Develop for Azure storage

A company stores archival data in Azure Blob Storage. The data is accessed only a few times per year, and retrieval can take up to 15 hours. Which blob access tier minimizes storage costs while meeting these requirements?

You are building a serverless application that needs to react to insertions and updates in an Azure Cosmos DB container. You want to process these changes using an Azure Function. Which trigger should you configure for the function?

You are developing an application that writes logs to Azure Blob Storage. Each log entry is small (less than 1 KB) and you need to store millions of entries per day. You want to minimize storage costs and maximize write throughput. Which blob type should you use?

You need to upload large files (up to 100 GB) to Azure Blob Storage from a web application. The upload must be resilient to network failures and support pausing/resuming. Which approach should you use?

You need to store millions of small log entries (each <1 KB) per day from an IoT device. The logs are rarely read. Which storage solution is most cost-effective?

You are developing an application that writes log entries to Azure Blob Storage. Each log entry is approximately 500 bytes, and you expect to generate millions of entries per day. The logs are rarely read, and when they are read, you need to retrieve ranges of logs sequentially. Which blob type should you use to minimize storage costs and maximize write throughput?

An application stores large media files (up to 5 GB) that are frequently appended to but rarely read sequentially. Which Azure Blob Storage type should be used to optimize writes and cost?

You are developing a .NET Core application that stores session state data. The data is infrequently updated but must be read quickly for every user request. You need a serverless, globally distributed storage solution with low latency reads. Which Azure storage solution should you use?

You need to store large binary files (up to 2 GB) that are frequently overwritten in place (entire file replaced). You want to minimize storage cost and write latency. Which Azure Blob Storage type should you use?

An application writes millions of small log entries (500 bytes each) daily. The logs are rarely read, and when read, they are accessed sequentially. You need to minimize storage costs and maximize write throughput. Which Azure Blob Storage type should you use?

You are building an IoT solution that generates millions of small log entries (each less than 1 KB) per day. The logs are rarely read, and when they are read, they are always accessed in chronological order. You need to minimize storage costs and maximize write throughput. Which Azure Blob Storage type should you use?

You need to store a large (terabytes) append-only dataset for compliance purposes. The data must be immutable to prevent tampering after writes. You also want to minimize storage cost and achieve high write throughput. Which Azure Storage solution should you use?

You are building a compliance solution that stores terabytes of data in Azure Blob Storage. Data is appended frequently and never modified. Regulatory requirements mandate that no data can be overwritten or deleted for 7 years. Which storage configuration should you enable?

You are building a data pipeline that writes billions of small log records (each ~200 bytes) to Azure Blob Storage. The logs are always written in chronological order and are read sequentially in order. You must minimize storage cost and achieve maximum write throughput. Which blob type should you use?

You have an Azure Storage account that contains a blob container with thousands of small files. You need to generate a URL that allows users to download a single file for a limited time without changing the storage account's firewall rules or requiring authentication. Which approach should you use?

You design an application that writes millions of small sensor readings (each ~100 bytes) to Azure Blob Storage. The data is appended to files every minute and after 7 days it is archived for compliance. You need to minimize write costs and storage costs. Which blob type and tier strategy should you use?

You need to store terabytes of archival data that must be retained for 10 years. The data is accessed once or twice per year. You need to minimize storage costs. Which Azure Storage tier should you use?

You are designing a solution that writes millions of small log records (each 200 bytes) to Azure Blob Storage. The logs are written every second, always appended to a single file. The file must be read periodically by a batch process that reads the entire file. You need to maximize write throughput and minimize storage costs. Which blob type and access strategy should you choose?

You need to store large files that are written once and then frequently read for the first 30 days. After 30 days, the files are rarely accessed (once or twice per year) but must remain available for 5 years. You want to minimize storage costs. Which storage tier and lifecycle management rule should you apply?

You need to store billions of small log entries (each ~200 bytes) written in chronological order from multiple producers. The logs are read sequentially in bulk once per day. You need to maximize write throughput and minimize storage costs. Which Azure Storage solution should you choose?

You need to store millions of small JSON documents (each ~1 KB) that are frequently updated by multiple concurrent users. You require low-latency access to individual documents. Which Azure Storage solution should you use?

