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  /Title (aws-solutions-architect-saa-c03-key-services.pdf)
  /Creator (Cheatography)
  /Author (bytebar)
  /Subject (AWS Solutions Architect (SAA-C03) Key Services Cheat Sheet)
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    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{AWS Solutions Architect (SAA-C03) Key Services Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{bytebar} via \textcolor{DarkBackground}{\uline{cheatography.com/218949/cs/48491/}}}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}bytebar \\
  \uline{cheatography.com/bytebar} \\
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 7th October, 2026.\\
   Updated 7th October, 2026.\\
   Page {\thepage} of \pageref{LastPage}.
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  Measure your website readability!\\
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\begin{multicols*}{3}

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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Compute}}  \tn
% Row 0
\SetRowColor{LightBackground}
EC2 & Virtual servers, you manage the OS. Exam asks: instance families for compute vs memory vs storage \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
Lambda & Serverless functions. Exam asks: event-driven, short tasks, zero servers \tn 
% Row Count 7 (+ 3)
% Row 2
\SetRowColor{LightBackground}
Auto Scaling & Adds/removes EC2 on demand. Exam asks: spiky traffic, always pair with ELB \tn 
% Row Count 10 (+ 3)
% Row 3
\SetRowColor{white}
Elastic Beanstalk & PaaS deploys. Exam asks: fastest deploy without managing infra \tn 
% Row Count 13 (+ 3)
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\mymulticolumn{2}{x{5.377cm}}{Compute block for SAA-C03 sheet}  \tn 
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\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Storage}}  \tn
% Row 0
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S3 & Object storage, 11 nines durability. Exam asks: static websites, data lakes, unstructured \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
S3 storage classes & Standard to Intelligent-Tiering to Glacier. Exam asks: pick by access frequency to cut cost \tn 
% Row Count 8 (+ 4)
% Row 2
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EBS & Block storage for one EC2 instance. Exam asks: gp3 vs io2 vs st1 by IOPS \tn 
% Row Count 11 (+ 3)
% Row 3
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EFS & Shared file storage across instances. Exam asks: multiple EC2 needing one filesystem \tn 
% Row Count 15 (+ 4)
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Storage Gateway & Hybrid on-prem to AWS. Exam asks: extend local storage to cloud \tn 
% Row Count 18 (+ 3)
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\mymulticolumn{2}{x{5.377cm}}{Storage block for SAA-C03 sheet}  \tn 
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VPC & Your isolated network. Exam asks: public vs private subnets, design with both \tn 
% Row Count 3 (+ 3)
% Row 1
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ELB \seqsplit{(ALB/NLB/GWLB)} & Load balancers. Exam asks: ALB=HTTP routing, NLB=extreme TCP performance \tn 
% Row Count 6 (+ 3)
% Row 2
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Route 53 & DNS plus routing policies. Exam asks: latency-based, geolocation, failover \tn 
% Row Count 9 (+ 3)
% Row 3
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CloudFront & CDN. Exam asks: cache at edge, pair with S3 or ALB origin \tn 
% Row Count 12 (+ 3)
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Direct Connect & Private dedicated link. Exam asks: consistent bandwidth, hybrid, bypasses internet \tn 
% Row Count 16 (+ 4)
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\mymulticolumn{2}{x{5.377cm}}{Networking block for SAA-C03 sheet}  \tn 
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RDS & Managed relational. Exam asks: Multi-AZ for HA, read replicas for scale \tn 
% Row Count 3 (+ 3)
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Aurora & AWS-built relational. Exam asks: MySQL/Postgres compatible, fastest failover \tn 
% Row Count 6 (+ 3)
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\seqsplit{DynamoDB} & Serverless NoSQL. Exam asks: single-digit ms latency, massive scale \tn 
% Row Count 9 (+ 3)
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% Row Count 15 (+ 3)
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IAM & Users, roles, policies. Exam asks: least privilege; roles for EC2, never embed keys \tn 
% Row Count 3 (+ 3)
% Row 1
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Security Groups & Stateful instance firewall, allow only. Exam asks: SG vs NACL differences \tn 
% Row Count 6 (+ 3)
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NACLs & Stateless subnet firewall. Exam asks: rule order matters, lowest numbered first \tn 
% Row Count 9 (+ 3)
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KMS & Encryption key management. Exam asks: SSE-S3 vs SSE-KMS vs SSE-C \tn 
% Row Count 12 (+ 3)
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WAF / Shield & Web firewall / DDoS protection. Exam asks: Layer 7 filtering vs volumetric defense \tn 
% Row Count 15 (+ 3)
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Decouple & SQS/SNS between tiers; "loosely coupled" is almost always right \tn 
% Row Count 3 (+ 3)
% Row 1
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Stateless & nothing on the instance; store state in ElastiCache/DynamoDB \tn 
% Row Count 6 (+ 3)
% Row 2
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Multi-AZ & high availability; NOT multi-region unless disaster recovery is named \tn 
% Row Count 9 (+ 3)
% Row 3
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Cheapest valid & the exam rewards cost-optimized answers; serverless and managed first \tn 
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SAA-C03 Study Guide — \$5 & Exam-ready? Get the full study guide at bytebarhq.com \tn 
% Row Count 3 (+ 3)
% Row 1
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ByteBar on YouTube & Free AWS walkthroughs: \seqsplit{youtube.com/@bytebarexamprep} \tn 
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% That's all folks
\end{multicols*}

\end{document}