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OodlesTechnologies React Developer Interview Questions, Process, and Tips

Updated 21 Mar 2022

OodlesTechnologies React Developer Interview Experiences

1 interview found

I appeared for an interview in Nov 2021.

Round 1 - Video Call 

(4 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical round with questions on React mainly.

  • Q1. What are the differences between functional and class components in React?
  • Ans. 

    Functional components are simpler and easier to test, while class components have more features and lifecycle methods.

    • Functional components are written as JavaScript functions, while class components are written as ES6 classes.

    • Functional components are stateless and do not have their own internal state, while class components can have state.

    • Functional components do not have lifecycle methods, while class components hav...

  • Answered by AI
  • Q2. What are props in React?
  • Ans. 

    Props are read-only properties passed from a parent component to a child component in React.

    • Props allow data to be passed down the component tree.

    • Props are immutable and cannot be modified by the child component.

    • Props can be used to customize the behavior or appearance of a component.

    • Props are accessed using the dot notation, like this.props.propName.

    • Props can be any type of data, including strings, numbers, objects, o

  • Answered by AI
  • Q3. What is useState() in React?
  • Ans. 

    useState() is a React hook that allows functional components to manage state.

    • useState() is used to declare a state variable in a functional component.

    • It returns an array with two elements: the current state value and a function to update the state.

    • The initial state value is passed as an argument to useState().

    • The state can be updated by calling the update function returned by useState().

    • useState() can be used multiple ...

  • Answered by AI
  • Q4. What are custom hooks in React?
  • Ans. 

    Custom Hooks are reusable functions in React that allow you to extract logic from components.

    • Custom Hooks are functions that start with the word 'use' and can call other Hooks if needed.

    • They are used to share stateful logic between components without using higher-order components or render props.

    • Custom Hooks can be used to handle common tasks like fetching data, managing form state, or subscribing to events.

    • They promot...

  • Answered by AI
Round 2 - Video Call 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical round with questions on Javascript mainly. Some output based questions on Javascript were also discussed.

  • Q1. Can you explain hoisting in JavaScript?
  • Ans. 

    Hoisting is a JavaScript behavior where variable and function declarations are moved to the top of their scope.

    • Variable declarations are hoisted but not their initializations.

    • Function declarations are fully hoisted.

    • Hoisting can lead to unexpected behavior if not understood properly.

  • Answered by AI
  • Q2. Does a const variable make the value immutable in JavaScript?
  • Ans. 

    No, const does not make the value immutable.

    • const only makes the variable itself immutable, not the value it holds.

    • For objects and arrays, const prevents reassignment but allows mutation of properties or elements.

    • To make a value truly immutable, you can use Object.freeze() or other techniques.

  • Answered by AI
  • Q3. What are the states of a promise object in JavaScript?
  • Ans. 

    The states of a promise object are pending, fulfilled, or rejected.

    • A promise starts in the pending state.

    • When a promise is resolved, it transitions to the fulfilled state.

    • If a promise encounters an error, it transitions to the rejected state.

    • Once a promise is settled (fulfilled or rejected), it cannot transition to any other state.

  • Answered by AI
Round 3 - HR 

Round duration - 30 minutes
Round difficulty - Easy

HR round with typical Behavioral problems.

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAOodles Technologies Pvt Ltd interview preparation:Topics to prepare for the interview - React, Javascript, HTML, CSS, Web Development, DSATime required to prepare for the interview - 6 monthsInterview preparation tips for other job seekers

Tip 1 : Watch all videos of Akshay Saini on youtube. [Namaste JavaScript]
Tip 2 : Practice some output questions from Namaste JavaScript.
Tip 3 : Basic knowledge of React from any source.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview questions from similar companies

I appeared for an interview before Mar 2021.

Round 1 - Coding Test 

Round duration - 30 minutes
Round difficulty - Medium

This was a MCQ round. 30 ques in 30 mins consisting of difficult quantitative aptitude questions were to be solved.

Round 2 - Coding Test 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Medium

In this test round, 2 coding questions were given. Either write the code or pseudo code

  • Q1. 

    N Queens Problem

    Given an integer N, find all possible placements of N queens on an N x N chessboard such that no two queens threaten each other.

    Explanation:

    A queen can attack another queen if they ar...

  • Ans. 

    The N Queens Problem involves finding all possible placements of N queens on an N x N chessboard without threatening each other.

    • Use backtracking algorithm to explore all possible configurations.

    • Keep track of rows, columns, and diagonals to ensure queens do not threaten each other.

    • Generate all valid configurations and print them out.

  • Answered by AI
  • Q2. 

    Sort 0 1 2 Problem Statement

    Given an integer array arr of size 'N' containing only 0s, 1s, and 2s, write an algorithm to sort the array.

    Input:

    The first line contains an integer 'T' representing the n...
  • Ans. 

    Sort an array of 0s, 1s, and 2s in linear time complexity.

    • Use three pointers to keep track of 0s, 1s, and 2s while traversing the array.

    • Swap elements based on the values encountered to sort the array in-place.

    • Time complexity should be O(N) and space complexity should be O(1).

  • Answered by AI
Round 3 - Face to Face 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Easy

This was a technical round with questions on DSA.

  • Q1. 

    Reverse Words in a String: Problem Statement

    You are given a string of length N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o...

  • Ans. 

    Reverse words in a string while handling leading, trailing, and multiple spaces.

