How are Spot Instance, On-demand Instance, and Reserved Instance different from one another?
Both Spot Instance and On-demand Instance are models for pricing.
| Spot Instance | On-demand Instance |
| With Spot Instance, customers can purchase compute capacity with no upfront commitment at all. | With On-demand Instance, users can launch instances at any time based on the demand. |
| Spot Instances are spare Amazon instances that you can bid for. | On-demand Instances are suitable for the high-availability needs of applications. |
| When the bidding price exceeds the spot price, the instance is automatically launched, and the spot price fluctuates based on supply and demand for instances. | On-demand Instances are launched by users only with the pay-as-you-go model. |
| When the bidding price is less than the spot price, the instance is immediately taken away by Amazon. | On-demand Instances will remain persistent without any automatic termination from Amazon. |
| Spot Instances are charged on an hourly basis. | On-demand Instances are charged on a per-second basis |
2 What do you understand by ‘changing’ in Amazon EC2?
To make limit administration easier for customers, Amazon EC2 now offers the option to switch from the current instance count-based limitations to the new vCPU Based restrictions. As a result, when launching a combination of instance types based on demand, utilization is measured in terms of the number of vCPUs.
2 If you are running your DB instance as Multi-AZ deployment, can you use standby DB instances along with your primary DB instance?
No, the standby DB instance cannot be used along with the primary DB instances since the standby DB instances are supposed to be used only if the primary instance goes down.
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4 If in CloudFront the content is not present at an edge location, what will happen when a request is made for that content?
CloudFront will deliver the content directly from the origin server. It will also store the content in the cache of the edge location where the content was missing.
1 This cross-platform video game development engine that supports PC, Xbox, Playstation, iOS, and Android platforms allows developers to build and host their games on Amazon’s servers.
4 What are the common types of AMI designs?
There are many types of AMIs, but some of the common AMIs are:
6 Explain what T2 instances are?
The T2 Instances are intended to give the ability to burst to a higher performance whenever the workload demands it and also provide a moderate baseline performance to the CPU.
The T2 instances are General Purpose instance types and are low in cost as well. They are usually used wherever workloads do not consistently or often use the CPU.Â
AWS Interview Questions for Route 53
Amazon Route 53 is a scalable and highly available Domain Name System (DNS). The name refers to TCP or UDP port 53, where DNS server requests are addressed.
AWS Interview Questions – Short Answer QuestionsÂ
What are the different AWS IAM categories that you can control?
Using AWS IAM, you can do the following: