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Azure > Azure CosmoDB > Flashcards

Azure CosmoDB Flashcards

1
Q

What is Azure Cosmos DB?

A

Azure Cosmos DB is a globally distributed, multi-model database service that offers low-latency and high-availability.

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2
Q

What are the key models supported by Azure Cosmos DB?

A

It supports multiple data models such as key-value, document, graph, and column-family.

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3
Q

What is the purpose of Cosmos DB in Azure architecture?

A

The purpose of Cosmos DB is to provide globally distributed, low-latency access to NoSQL and relational data with high availability.

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4
Q

What are the major use cases for Azure Cosmos DB?

A

Real-time IoT data processing, retail transactions, social media analytics, gaming leaderboards.

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5
Q

How does Azure Cosmos DB ensure high availability?

A

By replicating data globally across multiple regions and offering SLAs for 99.999% availability.

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6
Q

What are the primary data consistency levels in Azure Cosmos DB?

A

Strong, Bounded Staleness, Session, Consistent Prefix, and Eventual consistency.

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7
Q

What is the default consistency level in Cosmos DB?

A

Session consistency is the default level, providing a balance between performance and consistency.

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8
Q

How is data ingested into Azure Cosmos DB?

A

Data is ingested through RESTful APIs, SDKs, and data migration tools like Azure Data Factory.

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9
Q

What is the maximum data size for a single Cosmos DB partition?

A

The maximum size for a single partition is 20 GB.

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10
Q

What is a partition key in Azure Cosmos DB?

A

A partition key is a unique value used to distribute data across multiple partitions for scalability.

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11
Q

How does Cosmos DB store data?

A

Cosmos DB stores data across distributed partitions and retains it based on the storage capacity you configure.

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12
Q

What are the main governance features of Cosmos DB?

A
  1. role-based access control (RBAC),
  2. Azure Policy integration, 3. Auditing through Azure Monitor.
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13
Q

How does Cosmos DB achieve scalability?

A

It achieves scalability through automatic partitioning of data and horizontal scaling across multiple regions.

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14
Q

How is security managed in Cosmos DB?

A

Security is managed through encryption-at-rest, encryption-in-transit, VNET isolation, and identity-based access control.

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15
Q

What unit of measurement is Cosmo DB using to measure messing throughput

A

Throughput is measured in Request Units (RUs), and determines the cost of operations on the database.

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16
Q

How does Azure Cosmos DB optimize performance?

A

Through features like Request Units (RUs) per second and the use of SSD storage to ensure low-latency operations.

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17
Q

What are the disaster recovery options in Azure Cosmos DB?

A

Automatic regional failover, multi-region writes, and geo-replication for business continuity.

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18
Q

What Azure services can be integrated with Azure Cosmos DB?

A

Azure Functions, Azure Synapse, Azure Event Hubs, and Power BI can be integrated with Cosmos DB.

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19
Q

How does Cosmos DB ensure data durability?

A

Cosmos DB ensures durability through automatic backups and geo-replication.

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20
Q

What is a key feature of Cosmos DB’s global distribution?

A

It allows data to be transparently replicated to any number of Azure regions globally.

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21
Q

How does Cosmos DB handle multi-region writes?

A

Cosmos DB supports multi-region writes for applications that require high availability and low-latency writes.

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22
Q

What is the primary benefit of partitioning in Cosmos DB?

A

Partitioning allows Cosmos DB to scale horizontally by distributing data across multiple servers.

23
Q

Are backups manual and what is retention period?

A

It offers automated backups, with a retention period of up to 30 days.

24
Q

What does Azure Cosmos DB provide SLA guarantees on?

A

Cosmos DB offers SLAs for throughput, latency, consistency, and availability.

25
Q

What are request units (RUs) in Cosmos DB?

A

Request Units represent the throughput of Cosmos DB, and every operation consumes a specific number of RUs.

26
Q

What are the performance tiers in Cosmos DB?

A

Provisioned throughput and Autoscale and serverless

27
Q

What is Cosmos DB Autoscale?

