JavaScript Fundamentals

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Questions and Answers

Brendan Eich, known for inventing JavaScript, held what position after his time at Netscape Communications Corporation?

  • Senior Developer at Microsoft
  • Former CEO of Mozilla Corporation (correct)
  • Lead Architect at Apple
  • Chief Technology Officer of Google

What was the initial name given to JavaScript during its development in May 1995?

  • Netscape Script
  • ECMAScript
  • Mocha (correct)
  • LiveScript

In what year JavaScript invented?

  • 2005
  • 1995 (correct)
  • 2000
  • 1990

Besides HTML, what other web technology can JavaScript directly manipulate to change the presentation of web content?

<p>CSS (B)</p> Signup and view all the answers

How long did it take Brendan Eich to develop the first version of JavaScript?

<p>Roughly 10 days (D)</p> Signup and view all the answers

In the context of web development, what is the primary role of JavaScript?

<p>To add interactivity and dynamic behavior to a webpage. (C)</p> Signup and view all the answers

Which of the following is a fundamental capability that JavaScript enables for web pages?

<p>Handling user interactions and modifying the DOM. (C)</p> Signup and view all the answers

What is the significance of understanding variables and data types when learning JavaScript?

<p>They allow you to store and manipulate data within your JavaScript programs. (C)</p> Signup and view all the answers

When writing JavaScript code, which of the following actions is a key part of the development process?

<p>Executing the code to observe its behavior and troubleshoot issues. (B)</p> Signup and view all the answers

What is the purpose of using output methods in JavaScript, such as console.log()?

<p>To display information or debugging messages to the developer. (B)</p> Signup and view all the answers

A JavaScript engine's primary role involves converting code into an understandable format. Which data structure is commonly used for this purpose?

<p>Abstract Syntax Tree (AST) (B)</p> Signup and view all the answers

Besides parsing, what is another key task performed by modern JavaScript engines to optimize performance?

<p>Compilation to an intermediate form (A)</p> Signup and view all the answers

After compiling JavaScript code, what does the JavaScript engine primarily do next?

<p>Executes the compiled code (B)</p> Signup and view all the answers

Which of the following is NOT a common task performed by a JavaScript engine during execution?

<p>Managing server infrastructure (C)</p> Signup and view all the answers

Which company developed the JavaScript engine used in Google Chrome?

<p>Google (B)</p> Signup and view all the answers

Which browser is associated with the SpiderMonkey JavaScript engine?

<p>Mozilla Firefox (C)</p> Signup and view all the answers

Based on current trends, in what area is JavaScript NOT commonly used?

<p>Operating System Kernels (D)</p> Signup and view all the answers

What is the primary purpose of an Integrated Development Environment (IDE)?

<p>To help programmers develop software code efficiently (C)</p> Signup and view all the answers

What is the primary role of a JavaScript engine?

<p>To execute JavaScript code and convert it into machine code. (C)</p> Signup and view all the answers

Besides web browsers, where else can JavaScript engines be utilized?

<p>In some servers and a variety of apps. (B)</p> Signup and view all the answers

What role does JavaScript play in web development alongside HTML and CSS?

<p>JavaScript is a core technology of the web responsible for webpage behavior, with HTML for structure and CSS for styling. (B)</p> Signup and view all the answers

What is the significance of Node.js in the context of JavaScript?

<p>It is the most popular runtime system for non-browser usage of JavaScript. (A)</p> Signup and view all the answers

A developer wants to create a dynamic single-page application. Which technology is essential for achieving this?

<p>JavaScript for handling interactivity and data manipulation (C)</p> Signup and view all the answers

Which functionality would need JavaScript to be implemented?

<p>Handling form validation on the client-side before submission (D)</p> Signup and view all the answers

A web developer aims to improve the responsiveness of a website. Which of the following actions directly involves using JavaScript?

<p>Adding animations and interactive elements (D)</p> Signup and view all the answers

A web development team is deciding on the core technologies for a new project. They want to ensure broad compatibility and dynamic content updates. Which set of technologies would best achieve this?

