OodlesTechnologies Front end Developer Interview Questions, Process, and Tips

Q1. Bascis of javascipt and react.js questions.
Add your answer

Q1. Basic of node.js and basic mongo queries
Add your answer

Aptitutde test was easy asking qued about web technologies

Q1. Questions were about javascript mainly.
Add your answer

Round duration - 60 minutes
Round difficulty - Medium

Technical Interview round with questions based on Javascript mainly.

Q1. What are the data types in JavaScript?
Ans. 
JavaScript data types include string, number, boolean, object, function, undefined, and null.
• String: 'hello'

• Number: 42

• Boolean: true or false

• Object: { key: 'value' }

• Function: function() { }

• Undefined: undefined

• Null: null
Answered by AI
View 2 more answers
Q2. What is the typeof() operator in JavaScript?
Ans. 
typeof() operator in JavaScript is used to determine the data type of a variable or expression.
• typeof() returns a string indicating the type of the operand.

• Example: typeof 42 will return 'number'.

• Example: typeof 'hello' will return 'string'.
Answered by AI
View 1 more answer
Q3. What is the return type of the getElementsByClassName method in JavaScript?
Ans. 
The return type of getElementsByClassName method in JavaScript is an array of elements.
• The method returns an array of elements that have a specified class name.

• The elements are returned in the order they appear in the document.

• If no elements are found with the specified class name, an empty array is returned.
Answered by AI
View 3 more answers
Q4. Is JavaScript single-threaded or multi-threaded?
Ans. 
JavaScript is single-threaded.
• JavaScript is single-threaded, meaning it can only execute one piece of code at a time.

• This is because JavaScript runs in the browser's main thread, which is responsible for handling user interactions, rendering, and running JavaScript code.

• Asynchronous operations in JavaScript, such as AJAX requests and setTimeout, allow for non-blocking code execution without the need for multi-threading...read more
Answered by AI
Add your answer
Q5. Can you explain the Async/Await function in JavaScript?
Ans. 
Async/Await is a feature in JavaScript that allows for easier handling of asynchronous code.
• Async/Await is built on top of Promises and provides a more readable and concise way to work with asynchronous code.

• The 'async' keyword is used to define a function as asynchronous, allowing the use of 'await' inside it to pause execution until a Promise is settled.

• Using Async/Await can help avoid callback hell and make code mor...read more
Answered by AI
View 1 more answer

Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions based on Angular mainly.

Q1. How does one share data between components in Angular?
Ans. 
Data can be shared between components in Angular using services, input/output properties, and observables.
• Use services to create a shared data service that can be injected into multiple components

• Use input/output properties to pass data from parent to child components

• Use observables to create a data stream that can be subscribed to by multiple components
Answered by AI
View 1 more answer
Q2. What are the different types of data binding in Angular?
Ans. 
Types of data binding in Angular include interpolation, property binding, event binding, two-way binding.
• Interpolation: {{ data }}

• Property binding: [property]="data"

• Event binding: (event)="function()"

• Two-way binding: [(ngModel)]="data"
Answered by AI
Add your answer