DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 developer is building a serverless web application using AWS Lambda and Amazon DynamoDB. The application needs to perform complex aggregations on data stored in DynamoDB. Which AWS service should the developer use to perform these aggregations efficiently without reading all the data into Lambda?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DynamoDB Streams with AWS Lambda
Option C is correct because DynamoDB Streams captures item-level changes in near real-time and can trigger a Lambda function to perform incremental aggregations without scanning the entire table. This pattern avoids reading all data into Lambda, making it efficient for continuous aggregation workloads.
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.
✗
AWS Glue
Why it's wrong here
AWS Glue is for batch ETL and not directly triggered by DynamoDB changes for real-time aggregations.
✗
Amazon EMR
Why it's wrong here
Amazon EMR is for big data processing using Hadoop/Spark, unnecessary for the stated requirement for simple aggregations.
✓
DynamoDB Streams with AWS Lambda
Why this is correct
DynamoDB Streams capture changes and can trigger Lambda to update aggregated results in near real-time without scanning the full table.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon Redshift
Why it's wrong here
Redshift is a data warehouse, not suitable for real-time event-driven aggregation on DynamoDB.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may choose AWS Glue or Amazon EMR because they associate 'complex aggregations' with big data tools, overlooking that DynamoDB Streams with Lambda provides a serverless, incremental aggregation pattern that avoids full table scans.
Detailed technical explanation
How to think about this question
DynamoDB Streams records a time-ordered sequence of item-level modifications (inserts, updates, deletes) in a shard-based log. Lambda processes these events in batches of up to 1 MB per invocation, allowing you to maintain running aggregates (e.g., sums, counts) in a separate DynamoDB table or Amazon ElastiCache. This pattern is commonly used for leaderboards, real-time dashboards, or IoT sensor data summarization.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: DynamoDB Streams with AWS Lambda — Option C is correct because DynamoDB Streams captures item-level changes in near real-time and can trigger a Lambda function to perform incremental aggregations without scanning the entire table. This pattern avoids reading all data into Lambda, making it efficient for continuous aggregation workloads.
What should I do if I get this DVA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This DVA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DVA-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.