Amazon Web Services (AWS) : EC2

1. Name the three basic types of Cloud Services? 
Answer: Cloud Services can be mainly classified into three types, namely,

• Storage
• Networking
• Computing

2. Explain the relation between availability region and zone?
Answer: The distinct geographical areas are referred to as availability regions. 

For example – Asia South (Chennai) and US West 1 ( North Washington). 

However, the sites included under these regions are called availability zones.

Usually, only isolated regions are included, capable of replicating themselves as per requirement. 

3. Name the types of queues in SQS? 
Answer: The two known types of queues in SQS are as follows 

• FIFO Queues
• Standard Queues

4. Name the various product categories available under AWS?
Answer: We can categorize the following as top products under AWS: 

• Analytics
• Identity
• Security
• Compliance
• Storage
• Database
• Machine learning 

5. Under AWS, mention the snow family members. 
Answer: The members of the snow family include

• AWS Snowmobile
• AWS Snowcone
• AWS Snowball6

6. Name the attacks which the AWS Shield can prevent?
Answer: The AWS shield safeguards the Amazon EC2 from the common infrastructure layer and the DDoS attacks like UDP reflection attacks, such as NTP reflection, DNS reflection, SSDP reflection, etc.

7. Name the cheapest AWS region?
Answer: The US standard falls among the cheapest AWS regions in the World.

8. What can be the maximum possible size of an S3 bucket?
Answer: 5TB is the maximum possible size of an S3 bucket. 

9. Name the available regions in AWS? 
Answer: The AWS services can be availed across 18 regions across South America, North America, Asia Pacific, and the EU. 

10. Name the most popular AWS services?
Answer : 

• Amazon Glacier
• Amazon SNS 
• Amazon Kinesis
• Amazon VPC
• Amazon CloudFront
• Amazon S3
• Amazon Lambda

11. Name the various Amazon EC2 instances? 
Answer: The various types of Amazon EC2 instances include 

• Accelerated Computing
• Compute-optimized Instances
• Memory-optimized
• Storage Optimized
• General-purpose Instances.

12. List down the benefits of AWS?
Answer: The benefits of AWS include

1. Users can avail of the services of AWS at a lower cost.
2. These services are user-friendly and easy to use
3. They also contain several advantages that users can easily rely upon. 

13. Can we say that Amazon S3 is a Global service?
Answer: Amazon S3 has a global e-commerce network run on scalable storage infrastructure and a web interface for object storage. Thus one can say that Amazon S3 is a global service.

14. Are all the Amazon services region-based?
Answer: Not all the services provided are region-based, but most of them are. 

15. Mention the uses of Amazon’s Lightsail’s Container Services?
Answer: The uses are as follows 

1. It helps running containerized applications in the Cloud
2. The container services help run applications directly from web apps to multi-tiered microservices.
3. The Amazon Lightsail takes care of the underlying infrastructure while running applications.

16. Explain the function of Amazon EC2 in Amazon Auto Scaling fleet management.
Answer: 

1. Firstly, it has the job of balancing capacity across various availability zones.
2. Secondly, the malfunctioning EC2 instances are replaced with new ones.
3. Lastly, the health of the running EC2 instances is monitored in the cloud infrastructure. 

17. Distinguish between RPO and RTO in AWS?
Answer: 

• RPO stands for Recovery Point Objective. It can be defined as the amount of time or data loss one can afford after a disaster in the service. It is generally measured in the sub-second range.
• RTO can be defined as the time taken as the recovery time after a disaster to return to regular operations. Generally measured in minutes, the RTO stands for Recovery Time Objective.

18. Describe how Amazon ElastiCache functions?
Answer: The Amazon ElastiCache functions as a message, cache, queue, database, etc., which majorly serves as a fast in-memory data store. Nevertheless, it also supports session stores, gaming leaderboards, real-time transactions, and Business intelligence tools. 

19. Describe the connection between Amazon RDS and Neptune?
Answer: The connectivity of Amazon RDS with Amazon Neptune stands in the shared technologies while managing security group management, instance lifestyle management, and encryption at rest with Amazon KMS keys. 

