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Microsoft DP-420 Exam Syllabus Topics:

SectionWeightObjectives
Design and implement data distribution5-10%- Design and implement replication strategy
  • 1. Evaluate consistency model impacts
  • 2. Define automatic failover policies
  • 3. Perform manual failovers
  • 4. Choose a consistency model
  • 5. Choose when to distribute data
- Design and implement multi-region writes
  • 1. Implement conflict resolution policies
  • 2. Choose when to use multi-region writes
  • 3. Implement multi-region writes
Integrate an Azure Cosmos DB solution5-10%- Enable analytical workloads
  • 1. Query analytical store from Synapse
  • 2. Write data back from Spark
  • 3. Enable analytical store
  • 4. Configure Azure Cosmos DB Mirroring
- Implement solutions across services
  • 1. Use Change Feed for denormalization
  • 2. Integrate Azure Functions and Event Hubs
  • 3. Enforce referential integrity
  • 4. Implement Azure AI Search integration
  • 5. Aggregate and archive data
Design and implement data models35-40%- Design a data partitioning strategy
  • 1. Choose a partition key
  • 2. Choose a partitioning strategy
  • 3. Plan for transactions with partition keys
  • 4. Evaluate cross-partition query cost
  • 5. Evaluate throughput and data distribution
  • 6. Implement synthetic partition keys
- Implement server-side programming
  • 1. Implement user-defined functions
  • 2. Implement triggers
  • 3. Write and deploy stored procedures
- Implement data access
  • 1. Manage transactional batch operations
  • 2. Implement SQL queries with arrays and aggregation
  • 3. Implement optimistic concurrency control
  • 4. Use SDKs for CRUD operations
  • 5. Implement patch operations
  • 6. Use consistency and query request options
- Plan and implement sizing and scaling
  • 1. Evaluate global distribution costs
  • 2. Configure throughput
  • 3. Choose between serverless, provisioned, and free tier
  • 4. Evaluate throughput and storage requirements
  • 5. Design resource governance and scaling
- Implement client connectivity options
  • 1. Choose gateway or direct connectivity mode
  • 2. Implement singleton client
  • 3. Use Azure Cosmos DB emulator
  • 4. Handle connection errors
  • 5. Configure client-side threading and logging
  • 6. Create database connections
- Design and implement a non-relational data model for Azure Cosmos DB for NoSQL
  • 1. Identify data and associated access patterns
  • 2. Store multiple entity types in the same container
  • 3. Identify partition key, id, and unique keys
  • 4. Reference between documents
  • 5. Denormalize data across documents
  • 6. Store multiple related entities in the same document
Maintain an Azure Cosmos DB solution25-30%- Monitor and troubleshoot Azure Cosmos DB solutions
  • 1. Implement backup and recovery strategies
  • 2. Monitor metrics and logs
  • 3. Monitor performance and availability
  • 4. Troubleshoot throughput issues
Optimize an Azure Cosmos DB solution15-20%- Design and implement change feeds
  • 1. Consume change feeds using SDK
  • 2. Manage change feed instances
  • 3. Develop Azure Functions triggers
  • 4. Implement aggregation persistence
- Define and implement indexing strategy
  • 1. Configure custom indexing policies
  • 2. Choose read-heavy or write-heavy indexing
  • 3. Implement composite indexes
  • 4. Choose appropriate index types
  • 5. Optimize index performance
- Optimize query performance
  • 1. Retrieve request unit cost
  • 2. Implement integrated cache
  • 3. Adjust indexing policies
  • 4. Calculate query cost

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最新的 Azure Cosmos DB Developer Specialty DP-420 免費考試真題 (Q49-Q54):

問題 #49
You have an Azure Cosmos DB for NoSQL account that has multiple write regions.
You need to receive an alert when requests that target the database exceed the available request units per second (RU/s).
Which Azure Monitor signal should you use?

答案：D

解題說明：
The recommended signal in Azure Monitor is Provisioned Throughput.
To receive an alert when requests target the database and exceed the available request units per second (RU/s), the Provisioned Throughput metric is used to track the number of request units (RUs) assigned to your resources.
Signal Selection Explained
When requests exceed the provisioned RU/s, Azure Cosmos DB returns a 429 (Too Many Requests) status code. Monitoring throughput helps you proactively manage capacity and costs.
Provisioned Throughput: This metric monitors the RU/s currently configured for a container or database. Using this signal allows you to set alert thresholds based on the maximum RUs your account can handle.
Total Requests (Alternative): While not one of the options, a common way to alert on throttling is to use the Total Requests metric and filter by the 429 status code.
Incorrect:
[Not A]
Document Count tracks the number of items stored; it does not reflect request traffic or RU usage.
[Not B]
Metadata Requests monitors operations like creating or listing containers, which are separate from standard data requests.
[Not D]
Region Removed is a control-plane event related to high availability and global distribution, not throughput consumption.
Reference:
https://learn.microsoft.com/en-us/azure/cosmos-db/troubleshoot-request-rate-too-large


問題 #50
You have a container named container1 in an Azure Cosmos DB for NoSQL account. Upserts of items in container1 occur every three seconds.
You have an Azure Functions app named function1 that is supposed to run whenever items are inserted or replaced in container1.
You discover that function1 runs, but not on every upsert.
You need to ensure that function1 processes each upsert within one second of the upsert.
Which property should you change in the Function.json file of function1?

答案：B

解題說明：
With an upsert operation we can either insert or update an existing record at the same time.
FeedPollDelay: The time (in milliseconds) for the delay between polling a partition for new changes on the feed, after all current changes are drained. Default is 5,000 milliseconds, or 5 seconds.
Incorrect Answers:
A: checkpointInterval: When set, it defines, in milliseconds, the interval between lease checkpoints.
Default is always after each Function call.
C: maxItemsPerInvocation: When set, this property sets the maximum number of items received per Function call. If operations in the monitored collection are performed through stored procedures, transaction scope is preserved when reading items from the change feed. As a result, the number of items received could be higher than the specified value so that the items changed by the same transaction are returned as part of one atomic batch.
Reference: https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-cosmosdb- v2-trigger


問題 #51
You have an application named App1 that reads the data in an Azure Cosmos DB for NoSQL account. App1 runs the same read queries every minute. The default consistency level for the account is set to eventual.
You discover that every query consumes request units (RUs) instead of using the cache.
You verify the IntegratedCacheiteItemHitRate metric and the IntegratedCacheQueryHitRate metric. Both metrics have values of 0.
You verify that the dedicated gateway cluster is provisioned and used in the connection string.
You need to ensure that App1 uses the Azure Cosmos DB integrated cache.
What should you configure?

答案：A

解題說明：
Because the integrated cache is specific to your Azure Cosmos DB account and requires significant CPU and memory, it requires a dedicated gateway node. Connect to Azure Cosmos DB using gateway mode.
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/integrated-cache-faq


問題 #52
You provision Azure resources by using the following Azure Resource Manager (ARM) template.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

答案：

解題說明：


問題 #53
You have an Azure Cosmos DB for NoSQL account that contains a container named container1.
You plan to use container1 as a key-value store that will perform point reads on the item ID and partition key.
You need to define an indexing policy for container! The solution must meet the following requirements:
* Provide the ability to set DefauitTimeToLive for container1.
* Minimize implementation time.
* Minimize costs.
How should you complete the JSON definition of the indexing policy? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

答案：

解題說明：

Explanation:


問題 #54
......

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