Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A mobile game company stores player profiles and game state in Azure Cosmos DB. Each document contains playerId, level, score, inventory (an array of items), and lastLogin. The application requires fast point reads by playerId, queries to find all players within a specific score range, and global distribution with multi-region writes for low latency worldwide. They also want to use a familiar SQL-like query language. Which Azure Cosmos DB API should they choose?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
Core (SQL) API
Correct. The Core (SQL) API provides a SQL-like query language, supports point reads and range queries, and enables multi-region writes for global distribution.
B
Distractor review
MongoDB API
The MongoDB API uses MongoDB's query language (not SQL) and supports multi-region writes, but the team prefers a SQL-like syntax, so it is not the best fit.
C
Distractor review
Cassandra API
The Cassandra API uses CQL, which resembles SQL, but the primary querying pattern is by partition key. Range queries on non-partition key fields like score may require careful modelling and are less efficient than the Core (SQL) API for arbitrary queries.
D
Distractor review
Gremlin API
The Gremlin API is designed for graph data and graph traversals, not for document-based queries with SQL-like syntax. It would not be appropriate for player profiles and scores.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Related practice questions
Related DP-900 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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FAQ
Questions learners often ask
What does this DP-900 question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Core (SQL) API — The Core (SQL) API is the native Cosmos DB API that supports SQL-like queries, including point reads and range queries on any indexed fields. It also supports multi-region writes for global distribution. The MongoDB API provides a MongoDB-compatible interface but does not natively use SQL syntax. The Cassandra API uses CQL (Cassandra Query Language) which is similar to SQL but not identical. The Gremlin API is for graph databases. Therefore, the Core (SQL) API best meets all requirements.
What should I do if I get this DP-900 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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