You are designing a backup solution for a virtual machine. Monthly backups are large VHD files (up to 1 TB) that must be retained for 7 years. After creation, backups are accessed only rarely (once or twice per year). You need to minimize storage cost. Which storage tier should you use for the VHD files?

You are building a serverless application that needs to store user profile data. The data includes simple fields like name, email, and preferences. The data is frequently accessed by user ID. You need a schema-less, low-latency storage solution that is cost-effective for millions of small records. Which Azure Storage solution should you use?

You are designing a solution to ingest billions of small IoT sensor messages (each ~500 bytes). Messages arrive at high velocity and must be retained for 90 days. You need to query the data efficiently by device ID and timestamp. You want to minimize storage cost and write latency. Which Azure Storage solution should you use?

You need to store large amounts of unstructured data (images and videos) that are accessed rarely (a few times per year) but must be available within minutes when requested. The data must be geo-redundant for disaster recovery. You want to minimize storage costs. Which storage tier and redundancy option should you choose?

You need to store billions of small log entries (each ~200 bytes) generated from multiple IoT devices. The logs are written in chronological order and are rarely updated. You need to run queries that scan large ranges of data by timestamp each day. You want to maximize write throughput and minimize storage costs. Which Azure Storage solution should you choose?

Your company stores backup files in an Azure Blob Storage account. These files are written once and then need to be retained for 7 years. During the first year, the files are accessed weekly. After the first year, they are accessed rarely (once per month). You want to minimize storage costs. Which combination of access tiers and lifecycle management should you apply?

You need to store billions of small telemetry data entries (each ~100 bytes) from IoT devices. The data is written once and rarely updated. You need to run analytical queries on the last 30 days of data daily. The queries scan large ranges of data by timestamp and require sub-second response times. You need the lowest storage cost while meeting query latency requirements. Which Azure Storage solution should you use?

You are building a web application that allows users to upload profile pictures. The images are up to 5 MB in size and must be stored durably. The images are accessed infrequently after upload (a few times per month). You want to minimize storage costs while ensuring the data is available within seconds when requested. Which Azure Blob Storage access tier should you use for the blob container?

You are developing a C# application that stores sensitive documents in Azure Blob Storage. The application needs to generate a time-limited shared access signature (SAS) that allows a client to only read and list blobs in a specific container. The SAS must be valid for exactly 1 hour from the current time. Which code snippet correctly creates the SAS? (Assume the BlobServiceClient and BlobContainerClient are properly initialized.)

You are developing an IoT solution that stores device metadata (device ID, location, firmware version, last seen timestamp) in Azure Table Storage. Each device has a unique DeviceId and a Timestamp. You need to design the PartitionKey and RowKey to optimize query performance for the following query: Retrieve all firmware versions for devices in a specific city that were last seen within the last 24 hours. The query must be efficient (partition scan minimized). Which key design is most appropriate?

You are designing a solution to store user-uploaded images. The images are accessed infrequently (a few times per month) and must be available for download within seconds when requested. You need to minimize storage costs while meeting the access requirements. Which Azure Blob Storage access tier should you choose for the container?

You are designing an Azure Table Storage table to store temperature readings from IoT devices. Each reading includes a device ID (string), timestamp (datetime), temperature value, and location. You need to optimize the table design for this query: "Retrieve all temperature readings for a specific device ID within a given one-hour time range." The query must be efficient and minimize partition scans. Which PartitionKey and RowKey combination should you use?

You are designing a solution that needs to react to changes in an Azure Cosmos DB container in real-time. Whenever a new document is inserted or updated, a downstream service must be triggered to process the change. You want to build a serverless solution that reliably captures each change exactly once. Which Azure Cosmos DB feature should you use?

Your IoT solution generates billions of small telemetry entries (each ~100 bytes). Data is written once and rarely updated. You need to run analytical queries on the last 30 days of data daily, scanning large ranges by timestamp, requiring sub-second response times. You want the lowest storage cost. Which Azure Storage solution should you use?

You need to store temperature readings from IoT devices in Azure Table Storage. Each reading includes a device ID (string), timestamp (datetime), temperature value, and location. You must optimize for the query: "Retrieve all temperature readings for a specific device ID within a given one-hour time range." Which PartitionKey and RowKey combination should you use?

