20+ practice questions focused on Cost and Performance Optimization — one of the most tested topics on the AWS Certified SysOps Administrator Associate SOA-C02 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Cost and Performance Optimization PracticeA company uses Amazon S3 to store large files that are frequently accessed for the first 30 days after upload. After 30 days, access frequency drops significantly but users still need retrieval within minutes. The SysOps administrator wants to minimize storage costs while ensuring low-latency access for frequently accessed files and automatic optimization for changing access patterns. Which S3 storage class configuration should the company use?
Explanation: B is correct because S3 Intelligent-Tiering automatically moves objects between access tiers (frequent and infrequent access, with optional archive access tiers) based on changing access patterns, with no retrieval fees for the frequent and infrequent access tiers and low-latency access. This matches the requirement of frequent access for the first 30 days, then infrequent access with minutes-later retrieval, while minimizing storage costs without manual intervention.
A company runs a mix of Amazon EC2 instances, Amazon RDS databases, and AWS Lambda functions for production workloads. The workloads are steady-state and predictable. The SysOps administrator wants to reduce costs while maintaining flexibility to change instance families and regions. Which pricing model should be recommended?
Explanation: Standard Reserved Instances provide significant discounts for steady-state, predictable workloads on both EC2 and RDS. Although they lock you into a specific instance family and region, you can choose Convertible Reserved Instances to retain some flexibility. Compute Savings Plans do not cover RDS databases, which are explicitly part of the workload mix, making them unsuitable. Spot Instances are not designed for steady-state workloads, and EC2 Instance Savings Plans only cover EC2 instances.
A company stores video files in Amazon S3. Files are accessed frequently for the first 30 days, then weekly for the next 6 months, and then rarely after that. Files must be retained for 5 years and any access must be served within minutes. The SysOps administrator wants to minimize storage costs. Which lifecycle policy is most cost-effective?
Explanation: Transition objects to S3 Standard-IA after 30 days to match the weekly access pattern at lower cost than S3 Standard. Then transition to S3 Glacier Instant Retrieval after 6 months for data that is rarely accessed but requires retrieval within milliseconds. Glacier Instant Retrieval offers the lowest storage cost among storage classes that support millisecond retrieval, making it ideal for long-term retention with the requirement that any access be served within minutes. Other classes like Glacier Deep Archive do not support expedited retrieval and have retrieval times of 12–48 hours, which fails to meet the within-minutes requirement.
A company runs a CPU-intensive batch processing job daily on a single Amazon EC2 instance. The job requires high compute performance but uses minimal memory. The instance is typically idle for the rest of the day. The SysOps administrator needs to minimize costs while ensuring the job completes within a 1-hour window. Which purchasing option and instance family should the administrator use?
Explanation: A Reserved Instance with a compute-optimized (C-family) instance is the appropriate choice because the job requires high CPU performance and must complete reliably within a 1-hour window. Spot Instances are subject to interruption and cannot guarantee completion, especially for a single-instance batch job. While Reserved Instances involve a 1-year commitment, this option ensures the instance is available when needed, and the compute-optimized family matches the CPU-intensive profile. On-Demand instances would be cheaper for low utilization, but that option is not available with a compute-optimized family in the given choices.
A company runs a batch processing job every night that takes exactly 2 hours to complete. The job is time-sensitive and cannot tolerate interruptions. The SysOps administrator needs to minimize compute costs for the Amazon EC2 instances used during this job. The job runs every day and has predictable resource requirements. Which purchasing option should the administrator choose?
Explanation: A Standard Reserved Instance is the best choice because the job runs every night for exactly 2 hours with predictable resource requirements, making it ideal for a 1-year or 3-year commitment that provides a significant discount (up to 72%) over On-Demand pricing. Since the job cannot tolerate interruptions, Reserved Instances offer capacity reservation and cost savings without the risk of termination that Spot Instances carry.
+15 more Cost and Performance Optimization questions available
Practice all Cost and Performance Optimization questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Cost and Performance Optimization. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Cost and Performance Optimization questions on the SOA-C02 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Cost and Performance Optimization is tested as part of the AWS Certified SysOps Administrator Associate SOA-C02 blueprint. Practicing with targeted Cost and Performance Optimization questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Cost and Performance Optimization is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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