DAY 24 : [Part 4] 🔍 Demystifying AWS: Key Questions and Answers

61. Which AWS service provides automatic scaling for EC2 instances?

a) AWS Auto Scaling
b) Amazon CloudWatch
c) AWS Elastic Beanstalk
d) Amazon ECS
Answer: a) AWS Auto Scaling
Explanation: AWS Auto Scaling adjusts the number of EC2 instances based on demand to maintain performance and optimize costs.

62. What is a key benefit of Amazon S3 versioning?

a) Automatic cost optimization
b) Real-time streaming
c) Protection against accidental data deletion
d) Automated database backup
Answer: c) Protection against accidental data deletion
Explanation: S3 versioning allows recovery of accidentally deleted or overwritten objects by maintaining multiple versions.

63. Which AWS service allows you to run containerized applications?

a) Amazon Redshift
b) AWS Lambda
c) Amazon ECS
d) AWS CloudFormation
Answer: c) Amazon ECS
Explanation: Amazon Elastic Container Service (ECS) is a fully managed container orchestration service.

64. What type of database is Amazon DynamoDB?

a) Relational database
b) NoSQL database
c) Data warehouse
d) Graph database
Answer: b) NoSQL database
Explanation: DynamoDB is a serverless, key-value, and document database designed for high scalability.

65. Which AWS service can distribute incoming application traffic across multiple targets?

a) Amazon VPC
b) AWS Elastic Load Balancing
c) AWS CloudTrail
d) Amazon Route 53
Answer: b) AWS Elastic Load Balancing
Explanation: ELB distributes traffic across multiple targets, such as EC2 instances or containers, to improve availability.

66. What is AWS Trusted Advisor used for?

a) Monitoring application performance
b) Providing real-time security and cost optimization recommendations
c) Encrypting data at rest
d) Deploying machine learning models
Answer: b) Providing real-time security and cost optimization recommendations
Explanation: Trusted Advisor analyzes AWS accounts and provides insights to optimize security, performance, and costs.

67. Which AWS service provides a fully managed relational database?

a) Amazon DynamoDB
b) Amazon Aurora
c) Amazon EC2
d) Amazon CloudFront
Answer: b) Amazon Aurora
Explanation: Aurora is a fully managed relational database compatible with MySQL and PostgreSQL.

68. What does the AWS Free Tier allow?

a) Unlimited use of all AWS services
b) Certain free usage limits for specific services
c) Access to AWS premium support for free
d) Free perpetual usage of EC2 instances
Answer: b) Certain free usage limits for specific services
Explanation: The Free Tier provides limited usage of services for free, useful for learning and testing.

69. Which feature does Amazon EC2 offer to improve fault tolerance?

a) Auto-healing containers
b) Placement Groups
c) Elastic IP addresses
d) Multi-AZ deployment
Answer: b) Placement Groups
Explanation: Placement Groups help optimize the performance of EC2 instances and improve fault tolerance.

70. What is the main purpose of Amazon CloudFront?

a) Cloud storage
b) Content delivery
c) Database hosting
d) Backup and restore
Answer: b) Content delivery
Explanation: CloudFront is a CDN service that delivers content with low latency and high transfer speeds.

71. Which of the following supports database caching?

a) Amazon Redshift
b) Amazon DynamoDB
c) Amazon ElastiCache
d) AWS Lambda
Answer: c) Amazon ElastiCache
Explanation: ElastiCache is a caching service for improving database and application performance.

72. Which AWS service helps automate the building, testing, and deploying of applications?

a) AWS CodePipeline
b) AWS CodeDeploy
c) AWS Lambda
d) AWS Glue
Answer: a) AWS CodePipeline
Explanation: CodePipeline automates the CI/CD process for faster application delivery.

73. What is the purpose of an Amazon RDS read replica?

a) Improve write performance
b) Enhance data backup
c) Increase read scalability
d) Provide disaster recovery
Answer: c) Increase read scalability
Explanation: Read replicas offload read traffic from the primary database to improve performance.

74. Which AWS service manages software packages for containerized applications?

a) AWS Batch
b) Amazon EKS
c) AWS Fargate
d) Amazon ECR
Answer: d) Amazon ECR
Explanation: Elastic Container Registry (ECR) stores, manages, and deploys Docker container images.

75. Which service is used to create private, secure connections to AWS resources?

a) AWS VPN
b) AWS Direct Connect
c) Amazon VPC
d) AWS Shield
Answer: b) AWS Direct Connect
Explanation: Direct Connect establishes dedicated network connections to AWS for better security and performance.

76. What does AWS Artifact provide?

a) Application deployment tools
b) Security and compliance documents
c) Cost management insights
d) CI/CD pipeline configuration
Answer: b) Security and compliance documents
Explanation: Artifact gives access to compliance reports and agreements to support customer audits.

77. Which AWS service provides cost visibility and insights?

a) AWS Budgets
b) AWS Cost Explorer
c) AWS Trusted Advisor
d) AWS CloudWatch
Answer: b) AWS Cost Explorer
Explanation: Cost Explorer helps visualize and analyze your AWS spending patterns.

78. What is the function of AWS IAM roles?

a) Store user passwords
b) Define permissions for AWS services to act on behalf of resources
c) Track usage of AWS resources
d) Encrypt S3 bucket contents
Answer: b) Define permissions for AWS services to act on behalf of resources
Explanation: IAM roles allow services or applications to access AWS resources securely.

79. Which AWS tool helps forecast future spending?

a) AWS Billing Dashboard
b) AWS Budgets
c) AWS Cost Explorer
d) AWS CloudWatch
Answer: b) AWS Budgets
Explanation: AWS Budgets helps predict and monitor future AWS usage and costs.

80. Which AWS service enables secure, scalable message queuing?

a) Amazon SQS
b) Amazon SNS
c) Amazon Kinesis
d) AWS Step Functions
Answer: a) Amazon SQS
Explanation: Simple Queue Service (SQS) allows decoupled communication between distributed systems.

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