You develop a C# application that stores sensitive documents in Azure Blob Storage. You need to generate a time-limited shared access signature (SAS) that allows a client to only read and list blobs in a specific container. The SAS must be valid for exactly 1 hour from the current time. Which code snippet correctly creates the SAS? (Assume BlobServiceClient and BlobContainerClient are properly initialized.)

You are developing a solution that requires multiple Azure virtual machines to access the same set of files concurrently. The files are updated frequently and must be accessible with low latency. You need to choose a shared storage solution that integrates with Microsoft Entra ID (Microsoft Entra ID) for authentication. Which Azure storage solution should you use?

You are developing a solution that stores user-uploaded profile pictures. Users upload pictures that are then displayed on their profile page. After 30 days, if the user hasn't logged in, the system moves the picture to cold storage. You need to choose the initial access tier for the container to optimize cost and performance for frequently accessed pictures. Which tier should you use?

You are processing messages from an Azure Storage queue in a worker role. To handle messages that repeatedly fail, you want to move them to a separate 'poison' queue after 5 delivery attempts. Which property of the received message should you check to determine the number of attempts?

You store application logs in Azure Blob Storage. The logs are accessed frequently for the first 7 days, then rarely. After 30 days, they must be deleted to minimize cost. Which approach should you use?

You need to allow a client application to read a specific blob from Azure Blob Storage for one hour, without exposing your storage account key. Which approach should you use?

You are developing a solution that stores large media files in Azure Blob Storage. Users access these files frequently for the first 30 days, then rarely afterwards. To optimize costs, you need to automatically move blobs to a cooler tier after 30 days of creation. Which Azure feature should you use?

You need to store small binary blobs (average 50 KB) that are accessed very frequently for a short period, then never accessed again. The total volume is high. Which storage tier is most cost-effective for the initial upload?

You are developing an application that stores user-uploaded profile pictures in Azure Blob Storage. Users frequently access these pictures for the first 7 days after upload, then rarely. To minimize costs, you need to automatically delete pictures that are older than 30 days. Which Azure Storage feature should you use to achieve this?

An application stores customer invoices in Azure Blob Storage. Deleted blobs must be recoverable for 14 days. What should be enabled?

A storage account for thumbnail metadata must allow an application to read only blobs under one container for two hours. The application should not receive the account key. What should be issued?

A Cosmos DB container for session records receives hot-partition throttling because the partition key has only five possible values. What should the developer change?

A serverless app must react whenever audit documents are inserted or updated in Cosmos DB. Which trigger should the Azure Function use?

A Blob Storage workflow for product images must prevent accidental overwrite and support recovery of prior versions. Which two features should be enabled?

A queue-processing application stores work items in Azure Queue Storage. A worker crashes after receiving a message. What determines when the message becomes available for another worker?

A .NET app performs point reads from Cosmos DB by id and partition key. The team wants the lowest latency and best throughput efficiency. Which API call pattern should be used?

An application needs to upload large thumbnail metadata to Blob Storage reliably over unstable networks. Which upload approach should be used?

A table stores session records in Azure Table Storage. Queries frequently retrieve all records for one customer in a time range. What key design is best?

A Blob-triggered function processing audit documents fires multiple times for the same blob after retries. What should the function design include?

An app must store relational state and perform transactions across multiple tables with T-SQL support. Which Azure data service should the developer choose?

A Cosmos DB workload for telemetry events has predictable traffic during business hours and almost no traffic overnight. The team wants to reduce cost while keeping performance during peak hours. What should be configured?

An application stores customer invoices in Azure Blob Storage. Deleted blobs must be recoverable for 14 days. What should be enabled? The design must avoid adding custom operational scripts.

A storage account for thumbnail metadata must allow an application to read only blobs under one container for two hours. The application should not receive the account key. What should be issued? The design must avoid adding custom operational scripts.

A Cosmos DB container for session records receives hot-partition throttling because the partition key has only five possible values. What should the developer change? The design must avoid adding custom operational scripts.

A serverless app must react whenever audit documents are inserted or updated in Cosmos DB. Which trigger should the Azure Function use? The design must avoid adding custom operational scripts.