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 Q31. What is the use case for "Reserved" EC2 plan ?Amazon Web Services (AWS)
Ans. If the usage is continuous , stable and predictable.

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 Q32. What is the use case for "Dedicated Host" EC2 plan ?Amazon Web Services (AWS)
Ans. If there are regulatory requirements, or proprietary license to be used.

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 Q33. Which EC2 instance type should be used if the application is memory intensive ?Amazon Web Services (AWS)
Ans. R4

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 Q34. Which is the cheapest EC2 instance type ?Amazon Web Services (AWS)
Ans. T

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 Q35. What are the different EC2 instance types ?Amazon Web Services (AWS)
Ans. F,I,G,H,T,D,R,M,C,P,X

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 Q36. Which is the most common EC2 instance Type ? Amazon Web Services (AWS)
Ans. T and M

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 Q37. Can we change the instance Type while it's running ?Amazon Web Services (AWS)
Ans. No

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 Q38. Does attached EBS volume get deleted if we terminate EC2 instance ?Amazon Web Services (AWS)
Ans. By default, Root volume gets terminated whereas additional volume doesn't.

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 Q39. Difference between EC2 instance public and private key ?Amazon Web Services (AWS)
Ans. public key is used for locking whereas private key is used for unlocking. public key can be used for locking multiple instances and hence can be shared.

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 Q40. Can we protect EC2 instances from terminating accidentally ?Amazon Web Services (AWS)
Ans. Yes

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 Q41. What is the difference between EC2 System status check and Instance status check ?Amazon Web Services (AWS)
Ans. System status check is to check if the power or network is working whereas Instance status check goes further and make sure that traffic is going through.

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 Q42. Which AWS service can be used to monitor EC2 ?Amazon Web Services (AWS)
Ans. CloudWatch

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 Q43. Can we have EC2 and EBS in different availability zones or regions ?Amazon Web Services (AWS)
Ans. No, they need to be local

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 Q44. Can we modify volume while attached EC2 is running ?Amazon Web Services (AWS)
Ans. Yes, except Magnetic standard

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 Q45. Are you using Auto Scaling for your EC2 instances ? How have you configured Auto scaling policy ?Amazon Web Services (AWS)
Ans. yes, you can create auto scaling policy to set max and min no of instance.

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 Q46. Can we associate a single EBS volume with multiple EC2 instances ?Amazon Web Services (AWS)
Ans. No

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 Q47. Can we attach single volume to multiple Ec2 instances ?Amazon Web Services (AWS)
Ans. Yes EFS volumes but not EBS

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 Q48. What is the use case of AWS Placement Group ?Amazon Web Services (AWS)
Ans. Computing that would require high network throughput and low latency within a single availability zone.

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 Q49. Can you explain what are NAT instances and what are they used for ?Amazon Web Services (AWS)
Ans. If instances in private subnet need to access internet without exposing the IP address to outside world , we use Nat gateway or nat instance. So there is a direct outbound traffic but not direct inbound traffic.

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 Q50. Difference between EC2 and S3 ?Amazon Web Services (AWS)
Ans. Ec2 is a computing service whereas S3 is a object based storage.

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 Q51. What is the limit for Ec2 SSH sessions ?Amazon Web Services (AWS)
Ans. Max sessions limit is defined in sshd_config. Default is set to 10 but can be overridden.

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 Q52. What is life cycle of cloud deployment process ?Cloud Computing
 This question was recently asked at 'Barclays'.This question is still unanswered. Can you please provide an answer.


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 Q53. What are the types of clouds in cloud computing ?Cloud Computing
Ans. Private, Public, Hybrid, Community

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 Q54. How does cloud computing helps saves cost ?Cloud Computing
Ans. Cloud computing helps saving overall cost for infrastructure and service usage through following -

1. On demand Services and elasticity - You only pay for what you use. Less Ideal time.

2. Resource Pooling

3. Self Service - Less involvement of human resources

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 Q55. How Resource Pooling helps saving cost ?Cloud Computing
Ans. With resource pooling and Pay as per use , Bigger companies like Google and Amazon can buy Large physical hardware and employ economy of scale and hence resulting in cost saving for customers.

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 Q56. How On demand Self Service helps saving cost ?Cloud Computing
Ans. On Demand service restricts cost by paying only for the use and Self Service saves cost by reducing intermediary human resource cost.

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 Q57. How would you secure resources in Cloud ?Cloud Computing
Ans. There are multiple types of security GCP provides to every customer. Data, Network, Compute, and Services. Each service have its own security layer and Google provides clients to build as per the GCP best practices like building VPC, IAM, Firewall rules and so on

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