20. How is content delivery speeded up using content delivery?
Answer: A Global network infrastructure consisting of more than 300 Points of Presence (PoPs) speeds up content delivery. The required optimization of the content delivery is achieved through Websockets and edge termination. 

21. Name the tools and techniques the user can employ to identify whether you are paying the correct amount?
Answer:  The ways by which you can check whether you are paying the correct amount are by employing the following resources

• Cost explorer
• AWS budget
• Cost allocation Tags
• By checking the top table services

22. Other than Console, what are the tools by which you can log into the cloud environment?
Answer: The tools that can help you log into cloud applications are as follows

1. AWS SDK
2. AWS CLI for Linux
3. AWS CLI for Windows
4. Eclipse
5. Putty

23. Name the services which can minimize DDoS attacks?
Answer: The services capable of reducing DDoS attacks are 

1. Amazon CloudFront
2. ALL
3. VPC
4. AWS Shield
5. AWS WAF

24. What ways to set up a system for monitoring metrics in real-time in AWS?
Answer: The application status of various custom events and AWS services can be monitored using Amazon Cloudwatch

1. AWS API calls 
2. Auto-scaling lifecycle events 
3. Scheduled events
4. State changes in Amazon EC2 

25. Name the various types of Cloud services?
Answer: The different types of cloud services are

1. Data as a service
2. Platform as a service 
3. Software as a service 
4. Infrastructure as a service

26. Name some of the AMI Designs?
Answer: The most common types of AMIs are as follows 

1. Just enough Baked AMI
2. Hybrid AMI
3. Fully Baked AMI

27. Name some of the DB Engines the user can use in AWS RDS?
Answer: DB Engines capable of being used in the AWS RDS are 

1. MariaDB
2. OracleDB
3. PostgreDB
4. MS-SQL DB
5. MYSQL DB

28. Name the different pricing models for EC2?
Answer: The different pricing models for EC2 are 

1. Scheduled
2. Reserved
3. Spot 
4. Dedicated
5. on-demand

29. Name the types of Volumes for EC2 instances?
Answer: The volume for EC2 instances is of two types 

1. EBS- Elastic Block Stores
2. Instance store volumes

30. Define Cloud Watch.
Answer: A tool capable of monitoring different types of AWS services, such as application, health inspection, networking, etc., is called Cloudwatch.

31. What are the types in which Cloudwatch can be classified?
Answer: Cloudwatch can be classified into two types, namely,

1. Detailed Monitoring
2. Basic Monitoring

32. Define Glacier.
Answer: AN archiving or backup tool that helps in backing up data to S3 is referred to as Glacier.

33. Name the types of Routing policies in Route53.
Answer: The various types of Routing policies in Route53 are as follows 

1. Failover routing
2. Geolocation routing
3. Weighted routing
4. Multivalue answer 
5. Simple routing 
6. Latency routing

34. By Default, how many Elastic Ip Addresses does AWS offer?
Answer: By Default, Aws offer five elastic IP per region. 

35. Discuss the benefits of Cloud Computing?
Answer: The benefits of Cloud Computing are listed below

1. No IT maintenance 
2. Better performance
3. Device-independent
4. Lesser Computing Cost
5. Business connectivity

36. How can you access the AWS platform?
Answer: We can access the AWS platform in the following ways 

1. AWS SDK
2. AWS CLI
3. AWS Console.

37. Name the different types of storage classes in Amazon S3?
Answer: The types of storage classes available are 

1. Amazon S3 standard-infrequent Access
2. Amazon S3 Reduced Redundancy Storage 
3. Amazon Glacier
4. Amazon S3 standard

38. How can Amazon VPC be monitored?
Answer: Amazon VPC can be monitored in the following ways

1. VPC Flow Logs 
2. Cloud watch Logs and Cloud watch

39. List the essential features of Amazon Cloud?
Answer: The features of the Amazon Cloud includes 

1. Prefix searches 
2. Range searches 
3. Entire text search
4. Boolean searches 

40. Mention the year when the company officially launched amazon company EC2?
Answer: In 2006, the company announced the official launch of EC2. 

