Aws Certification Exam - Tips/ Guidance
1) AWS Solutions Architect Associate Exam
2) AWS SysOps Administrator - Associate
3) AWS Developer Associate
2) Doing many QwikLabs
3) Try to learn each topic.
4) Spending lots of time answering questions and reading about people's experiences
5) Getting hands-on and building things in AWS, such as:
I built VPCs with bastions
NATs
VPC endpoints
and local-traffic-only subnets
Migratin sample web site to AWS and used RDS and both internal and external Route53 hosted zones; etc.
Here are my more-traditional exam tips:
Spot instances are good for cost optimization, even if it seems you might need to fall back to On-Demand instances if you wind up getting kicked off them and the timeline grows tighter.
The primary (but still not only) factor seems to be whether you can gracefully handle instances that die on you--which is pretty much how you should always design everything, anyway!
The term "use case" is not the same as "function" or "capability".
A use case is something that your app/system will need to accomplish, not just behaviour that you will get from that service. In particular, a use case doesn't require that the service be a 100% turnkey solution for that situation, just that the service plays a valuable role in enabling it.
There might be extra, unnecessary information in some of the questions (red herrings), so try not to get thrown off by them. Understand what services can and can't do, but don't ignore "obvious"-but-still-correct answers in favour of super-tricky ones.
If you don't know what they're trying to ask, in a question, just move on and come back to it later (by using the helpful "mark this question" feature in the exam tool).
You could easily spend way more time than you should on a single confusing question if you don't triage and move on.
My exam questions required me to understand features and use cases of:
VPC peering,
cross-account access,
DirectConnect,
snapshotting EBS RAID arrays,
DynamoDB,
spot instances,
Glacier,
AWS/user security responsibilities, etc.
Overall Topics :
1.Designing highly available, cost efficient, fault tolerant, scalable systems
2.Implementation/Deployment
3.Security
4.Troubleshooting
Extra notes about QwikLabs:
As one example, the flexibility of EBS was really locked in for me when a QwikLab had me snapshot and create a second EBS volume to avoid re-downloading a large installer on a second EC2 instance.
Practice tests @ - https://www.whizlabs.com/aws-solutions-architect-professional/
- Do take time to do the AWS exam Prep course .
- Explore through the lectures several times.
- Read all the white papers slowly and carefully, stopping frequently to think about when and how that service or feature could be used and when it is not an optimal solutions. Think in terms of: technical fit, operational and support fit, and cost fit. How does it scale up, how does it scale back, how long does that take, is there a performance hit while it is doing that? Is it more cost effective in high load situations or low load situation? What is the trade off between doing it yourself and using the service?
- Whenever you see a term you should be able to talk about it for 30 seconds. Pros, Cons, best use case, worst use case, related services, common misunderstandings.
- Don't waste time rehearsing practice questions. Use them as research challenges. Why answers are wrong is possibly more important than why an answer is right.
If you have seen a question more that twice it is of no further value. Any further use of it leads to memorizing random answers which isn't learning and will not help you on the exam.
If you do these things you should pass either exams with a healthy score.
References for best questions - https://www.briefmenow.org/amazon/which-of-the-design-patterns-below-should-they-use-5/
Exam Essentials
Understand the global infrastructure. AWS provides a highly available technology infrastructure platform with multiple locations worldwide. These locations are composed of regions and Availability Zones. Each region is located in a separate geographic area and has multiple, isolated locations known as Availability Zones.
Understand regions. An AWS region is a physical geographic location that consists of a cluster of data centers. AWS regions enable the placement of resources and data in multiple locations around the globe. Each region is completely independent and is designed to be completely isolated from the other regions. This achieves the greatest possible fault tolerance and stability. Resources aren't replicated across regions unless organizations choose to do so.
Understand Availability Zones. An Availability Zone is one or more data centers within a region that are designed to be isolated from failures in other Availability Zones. Availability Zones provide inexpensive, low-latency network connectivity to other zones in the same region. By placing resources in separate Availability Zones, organizations can protect their website or application from a service disruption impacting a single location.
Understand the hybrid deployment model. A hybrid deployment model is an architectural pattern providing connectivity for infrastructure and applications between cloud-based resources and existing resources that are not located in the cloud.
Understand the difference between a region, an Availability Zone(AZ) and an Edge Location.
è A Region is a physical location in the world which consists of two or more Availability Zones(AZ’s).
è An AZ is one ore more discrete data centers, each with redundant power, networking and connectivity, housed in separate facilities.
è Edge Locations are end points for AWS which are used for caching content. Typically this consists of CloudFront, Amazon’s Content Delivery Network(CDN).
S3 – Exam Tips :
è Remember that S3 is Object-based : ie., allows you to upload files.
è Files can be from 0 bytes to 5 TB.
è There is unlimited Storage
è Files are stored in Buckets.
è S3 is a universal namespace. That is, names must be unique globally.
è Read after write consistency for PUTS of new objects.
è Eventual consistency for overwrite PUTS and DELETES ( can take some time to propagate).
è Exam questions for S3 Storage Classes/Tiers :
- S3( durable, immediately available, frequently accessed).
- S3 – IA (durable, immediately available, frequently accessed).
- S3 One Zone – IA ( even cheaper than IA, but only in one availability zone).
- Glacier – Archived data, where you can wait 3 – 5 hours before accessing.
è In exam point of view remember the core fundamentals of an S3 Object :
- Key(name)
- Value(data)
- Version ID
-- Metadata
- Subresources
- ACL
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