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AWS Certified Solutions Consultant > EC2 > Flashcards

EC2 Flashcards

1
Q

EC2 stands for

A

Elastic Compute Cloud

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2
Q

EC2

A

quickly scale capacity up or down as your computing requirements change through. EC2’s are essentially virtual machines

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3
Q

4 EC2 pricing models

A
  1. On demand 2. Reserved 3. Spot 4. Dedicated hosts
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4
Q

EC2 Spot pricing

A

like the stock market for Amazon extra capacity

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5
Q

EC2 Dedicated Host

A

physical EC2 server dedicated to your use

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6
Q

IOPS acronym

A

Input Output per second

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7
Q

T or F: If you create an inbound rule for a port type and range, it is automatically allowed for outbound as well

A

T

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8
Q

With security groups everything is ___________ by default

A

blocked

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9
Q

T or F: You can multiple security groups attached to one EC2 instance

A

T

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10
Q

Elastic Block Store (EBS)

A

virtual hard disk in the cloud. Persistent block storage volumes for use with Amazon EC2 instances

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11
Q

5 types of EBS

A
  1. General Purpose 2. Provisioned IOPS (SSD) 3. Throughput Optimized Hard Disk Drive 4. Cold Hard Disk Drive 5. Magnetic
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12
Q

General Purpose EBS

A

for most workloads. max 16k IOPS

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13
Q

Provisioned IOPS EBS

A

for databases. Max IOPS 64k

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14
Q

Throughput Optimized Hard Disk Drive EBS

A

for big data and data warehouses. Max IOPS 500

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15
Q

Cold Hard Disk Drive EBS

A

for file servers. Max IOPS 250

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16
Q

Magnetic EBS

A

for infrequently accessed data. 40-200 IOPS

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17
Q

T or F: You can move EBS volumes to AZ’s other than the one your EC2 instance is in

A

T

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18
Q

Snapshots exist where?

A

S3

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19
Q

Snapshots

A

Point in time copies of volumes

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20
Q

Instance store (ephemeral storage)

A

root device for an instance launched from the AMI is an instance store volume created from a template stored in S3. Cannot be stopped.

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21
Q

Elastic Network Interface (ENI)

A

virtual network card for EC2. Gives basic networking. Gives you private and public IP addresses

22
Q

Enhanced Networking

A

uses Single root I/O virtualization (SR-IOV) to provide HPC capabilities. Need speeds 10-100 GBps

23
Q

Elastic Fabric Adapter (EFA)

A

network device you can attach to your EC2 to accelerate HPC and ML apps. Can use OS bypass if you’re running Linux

24
Q

Root Device Volume

A

Hard disk that has your OS on it

25
Q

Can you share snapshots?

A

Only if they are unencrypted

26
Q

How do you encrypt a root device volume if you don’t do it at creation?

A

create snapshot of unencrypted volume, create copy of snapshot and select encrypt option, create ami from encrypted snapshot, and use that ami to launch new encrypted instances

27
Q

Spot Instances

A

take advantage of unused EC2 capacity at 90% discount. Like spot pricing in the stock market. Use this with flexible apps, not critical apps.

28
Q

Spot Fleet

A

Collection of spot and on demand instances. Attempts to launch number of instances to meet demand in your price restraints.

29
Q

Spot Fleet strategies

A
  1. capacity optimized 2. diversified 3. lowest price 4. InstancePoolstoUseCount - spot instances distributed across number of spot instance pools you specify. Must use in combination with lowest price
30
Q

Spot Block

A

block spot instances from terminating

31
Q

Ec2 Hibernate

A

OS told to hibernate and saves contents from instance memory (RAM) to your EBS root volume. RAM contents reloaded when you restart.

32
Q

T or F: root device volume must be encrypted to use hibernation

A

T

33
Q

AWS CloudTrail

A

increase visibility into user and resource activity by recording AWS management console actions and API calls. Audit log to track who is making changes and updates

34
Q

Boot Strap Scripts

A

automate processes upon creation of objects

35
Q

Elastic File System (EFS)

A

file storage service for EC2 instances. Storage capacity scales up and down on demand.

36
Q

FSx for Windows File Servver

A

native MS windows file system to easily move windows based apps that require file storage to AWS

37
Q

FSx for Lustre

A

file system optimized for compute intensive workloads

38
Q

3 types of EC2 placement groups

A
  1. Clustered Placement Groups 2. Spread Placement Groups 3. Partitioned
39
Q

Clustered Placement Group

A

grouping of instances within single AZ. For apps that need low latency and high network throughput

40
Q

Spread Placement Group

A

group of instances that are each place don distinct underlying hardware. For small number of critical instances that should be kept separate from each other for redundancy

41
Q

Partitioned Placement Group

A

each partition in placement group has its own set of racks. Each rack has own network and power source. Isolates impact of hardware failure.

42
Q

HPC stands for…

A

High Performance Compute

43
Q

Enhanced networking

A

uses single root I/O virtualization (SR-IOV) to provide high performance networking capabilities on supported instance types.

44
Q

Elastic Network Adapter (ENA)

A

type of enhanced networking. Supports network speeds up to 100GBps

45
Q

OS Bypass

A

enables HPC and ML apps to bypass OS kernel and communicate directly with EFA device

46
Q

AWS Batch

A

runs hundreds of thousands batch computing jobs. allows you to run single job that spans multiple EC2 instances

47
Q

AWS Parallel Cluster

A

deploy and manage HPC clusters on AWS

48
Q

WAF stands for…

A

Web Application Firewall

49
Q

AWS WAF

A

web app firewall that lets you monitor HTTP and HTTPS requests that are fwded to Amazon CloudFront, an app load balancer, or API gateway

50
Q

3 different behaviors AWS WAF allows

A
  1. allow all requests except ones you specify 2. block all requests except ones you specify 3. count requests that match properties you specify.

AWS Certified Solutions Consultant (15 decks)

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