41. Name the types of Load Balancers in AWS?
Answer: The various types of Load Balancers in AWS are 

1. Network Load Balancer 
2. Classic Load Balancer 
3. Application Load Balancer

42. What maximum number of buckets can users create in S3?
Answer: The maximum number of buckets completed in S3 is 100.

43. What are the possible storage options available for EC2 instances?
Answer: The possible storage options available for EC2 instances are 

1. Amazon S3
2. Amazon Storage 
3. Amazon EBS 
4. Amazon EC2 instance store

44. Name some of the popular DevOps tools?
Answer: The famous well known DevOps tools are listed below 

1. Git – version control system tool
2. Selenium – Continuous Testing Tool
3. Docker – Containerization Tool
4. Chef, Puppet, Ansible – Deployment and Configuration Management tool
5. Jenkins – Continuous Integration Tool
6. Nagios – Continuous Monitoring Tool

45. What are the layers of Cloud Architecture in AWS?
Answer: In AWS, the layers of Cloud Architecture are 

1. Capacity Controller 
2. Group Controller 
3. Cloud regulator 
4. Hub Controller 

46. Name the types of AMIs provided by AWS?
Answer: The AMI types provided by AW2S are as follows

1. EBS upheld
2. Example Store Upheld

47. Name the AWS service that only exists for images and rudimentary cache data?
Answer: The AWS service that exists only to rudimentary cache data and images is AWS Edge locations. 

48. What is the maximum boot time taken for a store-backed AMI?
Answer: The maximum boot time for an Amazon occasion store-backed AMI Is 5 minutes.

49. What are the processes through which Amazon Route 3 provides low latency and high availability?
Answer: The Amazon Route 3 provides both HIgh availability and low latency, which can be seen through 

1. Reliance
2. Ideal Locations 
3. Universally Distributed Servers.

50. Name the various types of policies
Answer: The different types of policies are

1. Access Control List
2. Meeting policies
3. Consent limits
4. Asset-based policies

51. What is the maximum number of Elastic IPs a user can create in AWS?
Answer: The maximum number of Elastic IPs created per AWS account per area is 5.

52. Under which Cloud service, we can categorize Load Balancer and DNS service?
Answer: IAAS-stockpiling Cloud administration includes DNS and Load Balancer administrations.

53. What are the available volumes in EBS?
Answer: The available volume types in EBS are 

1. Provisioned IOPS
2. Cold HODD
3. Throughput optimized
4. Magnetic 
5. General-purpose

AWS Interview Questions and Answers For EC2

54. List some connection issues that can be faced while connecting to an EC2 instance?
Answer: The connection issues which you might face while connecting to the EC2 instance are 

1. Host key missing
2. Connection timeout 
3. User key unrecognized
4. Server refusing key

55. What are the methods for encrypting data in S3?
Answer: The methods for encrypting data in S3 includes 

1. C(Client-side)
2. S3(AES 256 encryption)
3. KMS(Key management service).

56. Define SNS.
Answer: A web service of the AWS which notifies the user of any activity in the Cloud that requires attention as per the user’s desire in the form of messages or emails is referred to as SNS or Simple Notification Service.

57. List the various types of Storage gateways.
Answer:  The types of storage gateways are as follows

1. Volume gateway
2. File gateway
3. Tape gateway

58. Suggest some types of backups in the RDS database.
Answer: The possible backups in the available database are as follows 

1. Manual
2. Automated

59. List the types of Virtualization in AWS?
Answer: Types of Virtualization in AWS are listed below as 

1. Paravirtualization
2. Hardware-assisted virtualization.

60. Explain the importance of buffers in AWS?
Answer: The role of a buffer is to synchronize and integrate various components in AWS. It links multiple apparatus delivering quick services at a uniform rate, thus maintaining equilibrium.

61. Define policies.
Answer: The permissions attached to the Created AWS users to access their accounts are referred to as policies.

62. Name the cloud watch merits available for EC2 instances?
Answer: In general, the cloud watch metrics available are 

1. CPU credit balance
2. CPU utilization
3. CPU credit balance
4. Disk writes
5. Disk reads
6. Networking 
7. Network out