MongoDB C100DEV Python Practice Tests + Exam Q [2026]

About this course

The MongoDB Associate Developer (Python) exam — C100DEV — tests whether you can build real applications with PyMongo, not just recite documentation. If you're preparing for it, you need practice that mirrors what the actual test throws at you. This course has 6 timed practice exams with 360 questions covering every C100DEV domain. Each answer option — correct and incorrect — comes with a written explanation so you understand the reasoning behind each choice. What's covered: CRUD Operations — insert, find, update, delete with PyMongo. Write concerns, read preferences, bulk operations, and cursor behavior Indexes & Performance — Single field, compound, multikey, text, geospatial indexes. Reading explain() plans, index intersection, and Performance Advisor Aggregation Framework — Pipeline stages: $match, $group, $project, $lookup, $unwind, $facet, $merge. Expression operators and optimization Data Modeling — Embedding vs referencing, polymorphic patterns, bucket patterns, schema validation, and anti-patterns to avoid MongoDB Fundamentals — BSON types, document structure, collections, databases, and the MongoDB architecture PyMongo Driver — Connection strings, MongoClient options, error handling, sessions, transactions, and change streams Exam setup: 90 minutes per exam, 65% to pass Randomized question order on every attempt Covers all C100DEV domains at exam-realistic weighting Updated for 2026 — aligned with MongoDB 7.x and 8.x Take Exam 1, check your domain scores, revisit your weak spots, and repeat. By the time you're consistently hitting 80%+ across all six tests, you'l