JS-Dev-101 Salesforce Certified JavaScript Developer Exam Topics and Questions
These Salesforce Certified JavaScript Developer (JS-Dev-101) exam topics are organized according to official exam domains to help candidates quickly verify coverage and focus on assessment rather than theory. Each domain is paired with topic-wise JS-Dev-101 sample questions that reflect how objectives are tested in the actual exam. This structure enables efficient review, targeted self-assessment, and rapid identification of weak areas when preparing for the Salesforce Certified JavaScript Developer certification exam.
Let's Practice Free Salesforce JS-Dev-101 Questions Aligned with Official Exam Topics
Exam Contains: 7 Topics
Topic Content
Variables, Types, and Collections encompasses the fundamental skills needed to work with data in programming. You will be expected to write code that creates and initializes variables correctly based on given scenarios, and utilize strings, numbers, and dates effectively to meet specific business requirements. Understanding type coercion and recognizing how it affects code behavior is essential, as is the ability to distinguish between truthy and falsey evaluations in conditional statements. You must demonstrate proficiency in data manipulation techniques using arrays,...
See
More
Sample Questions for Topic 1 : Variables, Types, and Collections
Q1
You need to remove the last element from an array of customer IDs and then add a new customer ID to the end of the array. Given the array: let customerIds = ['C001', 'C002', 'C003'];, which code snippet correctly performs both operations?
Topic Content
Objects, Functions, and Classes encompasses the ability to select appropriate function implementations based on specific business requirements, apply object-oriented principles to address practical business challenges, and utilize class-based architecture to design scalable solutions. Candidates must demonstrate proficiency in consuming JavaScript modules by providing practical usage examples and understanding decorator patterns through real-world application scenarios. Additionally, the topic requires analyzing code segments to determine variable scope behavior and trace execution flow through complex JavaScript structures. This foundational knowledge enables developers to...
See
More
Topic Content
Browser and Events encompasses the practical application of JavaScript event systems, including the implementation of event handlers and understanding event propagation mechanisms to fulfill specific business requirements. Students will learn to evaluate and manipulate the Document Object Model (DOM) to dynamically modify web page content and structure based on application needs. The curriculum includes hands-on experience with Browser Developer Tools to debug, investigate, and analyze code behavior in real-time environments. Additionally, learners will gain proficiency in utilizing browser-specific APIs such...
See
More
Topic Content
Debugging and Error Handling encompasses the ability to manage unexpected situations in code by implementing proper error handling techniques and utilizing debugging tools effectively. Students should be able to analyze given scenarios and apply appropriate error handling mechanisms to prevent application crashes and ensure graceful failure. Additionally, learners must demonstrate proficiency in using browser console tools and setting breakpoints to identify, trace, and resolve code issues systematically. This includes understanding how to read error messages, inspect variable values during execution,...
See
More
Topic Content
Asynchronous Programming encompasses the ability to apply asynchronous programming concepts when presented with real-world scenarios, enabling developers to write non-blocking code that improves application performance and responsiveness. This topic requires understanding how to effectively utilize the event loop and event monitor mechanisms to manage asynchronous operations, including the ability to trace execution flow and predict outcomes in complex asynchronous workflows. Candidates must demonstrate proficiency in handling scenarios where multiple asynchronous tasks execute concurrently, understanding callback queues, microtask queues, and the...
See
More
Topic Content
Server Side JavaScript encompasses the ability to evaluate and select appropriate Node.js implementations based on specific project scenarios and requirements. This includes understanding when to utilize particular Node.js command-line interface commands to accomplish development tasks efficiently. Candidates must demonstrate knowledge of core Node.js modules and be capable of recommending suitable libraries and frameworks that align with given requirements. Additionally, learners should be able to differentiate between various Node.js package management solutions and determine which approach best fits the project's needs....
See
More
Topic Content
Unit Testing Effectiveness and Improvement: This topic focuses on analyzing existing unit tests paired with code blocks to identify weaknesses and gaps in test coverage. Students will learn to recognize common testing pitfalls such as insufficient assertions, missing edge cases, inadequate input validation testing, and lack of error condition coverage. The objective is to develop the ability to evaluate test quality and refactor ineffective tests into robust, comprehensive test suites that thoroughly validate code behavior. Learners will practice enhancing tests...
See
More
Ready to Start Practicing?
Access all questions and start your exam preparation journey
Upgrade to Full JS-Dev-101 Exam Questions 🚀
