Storage

Question 1

What is Locally Redundant Storage (LRS)?

Answer 1

Replicating data 3 times in a single data center. Lowest cost and least redundancy.

Question 2

What is Zone Redundant Storage (ZRS)?

Answer 2

Replicated data across three availability zones in the primary region

Question 3

What is Geo-Redundant Storage (GRS)?

Answer 3

LRS copies data 3 times, then synchronizes data to single physical location in the secondary region.

Question 4

What is Geo-Zone Redundant Storage (GZRS)?

Answer 4

Copes data across 3 availability zones. Then asynchronously copies data to secondary region using LRS

Question 5

What is Read-Access Geo-Redundant Storage (RA-GRS)?

Answer 5

GRS, but the data in the secondary region is read-only

Question 6

What is Read-Access Geo-Zone Redundant Storage?

Answer 6

Data is copied across 3 redundancy zones. Data is copied asynchronously to the secondary region using LRS. The replicated data is read-only

Question 7

What is Azure Blob Storage?

Answer 7

Unstructured object storage. Accessible over HTTP or HTTPS. Good for storing images for a web site, for example.

Question 8

What are the four tiers of storage access?

Answer 8

Hot - Most frequently accessed data. Highest cost to access, quickest to retrieve

Cool - Infrequently accessed data, stored for at least 30 days

Cold - Infrequently accessed data, stored for at least 90 days

Archive - Rarely accessed data, stored for at least 180 days. Lowest storage cost, but highest cost to rehydrate. This data is also OFFLINE

Question 9

What are the types of Azure Blob Storage?

Answer 9

Block - Flat structure
Page - Read/Write over random areas
Append - Useful in logging scenarios

Question 10

Azure Files?

Answer 10

Networked file shares using SMB and NFS protocols

Question 11

Azure File Sync?

Answer 11

Synchronization service for syncing a local Windows Server with Azure Files (file share)

Question 12

Azure Queues?

Answer 12

Message storage in a FIFO configuation

Question 13

Azure Disk Storage?

Answer 13

Block level storage volumes. Designed for use with Virtual Machines.

Question 14

Azure Tables?

Answer 14

Structured data storage - NoSQL Datastore

Question 15

What are the ways for migrating data to Azure?

Answer 15

Azure Migrate - Service to perform data migration

Azure Data box - Physical migration service. Uses a proprietary Microsoft device

AZCopy - Command line tool for uploading data

Azure Storage Explorer - GUI front-end for AZCopy

Question 16

What are the types of databases Azure offers?

Answer 16

Azure SQL DB - Cloud based relational database

Azure SQL Managed Instance - PaaS instance of SQL database

Cosmos DB- Distributed cloud based database that supports multiple models (NoSQL, relational)

Question 17

Azure Data Factory

Answer 17

Cloud service for ETL (extract-transform-load) and ELT (extract-load-transform) processes.

Orchestrate processing of large amounts of data for determining business insights.

Question 18

Azure HDInsight

Answer 18

Managed open-source cloud service for big data analytics

Question 19

Azure Data Bricks

Answer 19

Analytics platform for building and training machine learning models and dashboards from big datasets

Question 20

Azure Synapse Analytics

Answer 20

Enterprise analytics and data warehouse service that combines Apache Spark technologies for big data, and Azure Data Explorer for log and time series analytics.