A three-tier web application, consisting of a web server, an application server, and a database, is deployed on Amazon EC2 instances. The company wants to decouple the web tier from the application tier to improve scalability and fault tolerance. Which AWS service should they use to achieve this?

• AWS Lambda
• Amazon Route 53
• Elastic Load Balancing (ELB)
• Amazon Simple Queue Service (SQS).

A company wants to understand and forecast its future AWS costs. Which AWS service should it use?

• AWS Cost Explorer.
• AWS Budgets
• AWS Trusted Advisor
• AWS Pricing Calculator

According to the AWS Shared Responsibility Model, which of the following is AWS responsible for?

• Configuring IAM policies correctly
• Updating guest operating systems on EC2 instances
• Patching the underlying hypervisor.
• Encrypting application data stored in Amazon S3

A startup wants to run its application in multiple AWS Regions to improve fault tolerance. Which component helps direct user traffic across Regions based on latency?

• Amazon Route 53.
• AWS Direct Connect
• Amazon CloudFront
• Elastic Load Balancing (ELB)

A company needs to store long-term backups that are rarely accessed but must remain immediately retrievable within minutes when required. Which Amazon S3 storage class is the MOST cost-effective choice?

• Amazon S3 Standard
• Amazon S3 Standard-Infrequent Access (S3 Standard-IA)
• Amazon S3 Glacier Instant Retrieval.
• Amazon S3 Glacier Deep Archive

A development team needs to run a batch processing job for 6 hours every night. The job can be interrupted and restarted without issue. Which AWS pricing model would be the MOST cost-effective for this use case?

• On-Demand Instances
• Reserved Instances (1-Year Term)
• Spot Instances.
• Dedicated Hosts

A startup is beginning to develop a new application on AWS and needs basic technical guidance on best practices during business hours. Their budget is limited. Which AWS Support plan is most appropriate for their needs?

• Basic Support
• Developer Support.
• Business Support
• Enterprise Support

A company needs to migrate an Oracle database to AWS. Their primary requirement is to minimize the amount of administration needed, such as patching the database software or managing backups. Which AWS service should they use?

• Amazon RDS for Oracle.
• Amazon EC2 with Oracle Database installed
• Amazon DynamoDB
• Amazon Redshift

Which AWS service provides a fully managed service for running Apache Kafka without managing the underlying infrastructure?

• Amazon SQS
• Amazon Kinesis Data Streams
• Amazon MSK
• AWS Step Functions

You need temporary access to an S3 bucket without creating IAM users.

• Store access keys in a .env file
• Make the bucket public
• Use an IAM role with STS temporary credentials
• Allow * in the bucket policy