PRACTITIONER ESSENTIALS QUESTIONS AND ANSWERS
2024
1. AWS (Amazon Web Services): A cloud computing platform provided by
Amazon that offers a wide range of cloud services, including computing power, storage,
databases, and more.
2. Cloud Computing: The delivery of computing services over the internet, allowing
users to access and use resources (like servers or storage) without the need for physical
hardware.
3. Region: A geographical area where AWS data centers (Availability Zones) are
located. Each region is independent and isolated from others.
4. Availability Zone: A data center within an AWS region, designed for redundancy
and fault tolerance.
5. Elasticity: The ability to scale resources up or down based on demand, ensuring
efficient resource utilization.
6. Scalability: The ability to handle increased workload by adding resources or
adjusting capacity, usually achieved by horizontal scaling (adding more servers).
7. EC2 (Elastic Compute Cloud): AWS's virtual server service, allowing users to
create and manage virtual machines.
8. S3 (Simple Storage Service): AWS's object storage service for storing and
retrieving data, often used for backup, data archiving, and content distribution.
9. RDS (Relational Database Service): AWS's managed database service, which
simplifies the setup, operation, and scaling of relational databases.
10. IAM (Identity and Access Management): A service that allows you to control
access to AWS resources by creating and managing users, groups, and permissions.
11. VPC (Virtual Private Cloud): A logically isolated section of the AWS cloud
where you can launch AWS resources, including instances, databases, and more.
12. Load Balancer: A service that evenly distributes incoming network traffic across
multiple instances, ensuring high availability and fault tolerance.
13. EBS (Elastic Block Store): AWS's block storage service used to create and attach
storage volumes to EC2 instances.
14. Lambda: A serverless compute service that allows you to run code in response to
events without provisioning or managing servers.
15. SaaS (Software as a Service): A cloud computing model where software
applications are hosted and provided as a service over the internet.
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16. PaaS (Platform as a Service): A cloud computing model where a platform and
environment for developing, running, and managing applications is provided.
17. IaaS (Infrastructure as a Service): A cloud computing model where virtualized
computing resources (like servers and storage) are provided as a service over the internet.
18. TCO (Total Cost of Ownership): The total cost associated with owning and
operating an IT infrastructure, including hardware, software, maintenance, and more.
19. Compliance: Adherence to regulatory requirements and industry standards for
data security and privacy.
20. Billing and Cost Management: Monitoring and controlling costs associated with
AWS resources and services.
21. High Availability: A design approach that ensures systems or applications are
accessible and operational with minimal downtime.
22. Fault Tolerance: The ability of a system to continue functioning even in the
presence of hardware or software failures.
23. Backup: Creating copies of data to protect against data loss, typically stored in a
separate location or medium.
24. Snapshot: A point-in-time copy of data, often used for backup and recovery
purposes, especially in AWS EBS volumes.
25. Security Group: A virtual firewall for controlling inbound and outbound traffic to
AWS resources, such as EC2 instances.
26. CIDR (Classless Inter-Domain Routing): A method for representing IP
addresses and routing information in a more flexible and efficient way.
27. HTTPS (Hypertext Transfer Protocol Secure): A secure version of HTTP used
for encrypted communication over the internet, often indicated by "https://" in a web
address.
28. Encryption: The process of converting data into a secure, unreadable format to
protect it from unauthorized access.
29. DNS (Domain Name System): A system that translates human-readable domain
names (e.g., www.example.com) into IP addresses.
30. Latency: The time delay between sending and receiving data over a network, often
measured in milliseconds.
31. Data Transfer Acceleration: AWS service that speeds up transferring files to and
from Amazon S3 by using edge locations.
32. Auto Scaling: A service that automatically adjusts the number of EC2 instances to
handle changes in traffic or demand.
33. Monitoring: The process of observing and collecting data on the performance and
health of AWS resources and applications.
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