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Question 1
Was SQS the second service offered by AWS?
Correct Answer:
False
Explanation:
The correct answer is false because Amazon Simple Queue Service (SQS) was not the second service offered by AWS. In fact, the first service introduced by AWS was Amazon S3 (Simple Storage Service), which launched in March 2006. SQS was released later, in January 2004, after the initial batch of services. AWS began with a strong focus on providing infrastructure services, and while SQS is one of the foundational messaging services in cloud architecture, it is important to recognize the chronology of service launches. Understanding the history of AWS service releases is essential for grasping the evolution of cloud computing solutions and how they fit into the overall AWS ecosystem.
Question 2
What is the read throughput setting for an application that needs to read 25 items of 13KB per second using eventually consistent reads?
Correct Answer:
50
Explanation:
When determining the read throughput setting for an application using eventually consistent reads, it is important to understand how AWS DynamoDB calculates read capacity units. Each read capacity unit allows you to read one item up to 4 KB in size per second when using eventually consistent reads. In this case, the application needs to read 25 items that are each 13 KB in size. To calculate the required read capacity units: 1. Since each item is 13 KB, you can determine how many read capacity units are needed by dividing the item size by the maximum size per read capacity unit. 2. Each 13 KB item requires 4 read capacity units because 13 KB / 4 KB = 3.25, which rounds up to 4 units. 3. Therefore, for 25 items: 25 items * 4 read capacity units = 100 read capacity units. Since eventually consistent reads allow reading two items for one read capacity unit, you can divide the total read capacity units by 2: 100 read capacity units / 2 = 50. Thus, the required read throughput setting for this scenario is indeed 50. This number ensures that the application can handle the required read load efficiently using the eventually consistent read strategy.
Question 3
What is a key benefit of using SWF for workflows?
Correct Answer:
It reliably tracks the status of processing steps
Explanation:
Using Amazon Simple Workflow Service (SWF) offers the significant benefit of reliably tracking the status of processing steps throughout the workflow. SWF is designed to manage and coordinate distributed applications, enabling developers to define workflows that can encapsulate complex task executions involving multiple workers. One of the core features of SWF is its ability to maintain the state of each task within the workflow, allowing for better visibility and management of task execution. This capability ensures that developers can determine where in the process a specific task is at any given point. If a failure occurs, the workflow can be resumed from the point of failure rather than needing to restart the entire process, which enhances both reliability and efficiency. This tracking mechanism also aids in handling retries, managing timeouts, and SAMPLEorchestrating parallel processing, which might otherwise become challenging in distributed systems without such oversight. Overall, this leads to improved workflow robustness and operational integrity, making it easier for developers to create resilient applications.
Question 4
Which indexes in DynamoDB allow for a choice of sort keys?
Correct Answer:
Local secondary indexes
Explanation:
Local secondary indexes (LSIs) in DynamoDB allow for a choice of sort keys while sharing the same partition key as the base table. This means that for each item in the main table, you can create multiple local secondary indexes, each with a different sort key. This capability is particularly useful when you want to query data based on different attributes or ranges of values while keeping the same partitioning scheme. By allowing multiple sort keys, LSIs enable more flexible querying options on the same set of items, enhancing the ability to retrieve data efficiently based on additional criteria beyond the primary key. It's important to note that while global secondary indexes (GSIs) can provide additional flexibility—allowing for different partition keys and sort keys across potentially different data distributions—they do not utilize the same partition key, thus making LSIs unique in their ability to share this aspect. This distinction underlines the local secondary index's capability to serve specific use cases where sorting based on multiple attributes under a uniform partitioning strategy is desired.
Question 5
What is true about a scan operation in DynamoDB?
Correct Answer:
A scan reads every item in a table or secondary index
Explanation:
A scan operation in DynamoDB does indeed read every item in a table or secondary index. This means that when performing a scan, the operation examines every single item in the specified table or index, retrieving the data irrespective of the item's keys or any sort of filter. It does not require any specific query criteria and can potentially return a large amount of data, depending on the size of the table. This characteristic of a scan operation is crucial for understanding its impact on performance and cost. Since it processes every item, it tends to be less efficient than a query, which retrieves items based on specific key conditions and can narrow down the search significantly. Additionally, scans are limited to one table or one secondary index at a time, meaning they cannot pull data from multiple tables simultaneously. While scans can utilize filters to reduce the amount of data returned, they do not operate based on keys like queries do; rather, they can return items regardless of their keys unless additional conditions are applied.
Question 1
Exam overview

About this Exam

Are you ready to validate your technical expertise in developing and maintaining applications on the AWS Cloud? The AWS Certified Developer Associate (DVA-C02) certification is designed for professionals who possess significant experience developing and maintaining cloud-based applications. This prestigious credential distinguishes you as a cloud developer capable of leveraging the full potential of AWS services. Whether you are an experienced software developer looking to pivot to the cloud or an IT professional aiming to specialize in AWS application development, this certification is your gateway to demonstrating proficiency in secure, scalable, and reliable cloud solutions.

