WGU D321 AWS DEVELOPER EXAM
QUESTIONS AND FULLY CORRECT
ANSWERS (NEW UPDATED)
300 QUESTIONS AND ANSWERS
1. What is AWS? Amazon Web Services (AWS) is a comprehensive cloud
computing platform provided by Amazon that offers over 200 fully featured
services from data centers globally.
2. What are the main benefits of cloud computing? Cost savings, scalability,
reliability, security, global reach, and the ability to focus on core business rather
than infrastructure management.
3. What is the AWS Free Tier? A program that provides free access to AWS
services for 12 months after account creation, including specific usage limits for
various services.
4. What are the three main cloud computing models? Infrastructure as a
Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
5. What is the difference between horizontal and vertical scaling?
Horizontal scaling adds more instances/servers, while vertical scaling increases
the power (CPU, RAM) of existing instances.
6. What is an AWS Region? A physical location around the world where AWS
clusters data centers, each containing multiple Availability Zones.
7. What is an Availability Zone (AZ)? One or more discrete data centers with
redundant power, networking, and connectivity in an AWS Region.
8. What is an Edge Location? A site that CloudFront uses to cache copies of
content closer to users for faster delivery.
9. What is the AWS Well-Architected Framework? A set of best practices
across five pillars: Operational Excellence, Security, Reliability, Performance
Efficiency, and Cost Optimization.
,10. What is AWS CLI? Command Line Interface that allows you to interact
with AWS services using commands in your command-line shell.
11. What is AWS SDK? Software Development Kit that provides APIs and
libraries for various programming languages to interact with AWS services.
12. What is IAM? Identity and Access Management - a web service that helps
you securely control access to AWS resources.
13. What is an IAM User? An entity that represents a person or service that
interacts with AWS, with permanent long-term credentials.
14. What is an IAM Role? An AWS identity with permission policies that
determine what the identity can and cannot do in AWS, assumable by trusted
entities.
15. What is an IAM Policy? A document that defines permissions and can be
attached to users, groups, or roles to grant access to AWS resources.
16. What is the principle of least privilege? Granting only the minimum
permissions required to perform a task, reducing security risks.
17. What is MFA? Multi-Factor Authentication - an extra layer of security
requiring users to provide two or more verification factors.
18. What is AWS Organizations? A service that helps you centrally manage
and govern multiple AWS accounts.
19. What is CloudTrail? A service that enables governance, compliance, and
auditing by logging API calls made on your account.
20. What is CloudWatch? A monitoring and observability service that
provides data and actionable insights for AWS resources and applications.
21. What are CloudWatch Metrics? Data points that represent the
performance of your systems over time.
22. What are CloudWatch Alarms? Notifications triggered when metrics
reach specified thresholds.
23. What is CloudWatch Logs? A service to monitor, store, and access log
files from EC2 instances, CloudTrail, and other sources.
24. What is AWS Config? A service that tracks resource inventory and
configuration changes for compliance and security analysis.
, 25. What is the AWS Shared Responsibility Model? A security model where
AWS is responsible for security "of" the cloud, and customers are responsible
for security "in" the cloud.
26. What is encryption in transit? Protecting data while it moves between
locations, typically using TLS/SSL protocols.
27. What is encryption at rest? Protecting stored data using encryption keys to
make it unreadable without proper decryption.
28. What is AWS KMS? Key Management Service - a managed service that
creates and controls encryption keys used to encrypt data.
29. What is AWS Secrets Manager? A service that helps you protect secrets
needed to access applications, services, and IT resources.
30. What is AWS Systems Manager Parameter Store? A secure, hierarchical
storage for configuration data management and secrets management.
31. What is tagging in AWS? A way to assign metadata to AWS resources
using key-value pairs for organization and cost tracking.
32. What is AWS Resource Groups? A service that lets you organize AWS
resources that share common tags.
33. What is AWS Cost Explorer? A tool that enables you to view and analyze
your AWS costs and usage over time.
34. What is AWS Budgets? A service that allows you to set custom budgets
and receive alerts when costs or usage exceed thresholds.
35. What is AWS Trusted Advisor? A service that provides recommendations
to help you follow AWS best practices for cost optimization, security, and
performance.
36. What is AWS Support? A service offering different support plans (Basic,
Developer, Business, Enterprise) with varying levels of assistance.
37. What is AWS CloudFormation? A service that gives developers and
businesses an easy way to create AWS resources using templates.
38. What is Infrastructure as Code (IaC)? The practice of managing and
provisioning computing infrastructure through machine-readable definition
files.
