Knowledge check

1.

Which block of code should be used to create a client to connect to the Azure Cosmos DB account with only a connection string?

string connectionString = "<cosmos-connection-string>";
using CosmosClient client = new(connectionString);

string connectionString = "<cosmos-connection-string>";
using CosmosClient client = new(connectionString, "");

string connectionString = "<cosmos-connection-string>";
using CosmosClient client = new();

2.

Consider a new Azure Cosmos DB account without any resources. Which block of code creates the first server-side resource that is required to store a set of containers?

using CosmosClient client = new(
    connectionString: cosmosConnectionString
);

Container container = await database.CreateContainerIfNotExistsAsync(
    "products",
    partitionKeyPath: "/department",
    throughput: 400
);

Database database = await client.CreateDatabaseIfNotExistsAsync(
    "adventureworks"
);

3.

An item already exists in the Azure Cosmos DB for NoSQL account with a unique identifier of 04b3038c-b966-4a86-a1f3-5d1fa5c2a47c. Which of the following blocks of code replace the existing item in the container with a newly created item without running the risk of creating an entirely new item.

Item item = new("04b3038c-b966-4a86-a1f3-5d1fa5c2a47c", "item-category", "item-name", 0, true);
container.UpsertItemAsync(item);

Item item = new("04b3038c-b966-4a86-a1f3-5d1fa5c2a47c", "item-category", "item-name", 0, true);
container.ReplaceItemAsync("04b3038c-b966-4a86-a1f3-5d1fa5c2a47c", item);

Item item = new("04b3038c-b966-4a86-a1f3-5d1fa5c2a47c", "item-category", "item-name", 0, true);
container.CreateItemAsync(item);

4.

Here's an Azure Cosmos DB for NoSQL query: SELECT * FROM container c WHERE c.partitionKey == 'some-category' ORDER BY c.id. What is the language-integrated query (LINQ) equivalent of this query?

using FeedIterator<Product> feed = container.GetItemLinqQueryable<Item>()
    .OrderBy(i => i.partitionKey)
    .ToFeedIterator();

using FeedIterator<Product> feed = container.GetItemLinqQueryable<Item>()
    .Where(i => i.id == "some-category")
    .ToFeedIterator();

using FeedIterator<Product> feed = container.GetItemLinqQueryable<Item>()
    .Where(i => i.partitionKey == "some-category")
    .OrderBy(i => i.id)
    .ToFeedIterator();

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