Deepika Agrawal

Web Developer 💻 | HTML • CSS • JS | Spring Boot ⚙️ | Java & Python ☕🐍 | Building scalable web apps 🚀

[Deepika Agrawal @DeepikaAgg_15]

Day 25/90 – Backend Journey 🚀
Today I learned key MongoDB concepts like projections to fetch required fields efficiently, understanding different data types for flexible schemas, & using the $exists operator to check whether a field is present in a document.
#BackendDevelopment

[Deepika Agrawal @DeepikaAgg_15]

Day 24/90 – Backend Journey
Today I learned the difference between Ordered and Unordered insertion in MongoDB and basic perform basic operations on database.
✅ Day 24 completed
#BackendDevelopment
#LearningJourney

[Deepika Agrawal @DeepikaAgg_15]

Day 23/90 – Backend Journey 🚀
Today, I learned why unstructured / NoSQL db like MongoDB are required and where they fit best in modern backend systems.
📌 Correction: My previous post mentioned Day 22 due to a small typo—today is Day 23.
#BackendDevelopment #90DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

Day 21/90 – Backend Journey 🚀
Today I worked on databases & explored an interesting question:If data is in JSON, why does MongoDB use BSON?
Learned that BSON is optimized for:
⚡Efficient storage of complex data types
⚡working on more datatypes
@surajtwt_
#BackendDevelopment

[Deepika Agrawal @DeepikaAgg_15]

Day 21/90 – Backend Journey 🚀
Created a mini project implementing cookies,sessions for state management, middleware for request handling, and REST APIs for data flow. Hands-on learning that strengthened my backend fundamentals @surajtwt_
#Backend #APIs #Middleware #90DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

Day 20/90 – Backend Journey 🚀
Today I learned about cookies—what they are, how they work, how to create, send, use them to manage user sessions & state in backend applications. Strengthening the fundamentals step by step.@surajtwt_
#BackendDevelopment #Cookies #WebDevelopment

[Deepika Agrawal @DeepikaAgg_15]

Day 19/90 – Backend Journey 🚀
Explored middleware in backend development—its types, purpose, and how to build custom middleware for request handling, logging, and authentication.@surajtwt_
#BackendDevelopment #NodeJS #Middleware #100DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

@helderbuilds @surajtwt_ Currently I am focused on learning path through some projects.

[Deepika Agrawal @DeepikaAgg_15]

Day 17/90 – Backend Journey 🚀
Today I learned about Streams in Node.js, including file handling with &without streams.
Explored createReadStream() ,how it improves performance by reading data in chunks instead of loading entire files into memory. @surajtwt_
#BackendDevelopment

[Deepika Agrawal @DeepikaAgg_15]

Day 18/90 – Backend Journey 🚀
Today I learned about custom streams—how to transform data, apply pipelines, and transpose data efficiently using stream operations.
Building cleaner, more functional backend logic step by step. 💻⚡@surajtwt_
#BackendDevelopment #90DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

Day 16/90 – Backend Journey 🚀
Today, I explored event-driven concepts in the backend, learning how events are emitted, handled asynchronously, and used to build scalable and decoupled systems.
#BackendDevelopment #EventDriven #NodeJS #90DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

Day 15/90 – Backend Journey 🚀

📁 Learned Path module in Node.js
🌊 Explored Streams in Node.js
⚙️ Understood how streams help with memory optimization and scalability
Building strong backend fundamentals.💻✨@surajtwt_
#BackendDevelopment #NodeJS #90DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

Day 14/90 – Backend Journey 🚀

✅File handling in Node.js using the fs module
✅Module function Execution
✅Explored Node.js internals: event loop, thread pool etc.
Getting deeper into how Node.js works behind the scenes. 💻@surajtwt_
#BackendDevelopment #NodeJS #90DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

Day 13/90 – Backend Journey 🚀
Today, I learned about JSON & BSON in MongoDB, understanding how data is stored & transferred. I also started working with Mongoose, exploring schemas, & how it simplify data &interaction with MongoDB in Node.js applications.
#BackendDevelopment

[Deepika Agrawal @DeepikaAgg_15]

Day 12/90 – Backend Journey 🚀
Today, I learned MongoDB fundamentals, including collections, documents, CRUD operations, and how NoSQL databases are used in modern backend applications.
#BackendDevelopment #MongoDB #NoSQL #90DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

Day 11/90 – Backend Journey 🚀
Today, I built a small backend project applying everything I’ve learned so far—API creation, database integration, and core backend concepts. This hands-on practice helped me better understand real-world backend workflows.
#BackendDevelopment

[Deepika Agrawal @DeepikaAgg_15]

@AnshitvaM Sure🙂

[Deepika Agrawal @DeepikaAgg_15]

Day 10/90 – Backend Journey 🚀
Today, I worked with faker data in the backend, using it to simulate real-world datasets and perform various SQL operations and queries for practice and testing.
#BackendDevelopment #SQL #Database #90DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

Day 9/90 – Backend Journey 🚀
Today, I learned SQL fundamentals and commands (queries, joins, and data manipulation) and worked with Node.js to understand how it interacts with databases on the backend.
#BackendDevelopment #SQL #NodeJS #90DaysOfCode

[Deepika Agrawal @DeepikaAgg_15]

Day 8/90 – Backend Journey 🚀
Today, I learned about database connectivity, including how to connect & interact with a database from backend. I also built a small project using RESTful APIs, implementing basic CRUD operations & integrating the database with the API layer.💻