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| Section | Objectives |
|---|---|
| Integrate Azure Cosmos DB with Azure services | - Data pipelines and analytics
|
| Optimize and maintain Cosmos DB solutions | - Monitoring and troubleshooting
|
| Design and implement data distribution | - Partitioning and scaling
|
| Design and implement data models for Azure Cosmos DB | - Model data for NoSQL workloads
|
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NEW QUESTION # 142
You have an Azure Cosmos DB Core (SQL) API account named storage1 that uses provisioned throughput capacity mode.
The storage1 account contains the databases shown in the following table.
The databases contain the containers shown in the following table.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Reference:
https://docs.microsoft.com/en-us/azure/cosmos-db/plan-manage-costs
https://azure.microsoft.com/en-us/pricing/details/cosmos-db/
NEW QUESTION # 143
You have a database named telemetry in an Azure Cosmos DB Core (SQL) API account that stores IoT data.
The database contains two containers named readings and devices.
Documents in readings have the following structure.
id
deviceid
timestamp
ownerid
measures (array)
- type
- value
- metricid
Documents in devices have the following structure.
id
deviceid
owner
- ownerid
- emailaddress
- name
brand
model
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Explanation:
Box 1: Yes
Need to join readings and devices.
Box 2: No
Only readings is required. All required fields are in readings.
Box 3: No
Only devices is required. All required fields are in devices.
NEW QUESTION # 144
You have a database in an Azure Cosmos DB for NoSQL account that is configured for multi-region writes.
You need to use the Azure Cosmos DB SDK to implement the conflict resolution policy for a container. The solution must ensure that any conflict sent to the conflict feed.
Solution: You set ConfilictResolutionMode to Custom. You Set ResolutionProcedures to a custom stored procedure. You configure the custom stored procedure to use the isTomstone parameter to resolve conflict.
Does this meet the goal?
Answer: A
Explanation:
Explanation
The solution is incorrect because there is no "isTom" parameter in the Azure Cosmos DB SDK. The correct parameter is "isTombstone".
NEW QUESTION # 145
You have an Azure subscription.
You plan to create an Azure Cosmos DB for NoSQL database named DB1 that will store author and book data for authors that have each published up to ten books. Typical and frequent queries of the data will include:
- All books written by an individual author
- The synopsis of individual books
You need to recommend a data model for DB1. The solution must meet the following requirements:
- Support transactional updates of the author and book data.
- Minimize read operation costs.
What should you recommend?
Answer: C
Explanation:
To support transactional updates of the author and book data we need to use a single container.
Minimize read operations cost: Embed a list of each author's books in the corresponding author item.
Note: Transactional batch operations in Azure Cosmos DB
Transactional batch describes a group of point operations that need to either succeed or fail together with the same partition key in a container. Operations are defined, added to the batch, and the batch is executed. If all operations succeed in the order they're described within the transactional batch operation, the transaction will be committed. However, if any operation fails, the entire transaction is rolled back.
Does Azure Cosmos DB for NoSQL support ACID (atomicity, consistency, isolation, durability) transactions?
Yes, the API for NoSQL supports cross-document transactions expressed using either batches in the SDKs or as JavaScript-stored procedures and triggers. Transactions are scoped to a single partition within each container and executed with ACID semantics as "all or nothing," isolated from other concurrently executing code and user requests. If exceptions occur, the entire transaction is rolled back.
Reference:
https://learn.microsoft.com/en-us/azure/cosmos-db/nosql/transactional-batch
https://learn.microsoft.com/en-us/azure/cosmos-db/nosql/faq
NEW QUESTION # 146
You have a container named container1 in an Azure Cosmos DB for NoSQL account named account1 that is set to the session default consistency level. The average size of an item in container1 is 20 KB.
You have an application named App1 that uses the Azure Cosmos DB SDK and performs a point read on the same set of items in container1 every minute.
You need to minimize the consumption of the request units (RUs) associated to the reads by App1. What should you do?
Answer: B
Explanation:
Explanation
The cost of a point read for a 1 KB item is 1 RU. The cost of other operations depends on factors such as item size, indexing policy, consistency level, and query complexity1. To minimize the consumption of RUs, you can optimize these factors according to your application needs.
For your scenario, one possible way to minimize the consumption of RUs associated to the reads by App1 is to change the consistency level of read requests to consistent prefix. Consistent prefix is a lower consistency level than session, which is the default consistency level for Azure Cosmos DB. Lower consistency levels consume fewer RUs than higher consistency levels2. Consistent prefix guarantees that reads never see out-of-order writes and that monotonic reads are preserved1. This may be suitable for your application if you can tolerate some eventual consistency.
NEW QUESTION # 147
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