    • Split the input string by spaces to get individual words

    • Reverse the order of the words

    • Join the reversed words with a single space in between

  • Answered by AI
  • Q2. 

    Circular Linked List Detection

    You are provided with the head of a linked list containing integers. Your task is to determine if the linked list is circular.

    Note:
    • A linked list is considered circula...
  • Ans. 

    Detect if a given linked list is circular by checking if it forms a closed loop.

    • Traverse the linked list using two pointers, one moving at double the speed of the other.

    • If the two pointers meet at any point, the linked list is circular.

    • If the faster pointer reaches the end of the list (NULL), the linked list is not circular.

  • Answered by AI
Round 4 - HR 

Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAMAQ Software interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 5 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-

I applied via Campus Placement

Round 1 - Aptitude Test 

The basic question is related to profit percentage, time and distance

Round 2 - system design 

(1 Question)

  • Q1. Is the database schema of any type?
  • Ans. 

    Yes, the database schema can be of various types such as relational, hierarchical, network, object-oriented, etc.

    • Relational database schema is the most common type, using tables to store data with relationships between them.

    • Hierarchical database schema organizes data in a tree-like structure.

    • Network database schema allows multiple relationships between records.

    • Object-oriented database schema stores data as objects with...

  • Answered by AI
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Coding Test 

BASIC DSA LIKE ARRAY AND STRING

Round 2 - Technical 

(2 Questions)

  • Q1. System Design for Electric Charger app ?
  • Ans. 

    System design for an electric charger app involves creating a user-friendly interface, integrating with payment systems, and ensuring efficient charging station management.

    • Design a user-friendly interface for users to locate and reserve charging stations

    • Integrate with payment systems for seamless transactions

    • Implement efficient charging station management to monitor availability and maintenance

    • Consider scalability for ...

  • Answered by AI
  • Q2. Design digram for that ?
  • Ans. 

    Design diagram for a software developer role.

    • Use UML diagrams to show class relationships and interactions

    • Include components like classes, interfaces, relationships, and methods

    • Consider using tools like Lucidchart or draw.io for creating the diagram

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Don't go for this company . Package is very bad.

Skills evaluated in this interview

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Company Website and was interviewed in Aug 2024. There were 2 interview rounds.

Round 1 - Aptitude Test 

Very basic aptitude questions along with few coding questions

Round 2 - Technical 

(2 Questions)

  • Q1. A problem statement was given and we had to provide an optimal approach to design and handle that problem
  • Q2. Oops concepts, SQL queries
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - HR 

(2 Questions)

  • Q1. What is the work experience
  • Ans. 

    Work experience refers to the practical knowledge and skills gained from previous employment.

    • Work experience includes previous jobs, internships, and projects related to the field.

    • It showcases the candidate's ability to apply theoretical knowledge in real-world scenarios.

    • Employers look for relevant work experience to assess the candidate's capabilities and fit for the role.

  • Answered by AI
  • Q2. What is the data skill set
  • Ans. 

    Data skill set refers to the abilities and knowledge related to handling, analyzing, and interpreting data.

    • Proficiency in data analysis tools such as SQL, Python, R, or Excel

    • Understanding of data structures and algorithms

    • Experience with data visualization techniques like Tableau or Power BI

    • Knowledge of statistical analysis and machine learning concepts

    • Ability to clean and preprocess data for analysis

  • Answered by AI
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via Campus Placement and was interviewed in Aug 2023. There were 4 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Aptitude Test 

There was aptitude test in the first round, They were mainly quantitative, English questions..
And we had coding questions (3 questions) and they were medium questions..

Round 3 - System Design 

(2 Questions)

  • Q1. We had given a problem statement, and we had to write down the solution (technical solution) and it was pen and paper based..
  • Q2. Emergency traffic signal system, in case of ambulance
Round 4 - HR 

(1 Question)

  • Q1. They asked mainly based on the system design which we had written and about our projects etc...
Interview experience
3
Average
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Aptitude Test 

It was basic test. online.

Round 3 - Coding Test 

2 questions on arrays. online.

Round 4 - Group Discussion 

The general topic. Be point to point

Round 5 - Technical 

(1 Question)

  • Q1. SQL and Python questions. online. screen sharing

I applied via Campus Placement and was interviewed before Jun 2021. There were 3 interview rounds.

Round 1 - Aptitude Test 

Not hard

Round 2 - Technical 

(2 Questions)

  • Q1. On java sql and related
  • Q2. Interview questions on java , SQL and basic queries on joins and coding questions on string manipulation and linked list . Also they ask about trees and graphs.
Round 3 - HR 

(1 Question)

  • Q1. Common HR questions and related

Interview Preparation Tips

Topics to prepare for DataMetica Software Developer interview:
  • Java
  • SQL
Interview preparation tips for other job seekers - Try to have other offers also so that you can negotiate
Interview experience
1
Bad
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
No response

I applied via Approached by Company and was interviewed in Feb 2024. There were 4 interview rounds.

Round 1 - Coding Test 

DSA coding 2-3 question

Round 2 - Group Discussion 

Java, DSA coding, java 8 coding, multithreading

Round 3 - Group Discussion 

Java8, spring-boot, DSA coding

Round 4 - Technical 

(1 Question)

  • Q1. DSA coding, java 8 coding, spring boot, mysql

Interview Preparation Tips

Interview preparation tips for other job seekers - WORST company. They will waste your time in 4-5 technical rounds and at the time of offer they will ghost you. playing with someone's career is not cool. Be aware of companies like this.

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