WGU D321 AWS DEVELOPER DVA C02
ACTUAL EXAM QUESTIONS AND
CORRECT ANSWERS
◉ Core Components of an EC2 Instance
Answer: 1. Amazon Machine Image (AMI)
2. Instance Types
3. Elastic Block Store (EBS) Volumes
4. Security Groups
5. Key Pair
◉ AMI (EC2 Core Component)
Answer: - Amazon Machine Image
- software blueprint for your instance - thousands to choose from
or custom create
◉ Instance Types (EC2 Core Component)
Answer: - hardware profiles of virtual server
- General purpose: t and m families: for web servers, small
databases
-Compute optimized: c family has high ratio of CPU power for
memory - ideal for batch processing, media transcoding, and
scientific modeling
,-Memory optimized: r family - high ratio of memory to CPU, used
for large databases and in-memory caches
◉ EBS Volumes (EC2 Core Component)
Answer: -Elastic Block Store
-block-level storage volume that can be attached to EC2 instance
-virtual hard drive for server
-persistent- data remains even afterEC2 instance is terminated
-detach a volume from one instance and attach to another
◉ Security Group (EC2 Core Component)
Answer: -acts as virtual firewall for EC2 instance
-customizable
◉ Key Pairs (EC2 Core Component)
Answer: -public and private key
-set of security credentials
-AWS has public key
◉ Features of EC2
Answer: -Functionality
-Operating Systems
-Software
-Reliability
,-Scalability
◉ AWS S3 Simple Storage Service
Answer: -stores files of different types like photo, audio and
videos as objects - provides more scalability and security
-allows users to store and retrieve any amount of data at any point
in time from anywhere on the web
◉ S3 Uses
Answer: -Good for: mobile/web applications, big data, machine
learning
-Data storage: best option for scaling both small and large storage
applications
-Backup and Recovery maintain data durability and availability
for recovery needs
-Hosting Static Websites: low latency and cost effective
-Data Archiving: service integration, low cost for long term data
storing
-Big Data Analytics: can store large amounts of structured and
unstructured data, offers integration with other AWS services
◉ S3 Glacier
Answer: -ultra-low cost storage service built for backups and long
term data archiving
-highly secure and durable
, -$1 per petabyte per month
-slower retrieval times
◉ Glacier Vaults
Answer: -virtual containers that are used to store data
-each vault has its specific access policies
-region-specific
◉ Glacier Archives
Answer: -fundamental entity type stored in vaults
◉ Main Applications for AWS Glacier
Answer: 1. Storing old data and meeting compliance rules
2. Disaster recovery and cybersecurity
3. Storing large media files
4. Research and big data storage
5. Business and legal records
6.Security and investigation storage
◉ Benefits of Glacier
Answer: 1. Lower cost
2. Upholds archive database
3. Durability
ACTUAL EXAM QUESTIONS AND
CORRECT ANSWERS
◉ Core Components of an EC2 Instance
Answer: 1. Amazon Machine Image (AMI)
2. Instance Types
3. Elastic Block Store (EBS) Volumes
4. Security Groups
5. Key Pair
◉ AMI (EC2 Core Component)
Answer: - Amazon Machine Image
- software blueprint for your instance - thousands to choose from
or custom create
◉ Instance Types (EC2 Core Component)
Answer: - hardware profiles of virtual server
- General purpose: t and m families: for web servers, small
databases
-Compute optimized: c family has high ratio of CPU power for
memory - ideal for batch processing, media transcoding, and
scientific modeling
,-Memory optimized: r family - high ratio of memory to CPU, used
for large databases and in-memory caches
◉ EBS Volumes (EC2 Core Component)
Answer: -Elastic Block Store
-block-level storage volume that can be attached to EC2 instance
-virtual hard drive for server
-persistent- data remains even afterEC2 instance is terminated
-detach a volume from one instance and attach to another
◉ Security Group (EC2 Core Component)
Answer: -acts as virtual firewall for EC2 instance
-customizable
◉ Key Pairs (EC2 Core Component)
Answer: -public and private key
-set of security credentials
-AWS has public key
◉ Features of EC2
Answer: -Functionality
-Operating Systems
-Software
-Reliability
,-Scalability
◉ AWS S3 Simple Storage Service
Answer: -stores files of different types like photo, audio and
videos as objects - provides more scalability and security
-allows users to store and retrieve any amount of data at any point
in time from anywhere on the web
◉ S3 Uses
Answer: -Good for: mobile/web applications, big data, machine
learning
-Data storage: best option for scaling both small and large storage
applications
-Backup and Recovery maintain data durability and availability
for recovery needs
-Hosting Static Websites: low latency and cost effective
-Data Archiving: service integration, low cost for long term data
storing
-Big Data Analytics: can store large amounts of structured and
unstructured data, offers integration with other AWS services
◉ S3 Glacier
Answer: -ultra-low cost storage service built for backups and long
term data archiving
-highly secure and durable
, -$1 per petabyte per month
-slower retrieval times
◉ Glacier Vaults
Answer: -virtual containers that are used to store data
-each vault has its specific access policies
-region-specific
◉ Glacier Archives
Answer: -fundamental entity type stored in vaults
◉ Main Applications for AWS Glacier
Answer: 1. Storing old data and meeting compliance rules
2. Disaster recovery and cybersecurity
3. Storing large media files
4. Research and big data storage
5. Business and legal records
6.Security and investigation storage
◉ Benefits of Glacier
Answer: 1. Lower cost
2. Upholds archive database
3. Durability
