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I applied via Naukri.com and was interviewed in May 2024. There was 1 interview round.
React hooks are functions that let you use state and other React features in functional components.
Allow functional components to have state and lifecycle methods
Replace class components with simpler functional components
Examples: useState, useEffect, useContext
Redux is a predictable state container for JavaScript apps, used to manage application state in a centralized store.
Redux helps manage the state of an application in a predictable way
It allows for a single source of truth for the state of the application
Redux is commonly used with React to manage the state of components
Actions are dispatched to update the state in Redux store
Reducers specify how the state changes in re
Yes, I have experience with file upload tasks. Files are saved in DB by storing the file path and retrieval is done by fetching the file path from the DB.
Used multer middleware in Node.js to handle file uploads
Saved file path in MongoDB using Mongoose schema
Retrieved file by querying the database for the file path
Implemented file upload functionality in a project using React for the front end
CRUD operations in MongoDB include create, read, update, and delete operations on documents in a collection.
Create: db.collection.insertOne()
Read: db.collection.find()
Update: db.collection.updateOne()
Delete: db.collection.deleteOne()
Aggregation is the process of combining data from multiple sources to provide a summary or overview.
Aggregation in databases involves grouping and summarizing data to provide insights.
In MongoDB, aggregation pipelines are used to process data and return computed results.
Examples of aggregation functions include sum, average, count, and group by.
They are used in MongoDB aggregation pipeline to perform various operations like joining, filtering, projecting, etc.
Used in MongoDB aggregation pipeline for data manipulation
Perform operations like joining, filtering, projecting, etc.
Help in combining data from multiple collections
Use $lookup to perform a left outer join between two collections
Developed a real-time chat application using Node.js with Socket.io for instant messaging functionality.
Implemented server-side logic using Node.js to handle incoming messages and broadcast them to all connected clients
Utilized Socket.io library to establish WebSocket connections for real-time communication
Integrated with MongoDB to store chat messages and user information
Implemented authentication and authorization me
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I applied via Campus Placement and was interviewed before Jul 2021. There were 4 interview rounds.
Aptitude test on CS subjects like C programming, DBMS, CN, and OS.
There were 2 input-output based questions of easy to moderate level
Every candidate was given an individual topic and was asked to speak on it
I applied via Company Website and was interviewed before Dec 2020. There were 4 interview rounds.
I applied via Referral and was interviewed before Jan 2021. There was 1 interview round.
I applied via Campus Placement and was interviewed before Feb 2021. There were 3 interview rounds.
Aptitude round consists Logical reasoning, General Aptitude, Grammar related questions etc. All are moderate level questions.
OOPs is a programming paradigm that uses objects to represent real-world entities. Java is an OOPs language.
OOPs stands for Object-Oriented Programming System
Java is a class-based OOPs language
Encapsulation, Inheritance, Polymorphism, and Abstraction are the four pillars of OOPs
Objects have state and behavior
Java supports interfaces, which allow for multiple inheritance
Example: A car can be represented as an object wit...
Java solves machine dependency by using bytecode and virtual machine.
Java code is compiled into bytecode which is platform-independent
The bytecode is executed by the Java Virtual Machine (JVM) which is platform-specific
JVM translates bytecode into machine code for the specific platform
This allows Java code to run on any platform with a JVM installed
Example: A Java program compiled on Windows can run on Linux or Mac as
I applied via Company Website and was interviewed before Jul 2021. There were 3 interview rounds.
Aptitude, reasoning, English, cloud sections
2 questions in which , one has to complete within an 50 minutes
I applied via Campus Placement and was interviewed before May 2021. There were 2 interview rounds.
Numerical ability and logical reasoning followed by some coding mcqs
Printing 1 to 100 without for loop
Use recursion to print numbers from 1 to 99
Print 100 outside the recursion
Use a base case to stop recursion at 100
I applied via Campus Placement and was interviewed before Jun 2021. There were 2 interview rounds.
Simple aptitude test
I applied via Company Website and was interviewed before Jul 2021. There were 2 interview rounds.
Attended the codevita competition in final year of college.
I applied via Campus Placement and was interviewed before Aug 2021. There were 2 interview rounds.
It was a basic aptitude test.
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Interview experience
Software Developer Trainee
3
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Wipro
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