<p>HTML, CSS, and JavaScript (D)</p> Signup and view all the answers

How does an integrated development environment (IDE) primarily contribute to software development?

<p>By consolidating software editing, building, testing, and packaging into one application. (A)</p> Signup and view all the answers

What is the primary function of the <script> tag in HTML when incorporating JavaScript?

<p>To embed or link JavaScript code within an HTML file. (B)</p> Signup and view all the answers

What is the purpose of console.log() in JavaScript development?

<p>To display output and debugging information in the browser's developer console. (D)</p> Signup and view all the answers

In web development, what role do developer tools typically play?

<p>They are used for debugging JavaScript code and viewing output, among other tasks. (A)</p> Signup and view all the answers

When creating a flowchart for web page development, what is the initial, critical step?

<p>Defining the goals and purpose of the website. (D)</p> Signup and view all the answers

Why is defining the target audience important in the planning phase of website development?

<p>It helps in tailoring the content, design, and functionality to meet user needs and preferences. (D)</p> Signup and view all the answers

Which activity is NOT typically part of the planning phase in website development?

<p>Writing the JavaScript functions. (B)</p> Signup and view all the answers

A development team is using an IDE for a large project. How does this affect the typical workflow?

<p>It centralizes tasks like coding, testing, and building into an integrated environment, improving efficiency. (B)</p> Signup and view all the answers

Flashcards

What is JavaScript?

A programming language that enables interactive features on websites.

Where does JavaScript code run?

Client-side, within a web browser.

What can you do with JavaScript?

Add interactivity, handle events, and modify webpage content.

Lesson Objectives

To understand JavaScript's role, execute code, utilize variables, data types, and output methods.

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Variables

Named storage locations that hold values.

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Who created JavaScript?

Created by Brendan Eich in 1995 at Netscape.

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Who is Brendan Eich?

American computer programmer and former CEO of Mozilla Corporation.

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What were JavaScript's original names?

Mocha -> LiveScript -> JavaScript

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What can JavaScript manipulate?

Modifying HTML and CSS codes.

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What is JavaScript capable of?

Performing calculations and logical checks.

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Most Popular Language

Currently the most popular programming language.

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Dynamic Website

JavaScript allows for the creation of websites that respond to user interactions without needing to reload the page.

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JavaScript (JS)

A programming language used with HTML and CSS to create interactive websites. It runs on the client side.

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JavaScript Usage

JavaScript is used on almost every website for creating interactive elements.

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JavaScript Engine

Web browsers have a special engine that runs JavaScript code.

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Node.js

A system that allows JavaScript to run outside of web browsers, commonly used for server-side applications.

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JavaScript Interpreter

A program that reads, translates, and executes JavaScript code, converting it into machine code.

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Browser

Browser JavaScript interpreter.

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JavaScript Engine: Parsing

Breaking down code into a readable format for the engine.

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JavaScript Engine: Compilation

Transforms code into a more efficient form for execution.

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JavaScript Engine: Execution

Running the compiled code to perform actions.

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Popular JavaScript Engines

Google, Apple, Mozilla Firefox, Microsoft Edge.

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JavaScript Today

Mobile applications, real-time networking, and games.

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Integrated Development Environment (IDE)

A software application that helps programmers develop software code efficiently.

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What is 106,000 to 138,886 $?

A real salary for Javascript Developers.

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<script> tag

A tool for writing JavaScript code directly within an HTML file.

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console.log()

A function that displays information in the browser's developer console.

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Developer Tools

A tool used for debugging JavaScript code and viewing output.

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Flowchart for Web Page Building

Helps visually organize the structure of the website development process.

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Planning Phase (Website)

Defining the website's goals and identifying the intended users.

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Define Website Purpose

The initial stage in website creation, defining objectives and target audience.

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Identify Key Phases

Divide the website creation into distinct stages for organized development.

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Study Notes

REVIEWER FOR 3RD QUARTER EXAMINATION IN INQUIRIES,

INVESTIGATION AND IMMERSION

KEY CONCEPTS & DEFINITIONS:

1. Research - A systematic investigation for information.

2. Inquiry - Seeking truth, information, or knowledge.

3. Brainstorming Phases - Idea generation and evaluation.

4. Conceptual Framework - An analytical tool with several

variations and contexts.

