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The request-response cycle in node.js involves a client sending a request to a server, which processes the request and sends back a response.
Client sends a request to the server using HTTP methods like GET, POST, PUT, DELETE.
Server receives the request, processes it, and generates a response.
The response is sent back to the client, typically in the form of HTML, JSON, or other data formats.
Node.js uses event-drive...
Different authentication methods include OAuth, JWT, Basic Auth, and OAuth2.
OAuth: Allows third-party applications to access resources without sharing credentials.
JWT (JSON Web Tokens): Securely transmit information between parties as a JSON object.
Basic Auth: Sends user credentials in the header of each request.
OAuth2: Authorization framework that enables a third-party application to obtain limited access to an H...
I believe no-code tools like XANO are great for rapid prototyping and simplifying development processes.
No-code tools like XANO allow for faster development by eliminating the need for manual coding
They are great for prototyping and testing ideas quickly
XANO specifically offers a visual interface for building backend logic without writing code
I have used XANO in a few projects and found it to be user-friendly and ...
JWT key parameters include header, payload, signature, and expiration time.
Header: Contains metadata about the token such as the type and hashing algorithm.
Payload: Contains claims or information about the user.
Signature: Used to verify that the sender of the JWT is who it says it is and to ensure that the message wasn't changed along the way.
Expiration Time: Specifies the time after which the JWT expires and shou...
Promises are objects representing the eventual completion or failure of an asynchronous operation, while callbacks are functions passed as arguments to be executed after a task is completed.
Promises allow chaining multiple asynchronous operations, while callbacks can lead to callback hell.
Promises have built-in error handling through .catch(), while callbacks rely on error-first callbacks.
Promises are easier to re...
My approach for Heavy Data Handling involves optimizing database queries, using indexing, caching, and implementing efficient algorithms.
Optimizing database queries by using proper indexing and avoiding unnecessary joins
Implementing caching mechanisms to reduce the load on the database
Using efficient algorithms for data processing and manipulation
Batch processing large datasets to minimize resource usage
Implementi...
Key considerations include data modeling, indexing, sharding, and replication.
Consider the data model carefully to ensure it fits the application's needs.
Use indexing to improve query performance.
Plan for sharding to distribute data across multiple servers for scalability.
Implement replication for high availability and fault tolerance.
Mongo query to increase age by 20% for documents with age field
Use $exists operator to filter documents with age field
Use $mul operator to increase age by 20%
Example: db.users.updateMany({ age: { $exists: true } }, { $mul: { age: 1.2 } })
Over-indexing in MongoDB can negatively impact performance by increasing memory usage and slowing down query execution.
Over-indexing can lead to increased memory usage as each index consumes memory.
Having too many indexes can slow down write operations as each index needs to be updated when a document is inserted, updated, or deleted.
To prevent over-indexing, carefully analyze query patterns and create indexes onl...
Key factors include data modeling, normalization, indexing, scalability, and performance.
Consider data modeling to ensure efficient storage and retrieval of data.
Normalize the database to reduce redundancy and improve data integrity.
Use indexing to speed up data retrieval operations.
Design for scalability to accommodate future growth and changes.
Optimize for performance by considering query optimization and data c...
I applied via Referral and was interviewed in Oct 2024. There were 3 interview rounds.
I am a backend developer with expertise in Java, Spring Boot, and MySQL. I am looking for a competitive salary in a location with a strong tech community.
Experienced in Java, Spring Boot, and MySQL
Seeking competitive salary
Prefer location with strong tech community
Key considerations include data modeling, indexing, sharding, and replication.
Consider the data model carefully to ensure it fits the application's needs.
Use indexing to improve query performance.
Plan for sharding to distribute data across multiple servers for scalability.
Implement replication for high availability and fault tolerance.
Over-indexing in MongoDB can negatively impact performance by increasing memory usage and slowing down query execution.
Over-indexing can lead to increased memory usage as each index consumes memory.
Having too many indexes can slow down write operations as each index needs to be updated when a document is inserted, updated, or deleted.
To prevent over-indexing, carefully analyze query patterns and create indexes only for...
Mongo query to increase age by 20% for documents with age field
Use $exists operator to filter documents with age field
Use $mul operator to increase age by 20%
Example: db.users.updateMany({ age: { $exists: true } }, { $mul: { age: 1.2 } })
Different authentication methods include OAuth, JWT, Basic Auth, and OAuth2.
OAuth: Allows third-party applications to access resources without sharing credentials.
JWT (JSON Web Tokens): Securely transmit information between parties as a JSON object.
Basic Auth: Sends user credentials in the header of each request.
OAuth2: Authorization framework that enables a third-party application to obtain limited access to an HTTP s...
JWT key parameters include header, payload, signature, and expiration time.
Header: Contains metadata about the token such as the type and hashing algorithm.
Payload: Contains claims or information about the user.
Signature: Used to verify that the sender of the JWT is who it says it is and to ensure that the message wasn't changed along the way.
Expiration Time: Specifies the time after which the JWT expires and should no...
My approach for Heavy Data Handling involves optimizing database queries, using indexing, caching, and implementing efficient algorithms.
Optimizing database queries by using proper indexing and avoiding unnecessary joins
Implementing caching mechanisms to reduce the load on the database
Using efficient algorithms for data processing and manipulation
Batch processing large datasets to minimize resource usage
Implementing da...
Promises are objects representing the eventual completion or failure of an asynchronous operation, while callbacks are functions passed as arguments to be executed after a task is completed.
Promises allow chaining multiple asynchronous operations, while callbacks can lead to callback hell.
