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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Testing | 7% | - Testing frameworks and assertions - Code coverage and best practices - Unit testing concepts - Test doubles and mocks |
| Topic 2: Asynchronous Programming | 13% | - Event loop and micro/macro tasks - Promises and chaining - Callbacks and callback hell - Fetch API and HTTP requests - Async/await syntax |
| Topic 3: Browsers and Events | 17% | - Browser APIs and Web Storage - Document Object Model (DOM) manipulation - Window and document object properties - Event handling, propagation, and delegation - Script loading and execution order |
| Topic 4: Objects, Functions, and Classes | 25% | - Modules and imports/exports - Decorators and advanced function patterns - Object creation, properties, and methods - Function definitions, parameters, and scope - Class syntax, inheritance, and prototypes - Closures and execution context |
| Topic 5: Server-Side JavaScript | 8% | - Node.js fundamentals and runtime - Core Node.js modules - Command-line tools and scripts - Module system and require/import |
| Topic 6: Debugging and Error Handling | 7% | - Debugging tools and breakpoints - Console methods and logging - Error types and exception handling - Defensive programming practices |
| Topic 7: Variables, Types, and Collections | 23% | - Variable declaration and initialization - Working with strings, numbers, dates, and booleans - JSON parsing and usage - Array methods and data manipulation - Truthy and falsy values - Type coercion and conversion rules |
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NEW QUESTION # 12
Which javascript methods can be used to serialize an object into a string and deserialize
a JSON string into an object, respectively?
Answer: C
NEW QUESTION # 13
Considering type coercion, What does the following expression evaluate to?
True + ) + '100 ' + null
Answer: A
NEW QUESTION # 14
A test has a dependency on database .query. During the test the dependency is replace with an called database with the method, query, that returns an array. The developer needs to verify how many times the method was called and the arguments used each time.
Which two test approaches describe the requirement?
Answer: A,D
NEW QUESTION # 15
Refer to the code snippet:
Function getAvailabilityMessage(item) {
If (getAvailability(item)){
Var msg ="Username available";
}
Return msg;
}
A developer writes this code to return a message to user attempting to register a new username. If the username is available, variable.
What is the return value of msg hen getAvailabilityMessage ("newUserName" ) is executed and getAvailability("newUserName") returns false?
Answer: A
NEW QUESTION # 16
Refer to the code below:
After running this code, which result is displayed on the console?
Answer: A
NEW QUESTION # 17
......
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