AWS Elastic Cloud Compute (EC2) With correct solutions

EC2 correct answers Elastic Compute Cloud. Web service providing resizeable compute capacity in the cloud. Reduces the time required to obtain and boot the new server to mins. What are the EC2 pricing models? correct answers 1. On demand, 2. Reserved, 3. Spot What length are the new EC2 and EBS instance IDs? correct answers 17 characters (resource identifier-17 characters, e.g. "i-abcdef0") What is a reservation ID? correct answers Every instance launched by EC2 has a reservation ID. The ID has a one-to-one relationship with an instance launch request, but can be associated with more than one instance if you launch multiple instances using the same launch request. Are there any concerns about the new instance IDs and windows instances? correct answers Windows will automatically truncate the name to 15 characters to adhere to NetBIOS naming conventions. Due to this, you may see duplicate computer names at 15 characters. Recommend using a unique naming scheme to avoid complications. How many instances can I run in EC2? correct answers Limited to up to 20 On-Demand Instances, purchasing 20 Reserved Instances, and requesting Spot Instances per your dynamic Spot limit per region. If you need more instances, complete the Amazon EC2 instance request form with your use case and your instance increase will be considered. Limit increases are tied to the region they were requested for. What is an on demand instance? correct answers Pay for compute capacity by the hour with no long-term commitments. Good for users that want low cost w/out up-front payment or commitment. Good for short term or spikey work loads that cannot be interrupted. What is a reserved instance? correct answers Provides capacity reservation and offers significant discount on the hourly charge for an instance (up to 75% off). Three payment options: all upfront, partial upfront, no upfront. What are spot instances? correct answers Bid for unused EC2 capacity. Prices set by Amazon, fluctuate depending on the supply and demand for capacity. True or False. Spot instances are good for applications that must run at specific times. correct answers False. They are only good for applications that have flexible start and end times. The instances will be terminated by AWS if someone is willing to pay more for compute time. True or False. You will get the last hour of your Spot instance for free upon termination. correct answers False. You only get the last hour free if AWS terminates the instance. If you terminate it, you still have to pay for the time used.