Promises have built-in error handling through .catch(), while callbacks rely on error-first callbacks.
Promises are easier to read an...
The request-response cycle in node.js involves a client sending a request to a server, which processes the request and sends back a response.
Client sends a request to the server using HTTP methods like GET, POST, PUT, DELETE.
Server receives the request, processes it, and generates a response.
The response is sent back to the client, typically in the form of HTML, JSON, or other data formats.
Node.js uses event-driven, no...
Use the KEYS command in Redis to retrieve all keys containing a specific substring.
Use the KEYS command followed by the pattern '*xyz*' to retrieve all keys containing the substring 'xyz'.
Be cautious when using the KEYS command as it can be resource-intensive on large datasets.
Consider using SCAN command for better performance when dealing with large datasets.
I believe no-code tools like XANO are great for rapid prototyping and simplifying development processes.
No-code tools like XANO allow for faster development by eliminating the need for manual coding
They are great for prototyping and testing ideas quickly
XANO specifically offers a visual interface for building backend logic without writing code
I have used XANO in a few projects and found it to be user-friendly and effic...
I am a backend developer with 5 years of experience in building scalable and efficient web applications.
5 years of experience in backend development
Proficient in languages like Java, Python, and Node.js
Strong understanding of database management systems such as MySQL and MongoDB
Experience in building RESTful APIs and microservices
Familiar with cloud technologies like AWS and Azure
I have worked on developing a real-time chat application and a data visualization tool for analyzing user behavior.
Developed a real-time chat application using Node.js, Socket.io, and MongoDB.
Created a data visualization tool using D3.js to analyze user behavior on a website.
Collaborated with front-end developers to integrate backend functionality with the user interface.
Implemented RESTful APIs for communication betwe...
Key factors include data modeling, normalization, indexing, scalability, and performance.
Consider data modeling to ensure efficient storage and retrieval of data.
Normalize the database to reduce redundancy and improve data integrity.
Use indexing to speed up data retrieval operations.
Design for scalability to accommodate future growth and changes.
Optimize for performance by considering query optimization and data cachin...
Yes, I have experience with Xano, a no-code backend development platform that simplifies API creation and database management.
Utilized Xano to build a RESTful API for a mobile application, streamlining data retrieval and management.
Leveraged Xano's database features to create and manage complex data relationships without writing SQL queries.
Integrated third-party services like Stripe for payment processing using Xano's...
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I applied via Naukri.com and was interviewed in Sep 2019. There was 1 interview round.
I am a recent graduate with a degree in Computer Science and experience in web development.
Recent graduate with a degree in Computer Science
Experience in web development
Strong problem-solving skills
Proficient in programming languages such as Java, JavaScript, and HTML/CSS
My hobbies include reading, hiking, and playing the guitar.
Reading: I enjoy reading fiction and non-fiction books in my free time.
Hiking: I love exploring nature trails and challenging myself with new hikes.
Playing the guitar: I have been playing the guitar for several years and enjoy learning new songs.
Our company is a leading tech startup specializing in AI-driven solutions for businesses.
Specializes in AI-driven solutions for businesses
Considered a leading tech startup in the industry
Known for innovative and cutting-edge technology
Has a strong focus on research and development
Provides services to a wide range of industries
I want to join your company because of its innovative projects, strong company culture, and opportunities for growth.
Innovative projects that align with my interests and skills
Strong company culture that values collaboration and employee development
Opportunities for growth and advancement within the company
I completed various training programs and projects during my college years, gaining hands-on experience in different areas.
Completed a training program in data analysis using Python and R
Developed a mobile application for a class project using Java and Android Studio
Participated in a research project on renewable energy sources
Completed an internship at a local software company, working on web development projects
I appeared for an interview before May 2016.
I appeared for an interview in Jul 2017.
I appeared for an interview in Jul 2017.
Yes, I am a fresher with no past working experience.
I am a recent graduate looking to gain experience in the field.
I have completed internships or projects during my studies.
I am eager to learn and grow in a professional environment.
I was responsible for conducting market research, creating social media content, and assisting with event planning.
Conducted market research to identify trends and opportunities
Created engaging social media content to increase brand awareness
Assisted in planning and executing events to promote company products/services
I am a recent graduate with a degree in Computer Science and a passion for coding and problem-solving.
Recent graduate with a degree in Computer Science
Passionate about coding and problem-solving
Strong communication and teamwork skills
Experience with programming languages such as Java, Python, and C++
I applied via Approached by Company and was interviewed in Jul 2017. There were 5 interview rounds.
I applied via Other and was interviewed in Jan 2018. There were 5 interview rounds.
I applied via Other and was interviewed in Jan 2018. There were 5 interview rounds.
Certifications are not mandatory for software developers, but can add value to their resume.
Certifications in programming languages like Java, Python, C++
Certifications in software development methodologies like Agile, Scrum
Certifications in cloud computing platforms like AWS, Azure
Certifications in security like CISSP, CEH
Certifications in project management like PMP
Certifications in mobile app development like Androi...
Some of the top questions asked at the Unico Connect Backend Developer interview -
based on 1 interview experience
Difficulty level
Duration
Software Engineer
19
salaries
| ₹4.5 L/yr - ₹18 L/yr |
Senior Software Engineer
10
salaries
| ₹13.8 L/yr - ₹21 L/yr |
Technical Lead
8
salaries
| ₹37 L/yr - ₹42 L/yr |
Software Developer
7
salaries
| ₹3 L/yr - ₹7.8 L/yr |
Senior Software Developer
6
salaries
| ₹14 L/yr - ₹20 L/yr |
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