Certification Practice
Free practice exams for data engineering certifications. Take quizzes, see your score, find your weak spots. Unlimited attempts for registered users.
Practice questions written independently. Not affiliated with any cert vendor.
Apache Airflow Fundamentals
Practice exam for the Astronomer Apache Airflow Fundamentals certification. Hand-curated questions covering DAG concepts, operators, scheduling, executors, and production best practices. Free for registered users.
AWS Certified AI Practitioner (AIF-C01)
Practice exam for AWS Certified AI Practitioner (AIF-C01). Fundamentals of AI and ML, fundamentals of generative AI, applications of foundation models, responsible AI, and security, compliance and governance for AI solutions. Written against exam guide version 1.1, including agentic AI, Amazon Bedrock AgentCore, Kiro and Amazon Quick. Free for registered users.
AWS Certified Cloud Practitioner (CLF-C02)
Practice exam for AWS Certified Cloud Practitioner (CLF-C02). Cloud concepts and the Well-Architected Framework, the shared responsibility model, security, identity and compliance, global infrastructure, compute, networking, storage, databases, analytics and AI services, and billing, pricing and AWS Support plans. Written against the current CLF-C02 exam guide, including the Business Support+, Enterprise Support and Unified Operations plans. Free for registered users.
AWS Certified Data Engineer - Associate (DEA-C01)
Practice exam for AWS Certified Data Engineer - Associate (DEA-C01). Data ingestion and transformation, pipeline orchestration, data store selection and modelling, cataloging and data lifecycle, operations and analytics, monitoring and data quality, and security and governance. Covers Amazon Kinesis, Amazon MSK, AWS Glue, Amazon EMR, Amazon Redshift, Amazon Athena, AWS Lake Formation, Amazon DynamoDB and Amazon S3. Written against exam guide version 1.1. Free for registered users.
Microsoft Azure DevOps Solutions (AZ-400)
Practice exam for Microsoft AZ-400: Designing and Implementing Microsoft DevOps Solutions, the exam behind the DevOps Engineer Expert certification. Processes and traceability, source control and branching, package management, testing and quality gates, pipelines and agents, deployment strategies, infrastructure as code, security and compliance, and instrumentation. Covers both Azure DevOps and GitHub, as the exam does. Free for registered users.
Claude Agentic Architecture
Independent practice exam on architecting agentic systems with Claude. Agent loops and orchestration, tool design and MCP, prompt engineering and structured output, Claude Code configuration, and context management and reliability. Written and maintained here — not affiliated with Anthropic, and not a credential. Free for registered users.
Data Engineer Screening
Independent timed skill assessment shaped like a real data engineering screen: SQL under time pressure, data modeling and warehousing, the big data ecosystem including its legacy corners, Python for pipelines, and ETL orchestration. 60 questions in 60 minutes. Written and maintained here — not a credential. Free for registered users.
dbt Analytics Engineer
Practice exam for the dbt Analytics Engineering certification. Hand-written questions covering all 8 official domains. Free for registered users.
GitHub AI Coding Agent (GH-600)
Practice exam for the GitHub Certified: Agentic AI Developer (GH-600) certification. Agent architecture, tool use & MCP, memory and execution, evaluation & tuning, multi-agent coordination, guardrails & accountability. Free for registered users.
Confluent Kafka Developer Associate
Practice exam for the Confluent Apache Kafka Developer Associate certification. Producers, consumers, brokers, Kafka Connect, Kafka Streams, Schema Registry, security, and production operations. Free for registered users.
MongoDB Associate Developer
Practice exam for the MongoDB Associate Developer certification. Document model, CRUD, aggregation pipelines, indexing, replication & sharding, PyMongo, change streams, and Atlas. Free for registered users.
Python for Data Engineering
Independent skill assessment covering the Python a data engineer actually writes: pandas and NumPy, file and serialization formats, HTTP APIs with retries and pagination, errors and logging, testing and type hints, performance and memory, and dates across timezones. Written and maintained here — not a credential. Free for registered users.
Python PCEP — Certified Entry-Level Programmer (30-02)
Practice exam for the PCEP-30-02 Certified Entry-Level Python Programmer certification. Fundamentals, control flow, data collections, functions and exceptions. Free for registered users.
Securities Industry Essentials (SIE)
Practice exam for the FINRA Securities Industry Essentials (SIE) exam. Capital markets, products and their risks, trading and customer accounts, prohibited activities, and the regulatory framework. Free for registered users.
SQL for Data Engineers
Independent skill assessment covering SQL as data engineering screens test it: query fundamentals and NULL semantics, window functions and CTEs, indexing and query performance, aggregation, modeling and DDL, transactions and isolation, and where PostgreSQL, MySQL, BigQuery and Snowflake diverge. Written and maintained here — not a credential. Free for registered users.