The answer is the Compute Optimized instance family, specifically the C family. This is the correct choice because these instances are built around high-performance processors and are engineered for workloads that are CPU-intensive, such as image processing, batch processing, and media transcoding. Since the team’s service spends most of its time resizing and compressing images—a classic compute-bound task—the C family delivers the best price-performance starting point by maximizing CPU throughput without over-provisioning memory or network resources. On the SAA-C03 exam, this question tests your ability to match workload characteristics to the right EC2 family; a common trap is choosing General Purpose (like T or M) for sustained CPU loads, which can lead to CPU credit exhaustion or unnecessary cost. Memory Tip: Think “C for CPU” or “Compute Crunching” to instantly recall that the C family is your go-to for any processor-heavy task.
SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A team runs a CPU-intensive image processing service on Amazon EC2. The service spends most of its time resizing and compressing images, and the team wants the best price-performance starting point for compute-heavy work. Which EC2 instance family should they choose?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Compute optimized instances
Compute optimized instances (C family) are designed for workloads that benefit from high-performance processors, such as batch processing, media transcoding, and image processing. Since the team's service is CPU-intensive (resizing and compressing images), the C family provides the best price-performance starting point for compute-heavy work.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Memory optimized instances
Why it's wrong here
These are better when the workload is limited by RAM capacity, not CPU throughput.
✓
Compute optimized instances
Why this is correct
These instances are designed for workloads that need strong CPU performance and efficient compute price-performance.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Storage optimized instances
Why it's wrong here
These are intended for very high sequential read or write throughput to local storage.
✗
General purpose instances
Why it's wrong here
These are balanced, but they are not the best first choice for heavy CPU processing.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse 'CPU-intensive' with 'memory-intensive' or 'storage-intensive' and choose a general purpose instance (D) thinking it is a safe default, but the question specifically asks for the best price-performance starting point for compute-heavy work, which is the compute optimized family.
Detailed technical explanation
How to think about this question
Compute optimized instances (e.g., C7g, C6i) use high-frequency Intel Xeon Scalable or AWS Graviton processors with features like Intel Turbo Boost or all-core turbo, which directly benefit CPU-bound tasks like image resizing and compression. For example, the C7g instance based on AWS Graviton3 offers up to 25% better performance than C6g for compute-intensive workloads, and using instance store volumes or EBS-optimized connections can further reduce latency for temporary image data.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Design Secure Architectures — This question tests Design Secure Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Compute optimized instances — Compute optimized instances (C family) are designed for workloads that benefit from high-performance processors, such as batch processing, media transcoding, and image processing. Since the team's service is CPU-intensive (resizing and compressing images), the C family provides the best price-performance starting point for compute-heavy work.
What should I do if I get this SAA-C03 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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