The answer is to use a separate lease container with partition key /id. This configuration is correct because the change feed processor relies on the lease container to manage distributed ownership of partitions across multiple application instances; each instance acquires leases on specific partitions, and the /id partition key ensures that each lease document is uniquely identified and can be assigned to a single instance, guaranteeing that no two instances process the same partition simultaneously. On the AZ-204 exam, this tests your understanding of the change feed processor’s internal mechanics—a common trap is confusing the monitored container’s partition key with the lease container’s, but remember that the lease container’s partition key must be /id to enable the processor’s built-in lease distribution logic. A helpful memory tip: think of the lease container as a “parking lot” where each partition gets its own spot (unique /id), and each instance takes a different spot to avoid collisions.
AZ-204 Practice Question: Connect to and consume Azure services and third-party services
This AZ-204 practice question tests your understanding of connect to and consume azure services and third-party services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You are building a solution that uses Azure Cosmos DB for NoSQL. You need to implement a change feed processor to handle real-time updates. The application runs on multiple instances to ensure high availability. Which lease container configuration ensures that each instance processes a distinct set of partitions?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a separate lease container with partition key /id
The change feed processor uses a lease container to distribute work across instances. Each instance acquires leases on partitions. To ensure distinct processing, the lease container must be configured with a partition key that allows the processor to assign different lease documents to different instances. The partition key of the lease container is '/id' by default, which is a unique identifier. Option A is wrong because the monitored container's partition key is irrelevant to instance distribution. Option C is wrong because throughput is not directly related to partition distribution. Option D is wrong because the change feed is processed from the beginning only if not already stored; it doesn't ensure distinct processing.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Set the partition key of the monitored container to /city
Why it's wrong here
The partition key of the monitored container affects how data is partitioned, not how leases are distributed among instances.
✗
Configure the change feed to start from the beginning
Why it's wrong here
Starting from the beginning is about when to read changes, not about distributing processing across instances.
✓
Use a separate lease container with partition key /id
Why this is correct
The lease container's partition key /id allows the change feed processor to distribute leases across instances.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set the lease container's throughput to 1000 RU/s
Why it's wrong here
Throughput affects performance but not partition distribution among instances.
Common exam traps
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.
Detailed technical explanation
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Identify which AZ-204 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Connect to and consume Azure services and third-party services — This question tests Connect to and consume Azure services and third-party services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a separate lease container with partition key /id — The change feed processor uses a lease container to distribute work across instances. Each instance acquires leases on partitions. To ensure distinct processing, the lease container must be configured with a partition key that allows the processor to assign different lease documents to different instances. The partition key of the lease container is '/id' by default, which is a unique identifier. Option A is wrong because the monitored container's partition key is irrelevant to instance distribution. Option C is wrong because throughput is not directly related to partition distribution. Option D is wrong because the change feed is processed from the beginning only if not already stored; it doesn't ensure distinct processing.
What should I do if I get this AZ-204 question wrong?
Identify which AZ-204 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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