Do you have practical experience working with the MongoDB database?

Yes, I have practical experience working with MongoDB. I used it for storing and processing unstructured data in projects where flexible schema and scalability were required.

The main tasks I performed:

• Designing document schemas considering application requirements.
• Performing CRUD operations through MongoDB drivers.
• Optimizing queries using indexes.
• Using aggregation functions for data processing.
• Setting up replication and sharding to ensure fault tolerance and scalability.

An example of a simple query in Python using PyMongo:

from pymongo import MongoClient

client = MongoClient('mongodb://localhost:27017/')
db = client['mydatabase']
collection = db['users']

# Insert a document
collection.insert_one({'name': 'Ivan', 'age': 30})

# Find documents
for user in collection.find({'age': {'$gt': 25}}):
    print(user)