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___3 - AWS SAA-C03_2024-1204 > AWS Fundamentals > Flashcards

AWS Fundamentals Flashcards

1
Q

What is the difference between a private and a public service

A

The networking only

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2
Q

Where does a private service run

A

Within a VPC

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3
Q

Where does a public service run

A

Withing the public internet zone

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4
Q

When can on-prem access VPCs

A

With a VPN or Direct Connect, or if it has an internet gateway

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5
Q

Is EC2 public or private

A

Private, but you can attach a public IP`

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6
Q

What does Route 53 allow you to do

A

Register domains and host zones on managed nameservers

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7
Q

What kind of resilience does route 53 have

A

Global resilience, it has a single db

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8
Q

What is an NS record type

A

Name server

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9
Q

What do A records and AAAA records do

A

They map host names to IP addresses

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10
Q

What is the difference between A and AAAA record

A

A: maps to IPv4 address, AAAA maps to IPv6 address

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11
Q

What do CNAME records do

A

They allow you to create the equivalent of DNS shortcuts, or host-to-host. They can only point to names

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12
Q

What can CNAME records point to

A

Name only, it cannot point to IP

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13
Q

What do MX records do

A

They are used for email

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14
Q

How many default VPCs do you have per region

A

Only one

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15
Q

How many custom VPCs can you have per region

A

Many

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16
Q

What is a difference between the default VPC and custom ones

A

The default one is a lot less flexible

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17
Q

What is a VPC CIDR

A

The range of addresses allocated to the VPC

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18
Q

How many IP ranges can a VPC get

A

The default VPC only gets one, custom VPCs can have many

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19
Q

What type of resilience do VPCs have

A

Regional resilience

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20
Q

What is the default VPC address range

A

172.31.0.0/16

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21
Q

How many subnets per AZ does the default VPC have

A

One

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22
Q

What port is used for RDP

A

3389

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23
Q

What port is used for SSH

A

22

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24
Q

What is the unit of billing for EC2

A

Per second

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25
What arethe three possible states of an EC2 instance
Running, Stopped, Terminated
26
What do you get charged for with a stopped instance
Disk
27
What does AMI stand for
Amazon Machine Instance
28
What kind of resilience does S3 have
Regional resilience
29
What is the maximum size of an object in an S3 bucket
5 TB
30
What is a restriction for bucket names
They must be globally unique
31
When does data leave the region an S3 bucket is in
It never does unless configured to do so
32
What is the structure of S3 bucket
Flat, no folders but prefixes so the UI acts lik eit does
33
What are all the restrictions for an S3 bucket name
- Name must be globally unique - 3-63 chars, all lowercase, no underscores - Starts with a lowercase letter or a number - Cannot be IP formatted
34
How many S3 buckets can an account have
100 is a soft limit, but you can have more with support requests. 1000 is a hard limit
35
How many objects can you have per bucket
Unlimited
36
What are the key and value in an S3 bucket
Key is the name of the object, Value is the data
37
What kind of storage is S3
Object, not file or block
38
Can you mount an S3 bucket
No, use EBS if you want to mount (EBS is block storage)
39
What is the only mandatory part of a CloudFormation template
The Resources section
40
What is the restriction concerning AWSTemplateFormatVersion
If you have one and a description, the description must come right after
41
When is the CloudFormation stack created
When you take a template and tell CloudFormation to do something with it
42
What is High Availability
Minimize any outages
43
What is Fault-Tolerance
Operate through faults, it is more complex and expensive
44
What is Disaster Recovery
What we do when HA and FT don't work
45
What Permissions options does and AMI have
Public Access, Owner only, Specific AWS Accounts
46
What is not stored in an AMI
- Instance settings - Network settings
47
What is stored in an AMI
- Boot volume - Data volume - AMI Permissions - Block Device Mapping
48
EC2 is an example of which service model
IaaS
49
Where is an AWS Public Service located
AWS Public zone
50
Who can connect to an AWS Public service
Anyone, but permissions are required to access the service
51
Where is an AWS Private Service located
VPC
52
Where is an AWS Private Service accessible from
- From the VPC it is located in - From other VPCs or on-prm networks as long as private networking is configured
53
What kind of service is S3
Public
54
What kind of storage system is S3
Object storage system
55
What amount of data can S3 buckets store
Unlimited
56
What is a CloudFormation Logical Resource
A resource defined in a CloudFormation Template
57
What is a CloudFormation Physical resource
A physical resource created by creating a CloudFormation stack
58
What is a simple definition of High Availability
A system which maximises uptime
59
What is a simple definition of a Fault Tolerant system
A system which allows failure, and can continue operating without disruption
60
How many DNS root servers exist
13
61
Who manages the DNS Root servers
12 large organizations
62
Who manages the DNS Root Zone
IANA
63
Which DNS Record Type converts a HOST into an IPv4 Address
A
64
Which DNS Record type is how the root zone delegates control of .org to the .org registry
NS
65
Which type of organisation maintains the zones for a TLD (e.g. .ORG)
Registry
66
Which type of organisation has relationships with the .org TLD zone manager allowing domain registration?
Registrar
67
How many subnets are in a default VPC
Equal to the number of AZ in the region the VPC is located in
68
What is the IP CIDR or a default VPC
172.31.0.0/16

___3 - AWS SAA-C03_2024-1204 (18 decks)

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