What is Amazon EMR and when should it be used?

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AWS Interview Questions

  1. [JUNIOR] What is Amazon Web Services (AWS) and what are its key services?
  2. [JUNIOR] What is Amazon EC2 and what are its key features?
  3. [JUNIOR] What is Amazon S3 and what guarantees does it provide for durability and availability?
  4. [JUNIOR] What is a Virtual Private Cloud (VPC) and what are its core components?
  5. [JUNIOR] What is AWS Identity and Access Management (IAM) and why is it important?
  6. [JUNIOR] What is the difference between an AWS Region and an Availability Zone?
  7. [JUNIOR] What is AWS Lambda and how does it differ from EC2?
  8. [MID] How do Security Groups and Network ACLs differ in a VPC?
  9. [SENIOR] How would you design a highly available and fault-tolerant architecture for a web application on AWS?
  10. [JUNIOR] What is the AWS Shared Responsibility Model?
  11. [MID] What are the differences between S3, EBS, and EFS storage services?
  12. [MID] What is an Elastic Load Balancer (ELB) and what are the different types?
  13. [MID] How does Auto Scaling work in AWS and what components are needed to configure it?
  14. [MID] What is the difference between RDS Read Replicas and Multi-AZ deployments?
  15. [SENIOR] What is the AWS Well-Architected Framework and what are its pillars?
  16. [JUNIOR] What is the purpose of Amazon CloudWatch?
  17. [JUNIOR] What is Amazon CloudFront and how does it work?
  18. [JUNIOR] What is Amazon DynamoDB and what are its primary use cases?
  19. [JUNIOR] What is Amazon RDS and what database engines does it support?
  20. [JUNIOR] What is the difference between stopping and terminating an EC2 instance?
  21. [MID] When would you choose Amazon RDS over DynamoDB?
  22. [MID] What is Infrastructure as Code (IaC) and what is the role of AWS CloudFormation?
  23. [MID] What are the different S3 Storage Classes and what is S3 Intelligent-Tiering?
  24. [MID] What is the difference between public and private subnets in a VPC?
  25. [MID] How can you secure an S3 bucket?
  26. [MID] How can you secure an EC2 instance?
  27. [MID] What is the purpose of IAM Roles and how do they differ from IAM Users?
  28. [SENIOR] How does AWS Key Management Service (KMS) work and what is envelope encryption?
  29. [SENIOR] What is a cold start in AWS Lambda and what strategies can mitigate it?
  30. [SENIOR] How would you design a CI/CD pipeline for a containerized application on AWS?
  31. [SENIOR] How would you implement disaster recovery in AWS?
  32. [SENIOR] When would you choose ECS over EKS for container orchestration on AWS?
  33. [SENIOR] How would you design a serverless API backend on AWS?
  34. [SENIOR] How would you optimize AWS costs without sacrificing performance or reliability?
  35. [SENIOR] How can you secure data at rest and in transit in AWS?
  36. [SENIOR] What are the trade-offs between VPC Peering and AWS Transit Gateway for connecting multiple VPCs?
  37. [JUNIOR] What is an Amazon Machine Image (AMI) and how is it used?
  38. [JUNIOR] What is Amazon Route 53 and what is it used for?
  39. [MID] What is the difference between a NAT Instance and a NAT Gateway?
  40. [MID] What is the difference between instance store and EBS volumes?
  41. [MID] How does Amazon S3 versioning work and why is it useful?
  42. [MID] What are S3 pre-signed URLs and how are they used?
  43. [MID] What is the purpose of S3 Lifecycle Policies and how do they work?
  44. [MID] What is Amazon ElastiCache and how does it improve application performance?
  45. [MID] What is a blue-green deployment in AWS and how is it implemented?
  46. [MID] What is Amazon Aurora and how does it differ from other RDS engines?
  47. [SENIOR] How does AWS Organizations help manage multiple accounts at scale?
  48. [SENIOR] How would you architect a cost-effective data pipeline for processing terabytes of data daily on AWS?
  49. [SENIOR] How would you design a logging and monitoring solution for distributed microservices on AWS?
  50. [SENIOR] How would you provide an EC2 instance in a private subnet with secure internet access for software updates?
  51. [EXPERT] How would you respond to IAM access keys being accidentally committed to a public repository?
  52. [EXPERT] How would you diagnose intermittent 502 Bad Gateway errors on an ALB-backed Auto Scaling application under high traffic?
  53. [JUNIOR] What is the difference between an Elastic IP and a Public IP address?
  54. [JUNIOR] What is Elastic Beanstalk and when would you use it?
  55. [JUNIOR] What is Amazon SNS and what are its use cases?
  56. [MID] What are the different types of EBS volumes and when would you use each?
  57. [MID] How do VPC route tables work?
  58. [MID] What is the purpose of VPC Flow Logs?
  59. [MID] What is the difference between a Reserved Instance and a Savings Plan?
  60. [MID] How does Amazon Redshift support data warehousing?
  61. [MID] What is AWS Direct Connect and how does it work?
  62. [MID] How do database snapshots and automated backups work in Amazon RDS?
  63. [SENIOR] What is AWS Lambda@Edge and how does it differ from standard Lambda?
  64. [SENIOR] What are EC2 Placement Groups and when would you use each type?
  65. [SENIOR] What is cross-region replication in S3 and when would you use it?
  66. [SENIOR] What are DynamoDB Global Tables and when would you use them?
  67. [SENIOR] How does Amazon Athena work and what are its ideal use cases?
  68. [SENIOR] What is AWS Trusted Advisor and how does it help optimize your AWS environment?
  69. [SENIOR] How do you troubleshoot latency issues in an AWS VPC?
  70. [EXPERT] How would you migrate a large on-premises database to AWS with minimal downtime?
  71. [EXPERT] How would you design a scalable network architecture for an enterprise with dozens of VPCs across multiple accounts and on-premises connectivity?
  72. [EXPERT] How would you design a disaster recovery strategy with an RTO of 15 minutes and an RPO of 1 minute for a single-region application?
  73. [EXPERT] A Lambda function within a VPC is intermittently timing out when accessing an RDS database via API Gateway. How would you troubleshoot this?
  74. [EXPERT] Your company's monthly AWS bill has unexpectedly doubled. How would you systematically identify the root cause?
  75. [JUNIOR] What are the different types of storage available in AWS?
  76. [MID] What are the different EC2 pricing models and when would you use each?
  77. [MID] How does Amazon SQS work and how does it differ from Amazon SNS?
  78. [MID] What is Amazon DocumentDB and when would you use it?
  79. [SENIOR] What is the purpose of S3 Object Lock and MFA Delete?
  80. [SENIOR] How do DynamoDB Streams work and what are their use cases?
  81. [SENIOR] What is Amazon EMR and when should it be used?
  82. [SENIOR] What is Amazon S3 Transfer Acceleration and when would you use it?
  83. [EXPERT] How would you design a system to ingest and process a real-time stream of IoT data from thousands of sensors for analytics?
  84. [EXPERT] How would you design a zero-trust networking environment on AWS for microservices running on EKS?
  85. [JUNIOR] What is the AWS Free Tier and what does it include?
  86. [SENIOR] What is the purpose of S3 Access Points?
  87. [SENIOR] What is Amazon Neptune and what use cases is it suited for?
  88. [EXPERT] How would you design a globally distributed, fault-tolerant photo-sharing application on AWS?