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AWS Exam Study > EC2 - Solutions Architect Associate Level > Flashcards

EC2 - Solutions Architect Associate Level Flashcards

1
Q

Networking has two sorts of IPs.

What are they?

A

IPv4

IPv6

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2
Q

Which network is the most common format used online?

A

IPv4

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3
Q

Which network is newer and solves problems for the Internet of Things (IoT)?

A

IPv6

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4
Q

How many different addresses does this network allow in the public space?

A

3.7 billion/IPv4

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5
Q

If you need to have a fixed public IP for your instance, what do you need?

A

Elastic IP

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6
Q

When you stop and start an EC2 instance, can it change its public IP?

A

Yes

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7
Q

What is an Elastic IP?

A

A public IPv4 you own, as long as you don’t delete it

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8
Q

How many instances can you attach an elastic IP to at a time?

A

One

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9
Q

How many elastic IPs can be in your account at a time?

A

Five

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10
Q

Why should you try avoid using elastic IP?

A

They often reflect poor architectural decisions

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11
Q

What is the first thing you should try using before an Elastic IP?

A

A random IP and register a DNS name to it

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12
Q

What is the second thing you should try using before an Elastic IP?

A

A Load Balancer and don’t use a public IP

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13
Q

When do you use placement groups?

A

When you want control over the EC2 Instance placement strategy

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14
Q

What are the 3 types of placement groups?

A
  • Cluster
  • Spread
  • Partition
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15
Q
  • Same Rack Same AZ
  • Low Latency
  • 10Gbps bandwidth between instances
  • If the rack fails, all instances fails at the same time

What placement group is this?

A

Cluster Placement Group

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16
Q

A computer network that is optimized to process a very high volume of data messages with minimal delay.

A

Low Latency

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17
Q

What does Gbps stand for?

A

Gigabits per second

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18
Q

This is a Big Data job that needs to complete fast and an application that needs extremely low latency and high network throughput

What placement group should you use?

A

Cluster

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19
Q
  • Each EC2 instance is on a different hardware
  • Can span across AZ
  • Reduced risk of simultaneous failure because EC2 Instances are on different physical hardware
  • Limited to 7 instances per AZ per placement group

Which placement group is this?

A

Spread Placement Group

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20
Q

This application will need to maximize high availability and each instance must be isolated from failure from each other
Critical Applications

What placement group should you use?

A

Spread

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21
Q
  • Up to 7 per (blank) AZ
  • Can span across multiple AZs in the same region
  • Up to 100s of EC2 instances
  • The instances in a (blank) do not share racks with the instances in the other (blank)
  • A (blank) failure can affect many EC2 but won’t affect other (blank)
  • EC2 instances get access to the (blank) information as metadata

What type of placement group is this?

A

Partition Placement Group

22
Q

Big Data applications such as HDFS, HBase, Cassandra & Kafka

What placement group should you use?

A

Partition

23
Q

What does IP stand for?

A

Internet Protocol

24
Q

What does GBps stand for?

A

Gigabytes per second

25
Q

What does DNS stand for?

A

Domain Name System

26
Q

A logical component in a Virtual Private Cloud that represents a virtual network card

A

Elastic Network Interface (ENI)

27
Q

The in-memory (RAM) state is preserved

A

EC2 Hibernate

28
Q

After EC2 Hibernate, the instance boot is what?

A

Much faster

29
Q

The EC2 Hibernate instance RAM size must be less than what?

A

150 GB

30
Q

How long can an instance be hibernated?

A

Up to 60 days

31
Q

What does RAM stand for?

A

Random Access Memory

32
Q

What is RAM?

A

The computer’s short term memory, which it uses to handle all active task and apps

33
Q

The more RAM a computing device has, the what?

A

Faster it runs

34
Q

What does OS stand for?

A

Operating system

35
Q

What is the most important type of system software in a computer system?

A

OS

36
Q

Without an OS what can’t a user do?

A

A user cannot run an application program on their computer

37
Q

EC2 Nitro is necessary for how many EBS IOPS?

A

64,000

38
Q

What does IOPS stand for?

A

Input/Output Operations Per Second

39
Q

What does IOPS do?

A

Measures server performance

40
Q

If you need a higher speed EBS volume

what should you use?

A

EC2 Nitro type of instance to leverage the increased level of IOPS

41
Q

EC2 instances comes with a combination of what?

A

RAM and vCPU

42
Q

What does vCPU stand for?

A

Virtual Centralised Processing Unit

43
Q

Represents a portion or share of the underlying, physical CPU that is assigned to a particular virtual machine (VM)

A

vCPU

44
Q

Can you optimise CPU options?

Licensing Cost

A

Yes

45
Q

What is EC2 Capacity Reservations?

A

It ensures you have EC2 Capacity when needed

46
Q
  • Manual or planned end-date for the reservation
  • No need for 1 or 3 year commitment
  • Capacity access is immediate, you get billed as soon as it starts
A

EC2 Capacity Reservations

47
Q

By using Spot Block Instances, you reserve a set of Spot EC2 instances for how long?

A

1 to 6 hours without interruption

48
Q

Cluster Placement Groups place your EC2 instances next to each other which gives you what?

A

High performance computing (HPC) and networking

49
Q

ENIs are bounded to a what?

A

Specific AZ

50
Q

Can you attach an ENI to an EC2 instance in a different AZ? Why?

A

No because ENIs are bounded to a specific AZ

51
Q

To enable EC2 Hibernate, what must the EC2 Instance Root Volume be?

And also what?

A

An EBS volume

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