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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Asynchronous Programming | 13% | - Promises (creation, chaining, error handling) - Callbacks - Event loop and execution flow - Async/Await syntax - Asynchronous patterns for business requirements |
| Topic 2: Testing | 7% | - Writing and modifying unit tests - Unit testing concepts - Test effectiveness evaluation - Test coverage and reliability |
| Topic 3: Objects, Functions, and Classes | 25% | - ES6 classes and inheritance - Prototypal inheritance - Object creation and manipulation - Function declarations and expressions - Arrow functions - Variable scope and closures - Modules and decorators - Higher-order functions - Execution flow and context |
| Topic 4: Browser and Events | 17% | - DOM manipulation - Event propagation (bubbling and capturing) - Browser-specific APIs - Event handling and listeners - Browser Developer Tools usage - Interacting with forms and user input |
| Topic 5: Variables, Types, and Collections | 23% | - Truthy and falsy evaluations - Strings, numbers, and dates - Primitive and complex data types - Variable declarations and initialization - JSON parsing and manipulation - Arrays and collections - Type coercion and conversion |
| Topic 6: Server Side JavaScript | 8% | - CLI commands - Node.js fundamentals - Package management (npm) - Core Node.js modules - Server-side JavaScript implementations |
| Topic 7: Debugging and Error Handling | 7% | - Error handling techniques (try/catch/finally) - Custom error types - Breakpoints and code inspection - Console methods for debugging |
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NEW QUESTION # 113
A developer wants to use a module called DataPrettyPrint. This module exports one default function called printDate ().
How can a developer import and use the printDate() function?
A)
B)
C)
D)
Answer: A
NEW QUESTION # 114
Refer to the code below:
function foo () {
const a =2;
function bat() {
console.log(a);
}
return bar;
}
Why does the function bar have access to variable a ?
Answer: A
NEW QUESTION # 115
Refer to the following code that imports a module named utils:
import (foo, bar) from '/path/Utils.js';
foo() ;
bar() ;
Which two implementations of Utils.js export foo and bar such that the code above runs without error?
Choose 2 answers
Answer: A,D
NEW QUESTION # 116
A developer has a web server running with Node.js. The command to start the web server is node server.js. The web server started having latency issues. Instead of a one second turnaround for web requests, the developer now sees a five second turnaround.
Which command can the web developer run to see what the module is doing during the latency period?
Answer: D
NEW QUESTION # 117
Universal Containers (UC) just launched a new landing page, but users complain that the website is slow. A developer found some functions any that might cause this problem. To verify this, the developer decides to execute everything and log the time each of these three suspicious functions consumes.
Which function can the developer use to obtain the time spent by every one of the three functions?
Answer: A
NEW QUESTION # 118
......
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