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Additional Information

What the Course Entails and Exam Details

The AWS Certified Developer Associate exam is comprehensive, testing a candidate’s ability to write, deploy, and debug cloud applications using AWS SDKs and APIs. To succeed, you must master several core domains that define modern cloud development. The curriculum and exam heavily emphasize the following key areas:

  • Development with AWS Services: You must demonstrate proficiency in developing applications using core AWS services like AWS Lambda, Amazon DynamoDB, Amazon S3, Amazon API Gateway, and AWS Step Functions. This includes understanding how to integrate these services to build robust serverless and microservices architectures.
  • AWS Security Best Practices: Security is paramount in the AWS Cloud. The exam requires deep knowledge of implementing security measures, including IAM roles and policies, encryption (at-rest and in-transit), and securing application data using AWS KMS.
  • Deployment and DevOps: Understanding continuous integration and continuous delivery (CI/CD) pipelines is critical. You must be familiar with AWS developer tools such as AWS CodeCommit, AWS CodePipeline, AWS CodeBuild, and AWS CodeDeploy to automate deployment processes effectively.
  • Monitoring, Troubleshooting, and Optimization: A certified developer must be able to monitor application performance and troubleshoot issues. This domain covers using Amazon CloudWatch for monitoring and logging, AWS X-Ray for tracing requests, and optimizing application performance for scale and cost.
  • Refactoring and Modernization: You may encounter scenarios requiring you to refactor monolithic applications into microservices or modernize existing applications to take advantage of cloud-native features and managed services.

The exam validates your ability to write code that interacts with AWS services, utilize containers (Amazon ECS, EKS), and understand serverless computing patterns.

 

What to Expect in the Final Exam

The AWS Certified Developer Associate (DVA-C02) exam presents a rigorous assessment of your skills. It is crucial to understand the exam format and requirements before scheduling your test.

  • Exam Format: The exam consists primarily of multiple-choice and multiple-response questions. Multiple-choice questions have one correct response and three incorrect distractors. Multiple-response questions have two or more correct responses out of five or more options.
  • Number of Questions: Candidates are typically required to answer 65 questions within the allotted time.
  • Time Limit: You will have 130 minutes (2 hours and 10 minutes) to complete the examination. This includes time for reviewing your answers and a brief non-disclosure agreement before the exam begins.
  • Passing Score: The scaled score for the AWS Certified Developer Associate exam ranges from 100 to 1000. The minimum passing score is 720. You must achieve this score or higher to earn the certification.
  • Exam Delivery: The exam is administered via computer-based testing at authorized Pearson VUE testing centers worldwide. Alternatively, candidates can choose to take the exam online through Pearson VUE’s OnVUE proctored service, which allows you to take the exam securely from your home or office.
  • Rules and Policies: The exam is strictly proctored. For online proctored exams, a reliable internet connection, webcam, and microphone are required. You must adhere to strict rules regarding a clear workspace, absence of unauthorized materials, and continuous monitoring during the testing session.

 

How to Study and Exam Centers

Preparing for the AWS Certified Developer Associate exam requires a structured and strategic approach. Combining theoretical knowledge with hands-on experience is the most effective study strategy.

  • Leverage Official AWS Training: Start with the official AWS Certified Developer Associate Exam Readiness training course available digitally on AWS Skill Builder. This course provides an in-depth review of the exam domains and question styles.
  • Hands-on Experience (Crucial): Theory alone is insufficient. You must actively use the AWS Management Console and the AWS CLI. Build applications using AWS services covered in the exam. Practice deploying serverless applications with AWS SAM (Serverless Application Model), setting up CI/CD pipelines, and configuring CloudWatch alarms. Utilize the AWS Free Tier to gain this experience cost-effectively.
  • Utilize Practice Exams: Taking a high-quality AWS Certified Developer Associate Practice Exam is one of the best ways to prepare. Practice exams help you familiarize yourself with the question format, manage your time effectively, and identify knowledge gaps. Look for practice tests that offer detailed explanations for both correct and incorrect answers, simulating the actual exam environment.
  • Study Guides and Whitepapers: Read the official AWS Certification Exam Guide and relevant AWS whitepapers, such as Overview of Amazon Web Services, Practicing Continuous Integration and Continuous Delivery on AWS, and Serverless Architectures with AWS Lambda.
  • Schedule the Exam: When you are consistently scoring above 80% on your practice exams, you are likely ready. Visit the AWS Training and Certification website to locate an authorized Pearson VUE testing center near you or to register for the online proctored exam.

 

Job Opportunities from the Course

Achieving the AWS Certified Developer Associate certification significantly enhances your marketability and unlocks a variety of high-demand cloud computing roles. This certification demonstrates that you possess the specific technical skills required to build modern applications on AWS, making you a valuable asset to employers.

The following career paths and job titles are directly relevant to individuals holding this certification:

  • AWS Cloud Developer
  • Software Engineer (Cloud)
  • Cloud Application Architect
  • Serverless Developer
  • DevOps Engineer
  • Cloud Systems Administrator
  • Technical Solutions Architect
  • Application Support Engineer (Cloud)

This certification serves as a strong foundation for advanced AWS certifications, such as the AWS Certified DevOps Engineer – Professional or AWS Certified Solutions Architect – Professional.

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