QUESTIONS AND FULLY CORRECT
ANSWERS (NEW UPDATED)
300 QUESTIONS AND ANSWERS
1. What is AWS? Amazon Web Services (AWS) is a comprehensive cloud
computing platform provided by Amazon that offers over 200 fully featured
services from data centers globally.
2. What are the main benefits of cloud computing? Cost savings, scalability,
reliability, security, global reach, and the ability to focus on core business rather
than infrastructure management.
3. What is the AWS Free Tier? A program that provides free access to AWS
services for 12 months after account creation, including specific usage limits for
various services.
4. What are the three main cloud computing models? Infrastructure as a
Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
5. What is the difference between horizontal and vertical scaling?
Horizontal scaling adds more instances/servers, while vertical scaling increases
the power (CPU, RAM) of existing instances.
6. What is an AWS Region? A physical location around the world where AWS
clusters data centers, each containing multiple Availability Zones.
7. What is an Availability Zone (AZ)? One or more discrete data centers with
redundant power, networking, and connectivity in an AWS Region.
8. What is an Edge Location? A site that CloudFront uses to cache copies of
content closer to users for faster delivery.
9. What is the AWS Well-Architected Framework? A set of best practices
across five pillars: Operational Excellence, Security, Reliability, Performance
Efficiency, and Cost Optimization.
,10. What is AWS CLI? Command Line Interface that allows you to interact
with AWS services using commands in your command-line shell.
11. What is AWS SDK? Software Development Kit that provides APIs and
libraries for various programming languages to interact with AWS services.
12. What is IAM? Identity and Access Management - a web service that helps
you securely control access to AWS resources.
13. What is an IAM User? An entity that represents a person or service that
interacts with AWS, with permanent long-term credentials.
14. What is an IAM Role? An AWS identity with permission policies that
determine what the identity can and cannot do in AWS, assumable by trusted
entities.
15. What is an IAM Policy? A document that defines permissions and can be
attached to users, groups, or roles to grant access to AWS resources.
16. What is the principle of least privilege? Granting only the minimum
permissions required to perform a task, reducing security risks.
17. What is MFA? Multi-Factor Authentication - an extra layer of security
requiring users to provide two or more verification factors.
18. What is AWS Organizations? A service that helps you centrally manage
and govern multiple AWS accounts.
19. What is CloudTrail? A service that enables governance, compliance, and
auditing by logging API calls made on your account.
20. What is CloudWatch? A monitoring and observability service that
provides data and actionable insights for AWS resources and applications.
21. What are CloudWatch Metrics? Data points that represent the
performance of your systems over time.
22. What are CloudWatch Alarms? Notifications triggered when metrics
reach specified thresholds.
23. What is CloudWatch Logs? A service to monitor, store, and access log
files from EC2 instances, CloudTrail, and other sources.
24. What is AWS Config? A service that tracks resource inventory and
configuration changes for compliance and security analysis.
, 25. What is the AWS Shared Responsibility Model? A security model where
AWS is responsible for security "of" the cloud, and customers are responsible
for security "in" the cloud.
26. What is encryption in transit? Protecting data while it moves between
locations, typically using TLS/SSL protocols.
27. What is encryption at rest? Protecting stored data using encryption keys to
make it unreadable without proper decryption.
28. What is AWS KMS? Key Management Service - a managed service that
creates and controls encryption keys used to encrypt data.
29. What is AWS Secrets Manager? A service that helps you protect secrets
needed to access applications, services, and IT resources.
30. What is AWS Systems Manager Parameter Store? A secure, hierarchical
storage for configuration data management and secrets management.
31. What is tagging in AWS? A way to assign metadata to AWS resources
using key-value pairs for organization and cost tracking.
32. What is AWS Resource Groups? A service that lets you organize AWS
resources that share common tags.
33. What is AWS Cost Explorer? A tool that enables you to view and analyze
your AWS costs and usage over time.
34. What is AWS Budgets? A service that allows you to set custom budgets
and receive alerts when costs or usage exceed thresholds.
35. What is AWS Trusted Advisor? A service that provides recommendations
to help you follow AWS best practices for cost optimization, security, and
performance.
36. What is AWS Support? A service offering different support plans (Basic,
Developer, Business, Enterprise) with varying levels of assistance.
37. What is AWS CloudFormation? A service that gives developers and
businesses an easy way to create AWS resources using templates.
38. What is Infrastructure as Code (IaC)? The practice of managing and
provisioning computing infrastructure through machine-readable definition
files.
