Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A mobile gaming company stores player data in Azure Cosmos DB using the Core (SQL) API. Each document contains fields: playerId, nickname, score, level, and an inventory array of item objects (each with name and type). The company wants to query all players whose score is above 5000 and who have a specific item (e.g., a sword) in their inventory. Which query clause should they use?
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
Distractor review
A) WHERE c.score > 5000 AND c.inventory.some(item => item.name == 'sword')
This syntax is from MongoDB, not Cosmos DB SQL API. Cosmos DB uses ARRAY_CONTAINS or JOIN with WHERE clauses.
B
Best answer
B) WHERE c.score > 5000 AND ARRAY_CONTAINS(c.inventory, {name: 'sword'}, true)
ARRAY_CONTAINS checks if the array contains an object that matches the specified properties. The third parameter 'true' enables partial matching, so it finds items where name equals 'sword' regardless of other fields.
C
Distractor review
C) WHERE c.score > 5000 AND c.inventory.name == 'sword'
This is invalid because inventory is an array, and accessing .name on an array is not allowed. This would cause a query error.
D
Distractor review
D) WHERE c.score > 5000 AND 'sword' IN c.inventory
The IN operator only works with scalar values or subqueries, not with arrays of objects. It would not match the object structure.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
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?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: B) WHERE c.score > 5000 AND ARRAY_CONTAINS(c.inventory, {name: 'sword'}, true) — Cosmos DB SQL API supports the ARRAY_CONTAINS function to check if an array contains a specific object. To match an item by name, you must use ARRAY_CONTAINS with the full object or project a subset. The correct syntax is ARRAY_CONTAINS(c.inventory, {name: 'sword'}, true) where the third parameter enables partial matching of properties.
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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