Question 437 of 982

Describe considerations for working with non-relational data on Azure →mediumMultiple ChoiceObjective-mapped

DP-900 Practice Question: Describe considerations for working with non-relational data on Azure

This DP-900 practice question tests your understanding of describe considerations for working with non-relational data on azure. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.

A social networking application uses Azure Cosmos DB to store user posts. When a user publishes a new post, they immediately refresh their feed and expect to see their own post. However, the application can tolerate temporary staleness for posts from other users (e.g., a few seconds delay). Which Azure Cosmos DB consistency level should the application use for read operations that display the feed?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.

Question 1mediummultiple choice

Full question →

A
Strong
Why wrong: Strong consistency guarantees linearizability (reads always see the latest write globally), but this introduces higher latency and is more expensive. It is overkill for this requirement where only the writer needs immediate consistency.
B
Bounded staleness
Why wrong: Bounded staleness allows reads to lag behind writes by a configurable time interval or number of versions. While it could work, it is a stricter guarantee than needed (the application only needs session-level consistency) and may have higher latency than session consistency.
C
Session
Session consistency uses a session token to ensure that within the same client session, reads reflect the writes made by that client. This satisfies the requirement that the user sees their own post immediately, while other reads may see slightly stale data.
D
Eventual
Why wrong: Eventual consistency does not guarantee that a user will read their own write immediately. There could be a delay, so the user might not see their own post right after publishing, which breaks the requirement.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Session

Session consistency is the correct choice because it guarantees that the user who writes a post will read their own write within the same session, while allowing other users to see slightly stale data. This matches the requirement: the author immediately sees their new post, but the application can tolerate a few seconds of staleness for other users' posts. Session consistency uses a session token to ensure monotonic reads and writes for the same client, making it ideal for per-user feed scenarios.

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.

✗
Strong
Why it's wrong here
Strong consistency guarantees linearizability (reads always see the latest write globally), but this introduces higher latency and is more expensive. It is overkill for this requirement where only the writer needs immediate consistency.
✗
Bounded staleness
Why it's wrong here
Bounded staleness allows reads to lag behind writes by a configurable time interval or number of versions. While it could work, it is a stricter guarantee than needed (the application only needs session-level consistency) and may have higher latency than session consistency.
✓
Session
Why this is correct
Session consistency uses a session token to ensure that within the same client session, reads reflect the writes made by that client. This satisfies the requirement that the user sees their own post immediately, while other reads may see slightly stale data.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Eventual
Why it's wrong here
Eventual consistency does not guarantee that a user will read their own write immediately. There could be a delay, so the user might not see their own post right after publishing, which breaks the requirement.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse 'session' with 'eventual' because both allow staleness, but session guarantees per-user write-read consistency, which eventual does not, and they overlook that bounded staleness applies globally, not per-user.

Detailed technical explanation

How to think about this question

Under the hood, Azure Cosmos DB's session consistency uses a session token (a string containing the write timestamp and partition key) that the client sends with each request. The SDK automatically manages this token, ensuring that reads within the same session see writes from that session, even if the read replica hasn't fully replicated the write yet. In a real-world scenario, this is critical for social feeds where a user's own post must appear instantly, but the system can tolerate eventual consistency for other users' content, reducing write latency and improving throughput.

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.

TExam Day Tips

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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this DP-900 question test?

Describe considerations for working with non-relational data on Azure — This question tests Describe considerations for working with non-relational data on Azure — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Session — Session consistency is the correct choice because it guarantees that the user who writes a post will read their own write within the same session, while allowing other users to see slightly stale data. This matches the requirement: the author immediately sees their new post, but the application can tolerate a few seconds of staleness for other users' posts. Session consistency uses a session token to ensure monotonic reads and writes for the same client, making it ideal for per-user feed scenarios.

What should I do if I get this DP-900 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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