5. Research Hypothesis - A tentative answer to the research

question guiding the study.

6. Statement of the Problem - A specific and accurate synopsis of

the overall purpose of the study.

7. Operational Definition - Defining a term in the context of its use

in research.

8. Scope and Delimitation - Sets the boundaries and parameters of

the problem inquiry.

9. Theoretical Framework - Related theories and principles

established by authorities.

10. Hypothesis - Predicting relationships among variables in

the study.

REVIEWER: WRITING PROCESS & RESEARCH CONCEPTS

WEEK 2 & 3: STAGES OF THE WRITING PROCESS

1. Prewriting – Brainstorming, outlining, and gathering ideas.

2. Drafting – Writing the first version without focusing too much on

perfection.

3. Revising – Improving clarity, structure, and flow.

4. Editing – Checking grammar, punctuation, and spelling.

5. Publishing – Sharing the final version.

WEEK 4: RESEARCH WRITING

• Statement of the Problem

o Defines the research purpose and direction.

o Should be concise, clear, and specific.

o Examples:

▪ "The aim of this study is to determine..."

▪ "This project aims to explore..."

• Research Questions

o Two types:

1. General Problem – Broad research focus.

2. Specific Problems – Researchable vs. Non-researchable.

• Hypothesis

o A testable statement predicting the relationship between

variables.

o Types:

▪ Null Hypothesis (H0): No effect or relationship.

▪ Alternative Hypothesis (H1): Suggests an effect or

relationship.

o Example:

▪ H0: Taking aspirin daily does not affect heart attack risk.

▪ H1: Taking aspirin daily reduces heart attack risk.

• Conceptual Framework

o A structured approach to research.

o Can be a diagram or narrative.

o Steps to Create:

1. Conduct a literature review.

2. Identify key variables.

3. Create a flowchart or model.

4. Write a narrative explanation.

5. Revise as needed.

• Asking Questions for Research

o Helps in acquiring knowledge and solving problems.

o Examples:

▪ If you could ask one person (dead or alive) a question, what

would it be?

▪ If you could ask your future self something, what would it

be?

WEEK 5: SIGNIFICANCE OF THE STUDY & DEFINITION OF TERMS

• Significance of the Study

o Explains how the research contributes to knowledge.

o Identifies who benefits from the research.

o Example: “This study benefits educators by improving teaching

strategies for online learning.”

• Definition of Terms

o Two Types:

1. Conceptual Definition – Dictionary/universal meaning.

2. Operational Definition – How the researcher applies it in

the study.

o Guidelines:

▪ Define terms that have special meanings in the study.

▪ Cite sources for definitions from books, encyclopedias, etc.

▪ Clearly spell out acronyms.

WEEK 6-7: REVIEW OF RELATED LITERATURE (RRL) & CITATION

• Review of Related Literature (RRL)

o A summary of past research relevant to your topic.

o Ensures that your study builds on existing knowledge.

• Review of Related Studies (RRS)

o Summarizes past research findings.

• Review of Related Literature and Studies (RRLS)

o Combines both RRL & RRS.

Steps in Writing an RRL

1. Formulate themes – Use variables or the problem statement.

2. Ensure varied sources – Use both local and international sources.

3. Assign citations – Distribute research tasks among group members.

4. Check main points – Paraphrase properly to avoid plagiarism.

5. Compile information – Use transitional words to organize ideas.

In-Text Citation Guidelines

1. By Author – (Smith, 2020)

2. By Topic – Research on climate change suggests... (Jones, 2019).

3. Chronological – Earlier studies (Brown, 2005) vs. later research (Davis,

2021).

Listing References (APA Style)

• Book: Author, A. A. (Year). Title of book. Publisher.

• Journal: Author, A. A. (Year). Title of article. Journal Name,

Volume(Issue), Pages.

• Website: Author, A. A. (Year). Title of webpage. Website Name. URL

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