The AWS Certified Solutions Architect – Associate (SAA-C03) exam tests your ability to design distributed systems on AWS. It is one of the most sought-after certifications in the cloud domain.
What happens when you enable versioning on an S3 bucket?
APrevious versions are automatically deleted.
BAll objects gain unique version IDs.
CVersioning cannot be suspended later.
DOnly new objects get versions.
Explanation
When versioning is enabled, all objects in the bucket receive unique version IDs, while options A and C are incorrect, and option D is misleading.
Q172
Which service allows you to distribute traffic globally?
AAWS Global Accelerator
BAmazon Route 53
CAWS Direct Connect
DAmazon CloudFront
Explanation
Amazon Route 53 handles global DNS and traffic routing, while other options focus on specific use cases or services.
Q173
A company needs to run code in response to specific database changes within DynamoDB. Which service should they use?
AAWS Lambda
BAmazon ECS
CAWS Batch
DAmazon EC2
Explanation
AWS Lambda can trigger functions based on DynamoDB Streams, while other options are not event-driven.
Q174
You are configuring an Amazon RDS instance with Multi-AZ. What happens during a failover?
ARead only access to data
BNo downtime until maintenance
CAutomatic DNS record update
DStop of all database services
Explanation
During failover, the DNS record is updated to redirect traffic to the standby, while others are incorrect regarding service behavior.
Q175
Which AWS service enables the creation of serverless applications?
AAWS Lambda
BAmazon EC2
CAmazon S3
DAWS RDS
Explanation
AWS Lambda allows execution without provisioning servers; EC2 requires server management, S3 is for storage, RDS is for databases.
Q176
A company needs to prevent public access to an S3 bucket but still allow access via a VPC endpoint. Which feature should they use?
ABucket Policy
BACL Settings
CPublic Access Block
DCORS Configuration
Explanation
Public Access Block settings prevent public access, while policies and ACLs are insufficient for this requirement.
Q177
You are configuring an Auto Scaling Group. What happens when the Number of Desired Instances is set to 0?
AInstances are terminated
BNo new instances are launched
CExisting instances are stopped
DScaling policies are ignored
Explanation
Setting Desired Instances to 0 triggers termination of all existing instances; other options misinterpret scaling behavior.
Q178
Which service can automatically distribute incoming application traffic?
AElastic Load Balancing
BAmazon CloudFront
CAWS Direct Connect
DAWS Shield
Explanation
Elastic Load Balancing distributes traffic across multiple targets, ensuring high availability, while the other services serve different roles.
Q179
A company needs to secure IAM user access by enforcing MFA. What should you do?
AEnable MFA for IAM users
BRestrict access to VPN only
CUse IAM roles exclusively
DAudit user access logs
Explanation
Enabling MFA requires users to provide additional authentication for account access, unlike the other options which do not enforce MFA.
Q180
What happens when an Amazon S3 object is deleted and versioning is enabled?
APermanent loss of the object
BObject is moved to trash
CDeletion marker is added
DAll versions are deleted
Explanation
When S3 versioning is enabled, a deletion marker is added, allowing previous versions to remain accessible, unlike the other options.