a browser).
In an event handler, 'this' refers to the element that triggered the event.
The value of 'this' can be explicitly set using call(), appl
setState is a method used in React to update the state of a component.
setState is asynchronous and batched for performance optimization.
It merges the new state with the previous state.
It schedules a re-render of the component and its children.
Passing a function to setState ensures the previous state is used correctly.
Example: this.setState({ count: this.state.count + 1 })
Answer to a React Developer interview question about class and functional components and passing props.
Class component: class MyComponent extends React.Component {}
Functional component: const MyComponent = (props) => {}
Passing props from parent to child:
Promises are a way to handle asynchronous operations in JavaScript. Promise.all is used to execute multiple promises concurrently.
Promises represent a value that may not be available yet
They have three states: pending, fulfilled, and rejected
Promise.all takes an array of promises and returns a new promise that resolves when all promises in the array have resolved
If any promise in the array is rejected, the returned pro...
ES6 features: Spread Operator, Rest Parameter, Object Destructuring
Spread Operator: allows an iterable to be expanded into individual elements
Rest Parameter: allows a function to accept an indefinite number of arguments as an array
Object Destructuring: allows extracting properties from an object and assigning them to variables
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I applied via Naukri.com and was interviewed in Jul 2020. There were 4 interview rounds.
I applied via Job Portal and was interviewed before Apr 2021. There was 1 interview round.
Solid principles are a set of design principles for writing maintainable and scalable code in C#.
Single Responsibility Principle (SRP) - a class should have only one reason to change
Open/Closed Principle (OCP) - a class should be open for extension but closed for modification
Liskov Substitution Principle (LSP) - derived classes should be substitutable for their base classes
Interface Segregation Principle (ISP) - client...
I applied via Campus Placement and was interviewed before Jun 2020. There were 3 interview rounds.
I applied via Company Website and was interviewed in Oct 2018. There was 0 interview round.
I applied via Naukri.com and was interviewed before Oct 2019. There were 3 interview rounds.
I applied via LinkedIn and was interviewed before Dec 2020. There was 1 interview round.
C++ is an extension of C with object-oriented programming features.
C++ supports object-oriented programming while C does not.
C++ has classes and templates while C does not.
C++ has better support for function overloading and default arguments.
C++ has a standard library that includes many useful functions.
C++ allows for both procedural and object-oriented programming.
C++ is generally considered to be a more complex langu
I applied via Naukri.com and was interviewed before Dec 2020. There were 3 interview rounds.
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