Top Answers to AWS Interview Questions
Amazon AWS comes under the top 15 certifications that individuals enroll in. It is also among the most popular and high-paying IT jobs in the world. Most professionals are also looking to upskill themselves in this field since major companies have either already transferred their data to the cloud or they are on the verge of doing so. In this blog on Amazon AWS Interview Questions and answers, our aim is to cover all the significant interview questions that are generally asked in the field of the cloud, Amazon AWS, and other related technologies:
We have categorized the Top Amazon AWS cloud interview questions into the following three parts: 1. Basic
1 Explain storage for Amazon EC2 instances.
Amazon EC2 provides four options for data storage depending upon its performance and durability.1. Amazon EBS – data storage volume is independent of the running life of the instance. It’s just like accessing an external hard disk drive on the cloud.2. Amazon EC2 Instance store – Storage volume that is attached to the host computer. The data on the instance store is available only till the life of the instance and if you terminate it, the data is lost forever.3. Amazon S3 – the most reliable and inexpensive option for accessing and modifying data from anywhere anytime.4. Adding storage – Evert time we launch an instance a root storage device is created for that instance.
2 What are the consistency models for modern DBs offered by AWS?
Eventual Consistency – It means that the data will be consistent eventually, but may not be immediate. This will serve the client requests faster, but chances are that some of the initial read requests may read the stale data. This type of consistency is preferred in systems where data need not be real-time. For example, if you don’t see the recent tweets on Twitter or recent posts on Facebook for a couple of seconds, it is acceptable.
Strong Consistency – It provides an immediate consistency where the data will be consistent across all the DB Servers immediately. Accordingly. This model may take some time to make the data consistent and subsequently start serving the requests again. However, in this model, it is guaranteed that all the responses will always have consistent data.
2 What is an Instance Store Volume and an EBS Volume?
An Instance Store Volume is temporary storage that is used to store the temporary data required by an instance to function. The data is available as long as the instance is running. As soon as the instance is turned off, the Instance Store Volume gets removed and the data gets deleted.
On the other hand, an EBS Volume represents a persistent storage disk. The data stored in an EBS Volume will be available even after the instance is turned off.
AWS Scenario Based Questions
Create an AMI of the server running in the North Virginia region. Once the AMI is created, The administrator would need the 12 digit account number of the #2 AWS account. This is required for copying the AMI which we have created.
Once the AMI is successfully copied into the Mumbai region, you can launch the instance using copied AMI in the Mumbai region. Once the instance is running and if it’s completely operational, the server in the North Virginia region could be terminated. This is the best way to migrate a server to a different account without any hassle.