AWS EC2 Interview Questions Flashcards
This section has been designed to contribute some important AWS interview questions based on EC2 instance. This section comprises the important part of the blog best AWS interview questions and answers. Mentioned below are 7 most common AWS Interview Questions based on EC2.
Define Amazon EC2.
This is one of the most basic and frequently asked EC2 based Amazon AWS interview questions and can be explained in very simple terms.
Amazon EC2 service is the acronym for Amazon Elastic Compute Cloud which has been designed to provide its customers with resizable and scalable computing capacity when they are using the cloud. Using the service of Amazon EC2, a client is able to launch as many virtual servers as he wants. In each of these virtual servers, the client is able to manage storage as well as configure security as and when needed. The main advantage of using Amazon EC2 is its ability to get everything done with minimal friction at all times.
List out all the best security practices for AWS EC2.
As a client who is using the service of Amazon EC2, there are some security best practices that needs to be followed at all times. The same is as outlined below.
- Use the AWS identity and access management to control and limit access to all your AWS resources at all times.
- You should only allow trusted networks and hosts to have access to all ports to the instance.
- Regularly review all the groups on your security schedule regularly.
- Only allow permission to the ports that are utmost required.
- One of the most important security measures that need to be taken is to disable the password-based login, as this is often the point of most security compromise.
Explain Stopping, Starting, and Terminating an Amazon EC2 instance.
Stopping and Starting an instance are the most common commands used on the Amazon EC2 platform. Questions based on these commands are considered one of the best AWS interview questions. Mentioned below is the explanation of the commands.
Once the command for stopping an instance is issued, the instance first performs a normal shutdown and then transitions itself to a stopped state. All the Amazon EBS volumes remained attached as they were, and you can resume the instance at a later stage. One of the main advantages of this feature is that Amazon doesn’t charge you additionally for the hours while the instance was in a stopped state.
When you issue the termination command to an instance, the instance first performs a normal shutdown and then moves ahead with detaching the existing Amazon EBS volumes. This can only be achieved if the deleteOnTermination attribute is set to false in the Amazon EBS settings. Once terminated, the client cannot resume the instance at a later stage.
Can S3 be cast-off with EC2 Instances, If yes specify how?
Yes, it is possible to cast off with EC2 instances by using root approaches which have the backup of native occurrence storage. When a developer or a client is using Amazon S3 services, they have the capability to use extremely scalable and additionally fast, dependable, low priced data storage structures that are used by Amazon itself to track the worldwide network of its own websites.
However, in order to perform these operations in the Amazon EC2 atmosphere, developers need to use certain tools in order to load their Amazon Machine Images (AMIs) into Amazon S3 and then transfer them back to Amazon EC2. The additional use of this method might be when developers need to load stationary content into S3 from their websites hosted on Amazon EC2.
Define regions and availability zones in Amazon EC2.
Being such a mammoth in the industry, it is common knowledge that Amazon EC2 will be hosted in multiple locations across the world. These worldwide locations are categorized in terms of availability zones as well as regions.
Each of these regions is completely independent of the other and each availability zone is isolated as well. But all the availability zones in a particular region are interconnected through multiple low latency links.
What is Amazon EC2 Root Device Volume?
When you as a developer launch an instance, the root device volume has the image that was used to boot up the instance in the first place.
There are two types of AMIs or Amazon Machine Images that are available:
EBS based storage, and
Instance store-backed AMI
https://www.whizlabs.com/blog/wp-content/uploads/2019/01/region-and-availability-zones.png
Are you aware of Security Group in Amazon EC2? Tell something about it.
Security groups in Amazon EC2 are one of the ways through which the security of the cloud network is protected. They act as a firewall and are used for controlling both the inbound as well as outbound traffic at the level of the instance.
Which of the following is a method for bidding on unused EC2 capacity based on the current spot price?
Spot Instance is the best method for bidding on unused EC2 capacity since this feature requires an affordable low price and the availability of the system varies depending on the availability of excess capacity.
Is this statement wrong, why?
“The standard instances are not suitable for standard server applications”
Yes, the statement is wrong because the standard instances are deemed suitable only for standard server applications.
Which instance has an hourly rate with no long-term commitment?
On-Demand Instance has an hourly rate with no long-term commitment because the pricing of this feature varies with the pricing model, instance as well as zone.
