CASSANDRA Professional Development 2 — Questions and Answers
Question 1: Which certification is offered by DataStax specifically for Apache Cassandra professionals?
- AWS Certified Database Specialty
- DataStax Certified Apache Cassandra Administrator (Correct answer)
- Oracle Database Professional
- MongoDB Certified DBA
Correct answer: DataStax Certified Apache Cassandra Administrator
DataStax offers the DataStax Certified Apache Cassandra Administrator (DCAA) credential for Cassandra professionals.
Question 2: When preparing for a Cassandra administrator role, which skill is most critical to demonstrate in interviews?
- Proficiency in SQL joins and subqueries
- Understanding of data modeling around query patterns (Correct answer)
- Experience with RDBMS normalization
- Knowledge of row-level locking mechanisms
Correct answer: Understanding of data modeling around query patterns
Cassandra data modeling is query-driven, so designing tables around anticipated queries is a foundational skill interviewers test.
Question 3: Which open-source tool is most commonly recommended for learning Cassandra locally before working in production?
- Docker with the official cassandra image (Correct answer)
- VMware vSphere cluster
- AWS RDS Multi-AZ
- Oracle VM VirtualBox with 32 nodes
Correct answer: Docker with the official cassandra image
Running the official Cassandra Docker image is the fastest way to spin up a local instance for learning and development.
Question 4: What community resource provides official Apache Cassandra mailing lists, documentation, and issue tracking?
- cassandra.io forums
- The Apache Software Foundation project site (Correct answer)
- DataStax Academy only
- MongoDB University crossover program
Correct answer: The Apache Software Foundation project site
Apache Cassandra is hosted under the Apache Software Foundation, which provides mailing lists, JIRA, and official docs.
Question 5: A developer wants to transition from a relational DBA role to a Cassandra DBA. What is the most important mindset shift required?
- Replacing transactions with eventual consistency and query-first design (Correct answer)
- Learning to write more complex stored procedures
- Prioritizing referential integrity constraints
- Adopting row-level locking for concurrency control
Correct answer: Replacing transactions with eventual consistency and query-first design
The biggest shift is embracing eventual consistency and designing schemas around queries rather than data relationships.
Question 6: Which conference is most closely associated with the Apache Cassandra community for professional networking?
- OracleWorld
- Cassandra Summit / DataStax Accelerate (Correct answer)
- MongoDB .local
- AWS re:Invent (database track only)
Correct answer: Cassandra Summit / DataStax Accelerate
Cassandra Summit (rebranded as DataStax Accelerate) is the primary conference dedicated to the Cassandra ecosystem.
Question 7: What is the best approach to staying current with Apache Cassandra version changes and new features?
- Monitoring only vendor blog posts
- Following the ASF Cassandra mailing lists and reviewing release notes on the project JIRA (Correct answer)
- Waiting for textbook updates
- Relying solely on Stack Overflow answers
Correct answer: Following the ASF Cassandra mailing lists and reviewing release notes on the project JIRA
The ASF mailing lists and JIRA release notes are the authoritative source for new features, bug fixes, and deprecations.
CASSANDRA Professional Development 2
Which certification is offered by DataStax specifically for Apache Cassandra professionals?