考試說明
考試時間 140 分鐘，共 65 題，答對 72% 才算及格。
若你之前有通過其他張 AWS 證照，記得取用半價的折扣碼，並於結帳時使用。
學習資源
此次考試以 Ultimate AWS Certified Solutions Architect Associate 2022 此線上課程為主，若有不清楚的地方，再 google 線上資源，釐清內心疑問。
由於老師是法國人，英文雖有點口音，但不至於聽不懂，可開啟字幕，強化吸收效果。課程時數共 27 小時，完整涵蓋考試範圍，內容包含 hands-on exercise，跟著老師做一遍，可以強化理解力，減少需要記憶的資訊量。
考古題
若你有購買上述線上課程，最終會獲得一個折扣碼，以不到 $300 的價格購買 Udemy | AWS Certified Solutions Architect Associate 此考古題。
但此考古題有個問題，因講師是法國人，法式英文的考題，有時會難以理解題目，導致難以判斷該選哪個答案，但整體仍給予正面評價。
此份考題與實際考題相比，難度偏高、題目較冗長，若能仔細檢討每個題目的對錯原因，建立觀念，臨場考試善用刪去法來替除 distractors，就足以應付 SAA-C02 此考試。
準備建議
考題皆以情境題為主，需在多個選項中選擇最適切的答案，故確實掌握相仿的服務差異，才能在有限的時間內完成作答與重新做一次檢查，可自行製作比較表加深記憶，例如：
NAT Gateway vs. NAT Instance
| NAT Gateway | NAT Instance |
Availability | HA with multi-AZ (created in another AZ) | 使用 script 來做跨 instances failover |
Bandwidth | ~45 Gbps | Depends on EC2 instance type |
Maintenance | Managed by AWS | Managed by you |
Cost | Per hour & amount of data transfer | Per hour, EC2 instance type and size, + network $ |
Public IPv4 | ✅ |
Private IPv4 | ✅ |
使用 Security Groups |
| ✅ |
Use as Bastion host |
| ✅ |
支援 port forwarding |
| ✅ |
NACL vs. Security Group
NACL | Security group |
Subnet level | Instance level |
Support allow & deny rules | Support allow rules only |
Stateless: 明確載明 inbound & outbound | Stateful: 預設允許 outbound traffic |
Rules 依序評估，當出現相牴觸時，first match wins | All rules are evaluated |
自動 apply 於 EC2 subnet | 手動設定於 EC2 |
可用於設定 deny or block IPs | By default, the new security group allows no inbound traffic |
ALB vs. NLB vs. GLB vs. CLB
Feature | ALB | NLB | GLB | CLB |
LB Type | Layer 7 | Layer 4 | Layer 3 GW + Layer 4 LB |
|
Terminate flow / proxy behavior | ✅ | ✅ | NO | ✅ |
Protocol Listeners | HTTP(S), gRPC | TCP/UDP/TLS | IP | TCP/SSL/TLS/HTTP(S) |
Sticky Sessions | ✅ |
| ✅ |
|
No free tier |
| ✅ |
|
|
dynamic port mapping | ✅ |
|
|
備份策略比較
備份策略比較 | Backup & Restore | Pilot Light | Warm Standby | Multi Site |
Type | Active / Passive | Active / Active |
RTO / RPO | hours | 10s of minutes | minutes | Real time |
Use case | 非關鍵系統 | Data live, service idle (NO scaled-down version) | a scaled-down version of a fully functional environment is always running in the AWS cloud | Zero downtime |
Cost | $ | $$ | $$$ | $$$$ |
Savings Plans
| Compute Savings Plans | EC2 Instance Savings Plans |
Savings over on-demand | Up to 66% | Up to 72% |
Use case | 適用於擁有不同 EC2 instance family 的情境 | 適用於擁有相同 EC2 instance family 的情境 |
Automatically applies pricing to any instance family | ✅ |
|
Automatically applies pricing to ECS using Fargate | ✅ |
|
Automatically applies pricing across AWS Regions | ✅ | ✅ |
Launch Template vs. Launch Configuration
Launch Template (新) | Launch Configuration (舊) |
More features beside auto-scaling | Auto-scaling only |
Support multi-version | immutable |
Support granularity | Limited configuration |
Recommended by AWS | NOT recommended by AWS |
可使用 launch template 同時設定 on-demand 與 spot instance 的 mix instance |
|
考試結果
成績
證書