A

Autoscale automatically scales the throughput (RUs) of a database based on workload demands.

28
Q

What is the Cosmos DB latency for W and R?

A

Cosmos DB is designed to provide single-digit millisecond latency for both reads and writes.

29
Q

What is a replica set in Cosmos DB?

A

A replica set in Cosmos DB consists of multiple copies of the data distributed across regions.

30
Q

What is the consistency guarantee in Azure Cosmos DB?

A

Cosmos DB guarantees consistency across replicas based on the selected consistency model.

31
Q

What disaster recovery mechanism is provided by Cosmos DB?

A

Cosmos DB offers automatic regional failover for disaster recovery.

32
Q

What is the primary function of multi-region replication in Cosmos DB?

A

It ensures high availability and low-latency access by replicating data across multiple regions.

33
Q

Why does Cosmos DB integrate with Azure Active Directory?

A

It integrates with Azure AD to provide identity-based access control and RBAC.

34
Q

What feature ensures Cosmos DB data consistency across regions?

A

Cosmos DB offers multiple consistency levels, allowing you to control the tradeoff between consistency and performance.

35
Q

What is the main benefit of Cosmos DB’s serverless option?

A

The serverless option allows you to pay only for the resources consumed, making it cost-effective for intermittent workloads.

36
Q

What is the role of change feed in Cosmos DB?

A

Change feed allows you to track updates and inserts in the database and process them in real-time using Azure Functions and Azure Event Grid. Delete is not supported.

37
Q

Is the cross region replication manual and why perform cross region replication?

A

Cosmos DB uses automatic, transparent cross-region replication to ensure data availability.

38
Q

What role does TTL (Time to Live) play in Cosmos DB?

A

TTL automatically deletes expired data based on a time-to-live setting for a collection or item.

39
Q

What query languages are supported in Cosmos DB?

A

Cosmos DB supports SQL queries, MongoDB API, Gremlin for graph queries, and more.

40
Q

What are Azure Cosmos DB APIs?

A

Cosmos DB supports multiple APIs, including SQL, MongoDB, Gremlin, Cassandra, and Table API.

41
Q

What is the role of Cosmos DB’s indexing feature?

A

Cosmos DB automatically indexes all data for fast query performance without requiring schema or index management.

42
Q

What is the Cosmos DB Free Tier?

A

The Free Tier provides 400 RUs and 5 GB of storage for free to help new users start using the service.

43
Q

What is a Gremlin API in Cosmos DB?

A

Gremlin API is used for graph-based data modeling and queries within Cosmos DB.

44
Q

How is geo-fencing achieved in Cosmos DB?

A

Geo-fencing is implemented through region selection and data residency policies, ensuring data stays within specific geographic regions.

45
Q

What tool can be used for migrating data to Cosmos DB?

A

Azure Database Migration tool can be used to migrate data into Cosmos DB.

46
Q

How does Azure Monitor support Cosmos DB?

A

Azure Monitor provides metrics, logging, and alerts to monitor the health and performance of Cosmos DB instances.

47
Q

Why does Cosmos DB integrate with Azure Synapse?

A

Cosmos DB integrates with Synapse to enable big data analytics on Cosmos DB data using SQL and Spark.

48
Q

Describe CosmoDB

A

Fully managed, distributed NoSQL, relational, and vector database for modern app development. High performance, high availability, and support for open-source PostgreSQL, MongoDB, and Apache Cassandra. Build cloud-native apps effortlessly.

49
Q

When using CosmoDB, what API would I use for json document

A
  1. SQL
  2. Mongo
50
Q

When using CosmoDB, what am I storing when I use table?

A

Key/value

51
Q

When using CosmoDB what am I storing when I use casanfra?

A

Colum based data

52
Q

When using CosmoDB and Gremlin, what am I storing?

A

Graph database, using edges and vitric

53
Q

When using CosmoDB , what type of database is Casandra database?

A

Colum based data

Azure (42 decks)

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