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AWS Architect Associate > Old Cards > Flashcards

Old Cards Flashcards

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1
Q

How many copies of Aurora for High AVailability

A

2 per AZ, 3 AZ minimum

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2
Q

How many copies for Aurora’s databases can be lost before affecting: a) Write b) Read

A

a) 2
b) 3

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3
Q

How does Aurora know there’s a failure

A

Continuous scans for data block errors

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4
Q

In Route53, what happens to a node with a failed health check

A

The node is removed until it becomes heathy

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5
Q

What is the retention window for Kinesis Streams

A

1 - 7 days; the default is 1

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6
Q

Which can run in multi-AZ: Memcached or Redis

A

Redis

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7
Q

In Cognito, what are Identity Pools

A

A store of Identity data, providing temporary AWS credentials

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8
Q

Describe the Backup and Restore strategy of RDS

A

Full backup, with Transaction logs during the day, stored in S3
Restore specified day, along with Transaction logs

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9
Q

What happens to RDS during backups

A

I/O may be suspended or there may be latency

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10
Q

In DNS, what is a PTR record

A

It is a reverse A record (ie: an IP address to a domain)

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11
Q

What are 3 levels of Flow Logs

A

VPC
Subnet
Network Interface

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12
Q

What are 4 types of S3 Encryption

A

SSE-S3
SSE-KMS
SSE-C
Client Library

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13
Q

What are 3 ways to add scale to a MySQL RDS instance

A

Add Read Replicas
Provision a larger EC2 instance
Use Elasticache for frequently read, static data

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14
Q

What are 2 types of CloudWatch Dashboards

A

Global
Regional

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15
Q

What are 3 types of Placement Groups

A

Clustered: Instances in a single AZ
Spread: Instances in multiple AZs
Partitioned: Instances spread across multiple partitions in each AZ

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16
Q

Which scales Horizontally: Memcached or Redis

A

Memcached

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17
Q

In Cognito, what are User Portals

A

User Directories, allowing users to Sign Up and Log into apps using a JSON Web Token (JWT)

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18
Q

Do Elastic Load Balancers have an IP Address

A

No, they have a DNS Name

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19
Q

What Statuses do Instances have in an Elastic Load Balancer

A

In Service
Out of Service

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20
Q

What are the Task/Message differences in SWF and SQS

A

SWF is Task-based
SQS is Message-based

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21
Q

What are the Assigned/Process differences in SWF and SQS

A

SWF Tasks are assigned only once and never duplicated
SQS Messages may be processed multiple times

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22
Q

What are the Tracking differences in SWF and SQS

A

SWF tracks Tasks and Events
SQS doesn’t track anything

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23
Q

Given the choice, should I use a CNAME or an Alias record

A

Always use an Alias; they are cheaper and can be used on an Elastic Load Balancer

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24
Q

In SQS, what does the attribute DelaySeconds do

Study These Flashcards
A

SQS will hide a new message for the specified time

25
In SWF, what is the maximum time a Task can remain in a workflow
One year
26
In Route53, what is MultiValue routing
Send traffic from a random set of healthy nodes to a single resource
27
What three ways can you allow communication between a VPC and On-Premises
1) Configure a VPC subnet that doesn't conflict with subnets on the On-Premises network 2) Add an Internet Gateway to the VPC for VPN connectivity 3) Configure Direct Connect
28
What are the rules for AMI publication
1) Disable Services and Protocols that authenticate in cleartext (ie: FTP) 2) Don't start unnecessary services (ie: only SSH and RDP) 3) Securely delete: - AWS credentials - Third party credentials - Any certificates and keys 4) Ensure installed software doesn't use default credentials
29
What parts of the AWS Infrastructure does AWS secure
Data Centers Hardware MFA Appliances 24x7 Site Security Least Access
30
What are your responsibilities for securing AWS resources
Anything you put on or connect to the cloud
31
What are 2 ways you can revert from Dedicated to Default hosting
Use the AWS CLI to change the VPC's Tenancy Use the AWS CLI to change the Instance Placement attribute
32
What happens when a Spot instance's Bid Price is exceeded
The Instance-Action variable is created The Action variable is set to Terminate The time value is set to 2 minutes in the future
33
In SQS, what is the maximum Visibility Timeout
14 days
34
In SQS, what does WaitTimeSeconds do
The amount of time to wait for messages
35
Do you create Roles for Users, Groups or Services
Services
36
Describe Disk and Memory security for instances
No access to raw disk Virtual drives are auto-reset for all blocks Memory is zero set before release
37
What are the 3 Actors for SWF
Workflow Starter: app that initiates the workflow Activity Workers: Carry out tasks (can be a human) Decider: Controls the flow of Activity Workers
38
What are the 5 areas checked by Trusted Advisor
Cost Optimization Performance Security Fault Tolerance Service Limits
39
How long can a SQS message remain in the queue
1 - 14 days; default is 4 days
40
What type of storage is used in RedShift
Columnar storage
41
What type of compression is used in RedShift
Advanced Compression based upon data
42
How does RedShift distribute processing
Massively Parallel Processing
43
What are the 4 support options
Basic Developer Business Enterprise
44
What are the 4 parts of CloudWatch
1) Alarms: Notification when threshold is reached 2) Events: Respond to state changes (ie: EC2 start up) 3) Logs: Aggregate, Monitor and Store logs (requires EC2 Agent) 4) Dashboards: Customized display
45
How do you make an EC2 instance publicly available when you've forgotten to assign a public IP Address
Create an Internet Gateway Create an Elastic IP Address (EIP) Associate the EIP to the instance
46
You are creating a VPN to connect a customer network to a VPC. What 3 things do you need to configure
An On-Premises Customer Gateway A Virtual Private Gateway A VPC with a hardware VPN
47
In RDS, what are the attributes of Read Replicas
Asynchronous Replication Must enable Automated Backups
48
What RDS database engines support Multi-AZ with two readable standbys
MySQL and PostgreSQL
49
In RDS, what are the attributes of Multi-AZ deployments
Automatic Failover Synchronous Replication
50
What are the 3 DynamoDB structures
Collection (table) Document (record) Key/Value Pair (field)
51
In RDS, what are 2 types of backups
Automated Snapshot
52
In RDS, what happens when you restore
A new instance is created
53
What is needed to create an Elastic Load Balancer (ELB)
At least 2 Public subnets in different AZs
54
How many IP Addresses are reserved per subnet
The first 4 and the Last IP addresses
55
For which S3 Events can you send notifications
Put Post Copy Delete
56
What are the 3 types of Glacier
Instant Retrieval: Archive data accessed once a quarter. Retrieval times in milliseconds, minimum of 90 days of storage Flexible Retrieval: Archive data accessed 1-2 times per year. Minimum of 90 days of storage. Retrieval times: - Expedited: 1 - 5 minutes - Standard: 3 - 5 hours - Bulk: 5 - 12 hours Deep Archive: Long-lived archive data accessed less than once per year. Minimum of 180 days of storage. Retrieval times: - Standard: Within 12 hours - Bulk: Within 48 hours
57
What are the 3 data formats supported by Athena
JSON Apache Parquet Apache ORC
58
What are the 5 types of traffic not logged in a Flow Log
AWS DNS traffic EC2 Windows License Activation Instance Meta data on 169.254.169.254 DHCP traffic VPC reserved IP Address traffic

AWS Architect Associate (2 decks)

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