Amazon EC2 Flashcards

1
Q

Q: What is Amazon EC2?

A

A: Amazon Elastic Compute Cloud (EC2) provides scalable virtual servers in the cloud.

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2
Q

Q: What are the main features of EC2?

A

A: Elasticity, various instance types, multiple pricing options, customizable configurations, and integrations with other AWS services.

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3
Q

Q: What are the categories of EC2 instance types?

A

A: General purpose, Compute optimized, Memory optimized, Storage optimized, and Accelerated computing.

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4
Q

Q: What are the EC2 pricing models?

A

A: On-Demand, Reserved Instances, Spot Instances, Savings Plans, and Dedicated Hosts.

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5
Q

Q: What are On-Demand Instances?

A

A: Instances paid for by the second, with no long-term commitment or upfront payment.

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6
Q

Q: What are Reserved Instances?

A

A: Instances purchased for a 1- or 3-year term with significant cost savings compared to On-Demand.

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7
Q

Q: What are Spot Instances?

A

A: Instances available at a discount, suitable for workloads that can tolerate interruptions.

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8
Q

Q: What are Dedicated Hosts?

A

A: Physical servers dedicated to a single customer for regulatory or licensing requirements.

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9
Q

Q: What are the main states in the EC2 instance lifecycle?

A

A: Pending, Running, Stopping, Stopped, Shutting-Down, and Terminated.

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10
Q

Q: What is a security group in EC2?

A

A: A virtual firewall that controls inbound and outbound traffic for EC2 instances.

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11
Q

Q: What are key pairs in EC2?

A

A: Cryptographic pairs used to securely connect to EC2 instances.

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12
Q

Q: What is Amazon EBS?

A

A: Block storage volumes attached to EC2 instances for persistent storage.

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13
Q

Q: What is an Amazon Machine Image (AMI)?

A

A: A template with an operating system, application server, and applications for launching instances.

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14
Q

Q: What is an Elastic IP address?

A

A: A static IPv4 address designed for dynamic cloud computing, allowing reassignment between instances.

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15
Q

Q: What is an Instance Store in EC2?

A

A: Temporary block storage that is physically attached to the host and lost when the instance stops or terminates.

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16
Q

Q: What is EC2 Auto Scaling?

A

A: A feature that automatically adjusts the number of EC2 instances to maintain performance and reduce costs.

17
Q

Q: What is Elastic Load Balancing in EC2?

A

A: A service that distributes incoming traffic across multiple EC2 instances to improve fault tolerance and scalability.

18
Q

Q: What is instance metadata in EC2?

A

A: Data about the instance, such as its ID, IP address, and region, accessible from within the instance.

19
Q

Q: What are placement groups in EC2?

A

A: Logical groupings of instances for specific networking needs, such as low latency or high throughput.

20
Q

Q: What are the types of EC2 placement groups?

A

A: Cluster, Partition, and Spread placement groups.

21
Q

Q: What is enhanced networking in EC2?

A

A: A feature providing higher throughput and lower latency by using advanced network adapters.

22
Q

Q: What is the EC2 Nitro system?

A

A: A platform that improves performance, security, and speed by offloading virtualization to dedicated hardware.

23
Q

Q: What are Elastic GPUs in EC2?

A

A: GPU resources that can be added to EC2 instances for graphics-intensive workloads.

24
Q

Q: What is EC2 Instance Connect?

A

A: A browser-based method for connecting to EC2 instances via SSH.

25
Q

Q: What is an EC2 Spot Fleet?

A

A: A collection of Spot Instances and optionally On-Demand Instances managed as a single entity.

26
Q

Q: What is EC2 Hibernate?

A

A: A feature that saves the instance state to EBS, allowing it to restart quickly from where it left off.

27
Q

Q: What are Dedicated Instances?

A

A: Instances that run on hardware dedicated to a single customer.

28
Q

Q: How do you monitor EC2 instances?

A

A: Using Amazon CloudWatch for metrics, logs, and alarms.

29
Q

Q: What is Elastic Fabric Adapter (EFA)?

A

A: A network interface for high-performance computing (HPC) and machine learning workloads.

30
Q

Q: What is user data in EC2?

A

A: Scripts or commands specified at instance launch to configure the instance automatically.

31
Q

Q: What are some limits of EC2?

A

A: Limits on the number of instances per region, default vCPUs, and specific service quotas (modifiable via AWS Support).

32
Q

Q: What is the EC2 Savings Plan?

A

A: A flexible pricing model that provides lower rates on EC2 usage in exchange for a commitment to a consistent usage amount.