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AWS - Acloud guru > Chapter 4: EC2 > Flashcards

Chapter 4: EC2 Flashcards

1
Q

What does EC2 Stand for?

A

Amazon Elastic Compute Cloud

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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2
Q

What is EC2?

A

Web service that provides resizable compute capacity in the cloud.

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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3
Q

What are the 4 different EC2 Pricing Models

A

1) On Demand
2) Reserved
3) Spot
4) Dedicated Hosts

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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4
Q

Define EC2 “On Demand” Pricing

A

Allows you to pay a fixed rate by the hour (or by the second) with no commitment.

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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5
Q

Define EC2 “Reserved” Pricing

A

Provides you with a capacity reservation and offer a significant discount on the hourly charge for an instance. Contract terms are 1 year or 3 year terms.

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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6
Q

Define EC2 “Spot” Pricing

A

Enables you to bid whatever price you want for instance capacity, providing even greater savings if your applications have flexible start and end times.

Like the stock markets.

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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7
Q

Define EC2 “Dedicated Hosts” Pricing

A

Physical EC2 server dedicated for your use. Dedicated hosts can help you reduce costs by allowing you to use your existing server-bound software licenses.

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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8
Q

What is “On Demand” Pricing useful for?

A

1) Users that want the low cost and flexibility of Amazon EC2 without any up-front payment or long-term commitment
2) Applications with short term, spiky, or unpredictable workloads that cannot be interrupted
3) Applications being developed or tested on Amazon EC2 for the first time

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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9
Q

What is “Reserved” Pricing useful for?

A

1) Applications with steady state or predictable usage
2) Applications that require reserved capacity
3) Users able to make upfront payments to reduce their total computing costs even further

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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10
Q

What are the 3 different Reserved Pricing Types

A

1) Standard Reserved Instances
2) Convertible Reserved Instances
3) Scheduled Reserved Instances

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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11
Q

Define “Standard Reserved Instance” Pricing type

A

These offer up to 75% off on demand instances. The more you pay up front the longer the contract, the greater the discount

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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12
Q

Define “Convertible Reserved Instances”

A

These offer up to 54% off on demand capability to change the attributes of the RI as long as the exchange results in the creation of Reserved Instances of equal or greater value.

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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13
Q

Define “Scheduled Reserved Instances”

A

These are available to launch within the time windows you reserve. This option allows you to match your capacity reservation to predictable recurring schedule that only requires a fraction of a day, a week, or a month.

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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14
Q

What is “Spot” Pricing useful for?

A

1) Applications that have flexible start and end times
2) Applications that are only feasible at very low compute prices
3) Users with urgent computing needs for large amounts of additional capacity

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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15
Q

What is “Dedicated Hosts” Pricing useful for?

A

1) Useful for regulator requirements that my not support multi-tenant virtualization
2) Great for licensing which does not support multi-tenancy or cloud deployments
3) Can be purchases On-Demand (hourly)
4) Can be purchased as Reservation for up to 70% off the On-Demand price

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

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16
Q

What are the different EC2 Instance types? (Likely won’t be tested on)

A

Fight-Dr-McPx-Z AU.

F - FPGA 
I - IOPS
G - graphics
H - high disk throughput
T - general purpose
D - density
R - RAM
M - main choice for your general-purpose apps
C - compute
P - graphics(pics)
X - extreme memory
Z - extreme memory and CPU
A - ARM-based workloads and U - bare metal

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/ec2-101/watch

17
Q

What does AMI stand for?

A

Amazon Machine Image - basically a virtual machine

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/hands-on-pt1/watch

18
Q

What does the following command do?

400 FILENAME.pem

A

Changes the permissions of the file (key pair file) to lock the key down

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/hands-on-pt1/watch

19
Q

What is the format of the command that allows you to access your EC2 instance?

A

ssh ec2-user@IP-ADDRESS -i KEYPAIRFILENAME.pem

Eg.
ssh ec2-user@54.162.133.164 -1 MyUSE1KP.pem

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/hands-on-pt1/watch

20
Q

What command can you use to become a root user?

A

sudo su

Reference:
https://learn.acloud.guru/course/aws-certified-solutions-architect-associate/learn/ec2/hands-on-pt1/watch

AWS - Acloud guru (4 decks)

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