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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Design and implement data distribution | 5-10% | - Design replication strategy
|
| Topic 2: Maintain an Azure Cosmos DB solution | 25-30% | - Implement security
|
| Topic 3: Optimize an Azure Cosmos DB solution | 15-20% | - Optimize query performance
|
| Topic 4: Integrate an Azure Cosmos DB solution | 5-10% | - Integrate with Azure services
|
| Topic 5: Design and implement data models | 35-40% | - Design partitioning strategy
|
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NEW QUESTION # 57
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 # 58
Note: This section contains one or more sets of questions with the same scenario and problem. Each question presents a unique solution to the problem. You must determine whether the solution meets the stated goals. More than one solution in the set might solve the problem. It is also possible that none of the solutions in the set solve the problem.
After you answer a question in this section, you will NOT be able to return. As a result, these questions do not appear on the Review Screen.
You have an Azure Cosmos DB for NoSQL database. The database hosts a container named families that stores data in the following format.
You need to return the following data:
- The ID of the family
- The family names of the children
- The name of any pets if the pet is a cat
Solution: You run the following query.
Does this meet the goal?
Answer: A
Explanation:
Correct:
Use two JOINS and one subquery, not three JOINS and a subquery.
* You run the following query.
The following Azure Cosmos DB NoSQL query fulfills the requirements by unnesting child array items and filtering the pet array:
To retrieve the family ID, the children's family names, and the rabbit's name, you can use the query below.
SELECT f.id, c.familyName AS FamilyName, p.givenName AS petName
FROM families f
JOIN f.children c
JOIN (SELECT VALUE p FROM p IN c.pets WHERE p.type = 'cat') AS p
1. Flatten the Children Array
To access individual properties within the children sub-array, use a JOIN statement. In Azure Cosmos DB, a JOIN performs an inner product between the document root (f) and the array (f.children). This filters out any family documents that contain no children.
2. Isolate Cat Pets
To inspect the properties of the pets array embedded inside each child, apply a secondary JOIN on c.pets. The WHERE clause then filters these projected items to only include cases where the property $p.type$ matches the string "cat".
3. Project Specific Attributes
The SELECT clause restricts the final JSON output schema to contain exactly three custom- aliased properties:
familyId: Extracted from the root document
IDchildFamilyName: Extracted from the current child item
iterationpetName: Extracted from the matching pet item iteration
Incorrect:
* You run the following query.
Use two JOINS and one subquery, not three JOINS and a subquery.
* You run the following query.
CROSS APPLY should not be used.
Reference:
https://learn.microsoft.com/en-us/cosmos-db/query/subquery
NEW QUESTION # 59
You have an Azure Cosmos DB for NoSQL account named account1.
You have an app named App1 that connects to account1 and uses strong consistency for all requests.
You implement the Azure Cosmos DB integrated cache for account1.
You need to ensure that App1 uses the integrated cache.
What should you do?
Answer: A
Explanation:
To use the Azure Cosmos DB integrated cache, you must modify your application configuration to route requests through the Dedicated Gateway and, crucially, relax the consistency level for those specific requests.
The integrated cache does not support Strong consistency. If a request uses Strong consistency, it will automatically bypass the cache and go directly to the backend partitions.
Relax Request Consistency
Since your app currently uses Strong consistency, you must override this at the request level for any read (point read or query) that you want to be cached.
The cache only supports Session or Eventual consistency.
Session consistency is recommended to maintain the "read-your-own-writes" guarantee while still utilizing the cache.
Reference:
https://learn.microsoft.com/en-us/azure/cosmos-db/integrated-cache
NEW QUESTION # 60
You have a container that stores data about families. The following is a sample document.
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:
Children who do no have parents defined will appear on the list = NO
Children who do not have parents defined will not appear on the list. This is because the document schema defines the children property as an array of objects that contain the firstName and gender properties of each child, as well as a parents property that references the id values of the parents. If a child does not have parents defined, it means that the parents property is either missing or empty for that child. Therefore, such a child will not be included in the list of children who have parents defined.
Children who have more than one pet will appear on the list multiple times. = Yes Children who have more than one pet will appear on the list multiple times. This is because the document schema defines the pets property as an array of objects that contain the givenName and type properties of each pet, as well as a children property that references the id values of the children who own the pet. If a child has more than one pet, it means that the child's id value will appear in the children property of multiple pet objects. Therefore, such a child will be included in the list of children who have pets multiple times.
Children who do no have pets defined will appear on the list = No
Children who do not have pets defined will not appear on the list. This is because the document schema defines the pets property as an array of objects that contain the givenName and type properties of each pet, as well as a children property that references the id values of the children who own the pet. If a child does not have pets defined, it means that the child's id value does not appear in the children property of any pet object.
Therefore, such a child will not be included in the list of children who have pets defined.
NEW QUESTION # 61
You have a container in an Azure Cosmos DB for NoSQL account that stores data about orders. The following is a sample of an order document.
Documents are up to 2 KB.
You plan to receive one million orders daily.
Customers will frequently view then past order history.
You are the evaluating whether to use orderDate as the partition key.
What are two effects of using orderDate as the partition key? Each correct answer presents a complete solution.
NOTE: Each correct selection is worth one point.
Answer: A,B
NEW QUESTION # 62
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