JavaScript ES6 to ES9 Features Quiz

Mobile Computing Reviewer

• Definitions
  • Computing: The operation of computers, according to the Oxford Learner's Dictionary.
  • Mobile: Easily movable from place to place.
• Mobile Computing
  • Enables users with portable computers to maintain network connections while moving.
  • Data, voice, and video transmission is possible via wireless-enabled devices without a fixed physical link.
  • Includes devices like laptops, smartphones, tablets, and PDAs.

Mobile Hardware

• Includes mobile devices (laptops, smartphones, tablets, and PDAs).
• Features receptor media sensing and receiving signals.
• Operates in full-duplex mode, sending and receiving simultaneously.

Mobile Software

• Software running on mobile hardware (operating systems and applications).
• Enables users to operate from anywhere, incorporating wireless communication features.

Main Concepts in Mobile Computing

• Mobile Communication: Infrastructure put in place ensuring reliable seamless communication, including protocols, bandwidth, services, and portals.
  • Media is unguided/unbounded.

History of Mobile Computing (1970s - 1990s)

• 1970s: Alan Kay envisioned the portable computer "Dynabook" at Xerox PARC.
• 1981: Osborne 1, the first consumer laptop, was released, although with limitations.
• 1983: Kyocera Kyotronic was a widely used early laptop; the GriDPad was considered the first tablet.

Mobile Computing Reviewer (page 2)

• 1990s: Intel's mobile-specific processors improved battery management. PDAs (Newton MessagePad and PalmPilot) became dominant. IBM Simon was the first smartphone.
• 2000s: Microsoft introduced the Pocket PC. Apple launched the iPhone and Google introduced Android.
• 2010s: Rise of mobile operating systems like iOS and Android. Mobile payments and 4G networks became prevalent. Introduction of foldable phones and augmented reality (AR).
• 2020s: Expansion of 5G networks, AI-powered cameras, and emphasis on sustainability efforts.

Advantages & Disadvantages of Mobile Devices

• Advantages: Always with the user, internet access, cameras, microphones, free or low-cost apps.
• Disadvantages: Limited battery life, awkward input methods, platform diversity, and limited processing speed.

Top Trends in Mobile Computing

• Tailor-made experiences.
• Globalization of apps.
• Narrow target audience for specific applications (niche apps).
• Internet of Things approach (mobile apps as gateways).
• Freemium models.

Mobile Systems Reviewer (page 3)

• Mobile System Overview: Consists of mobile devices, mobile operating systems and Wireless Networks.
• Mobile Devices: Hardware like CPU, memory, storage, similar to desktops, but with lower performance.
• Mobile Operating System (Mobile OS): Platforms including iOS, Android, Windows Phone, Blackberry, etc., that manage devices' radio communication.
• Wireless Networks: Mobile devices connect to the internet and communicate through cellular networks and Wi-Fi.
• Mobile Apps: Programs for mobile devices, distributed through platforms (App Store, Google Play, etc.).

Wireless Networks

• Cellular Networks: Connects mobile devices to cell sites/base stations for internet access.

Wireless Networks (cont.)

• Wi-Fi: Local area wireless technology (2.4 GHz or 5 GHz bands). Allows communication without direct connection to a wired network, enables a cheaper deployment of local area networks (LAN). Uses WPA2 encryption for security.

Mobile Computing Reviewer (page 4)

• Mobile Cloud Computing: Combines cloud computing, mobile computing, and wireless networks. Addresses limitations in resources and computational ability by offloading processes to the cloud.
• Impact on Families and Social Life: Over-reliance on smartphones can strain family relationships, reducing quality time.
• Mobile Technology - Growth and Reach: 96% of the global population had mobile subscriptions by 2013; 7 billion subscriptions. Smartphones were 50% of sales. Mobile subscriptions expected to hit 4.5 billion by 2018. Mobile broadband is growing faster than fixed broadband.
• Performance, Energy: Optimize algorithms for better balance between battery life and performance.

Mobile Computing Reviewer (page 5)

• Health Issues: Electromagnetic radiation from heavy internet use may cause brain tumors and skin cancer. Screen emissions can cause severe eye strain and retinal damage.
• Psychological Impact: Excessive online presence reduces real-life interactions and experiences, leading to potential loneliness, self-centeredness, and trust issues.
• Impact on Families and Social Life: Over-reliance on smartphones can strain family relationships and reduce quality time.
• Internet Dangers: Children's mental and physical growth can be impacted by exposure to inappropriate content; risks of fraud, personal data leaks, potentially causing harm and stress.
• Addiction and Overdependence: Excessive use may lead to distractions, particularly whilst driving, or dependence.
• Real-Life Disconnect Emphasis on virtual interactions can diminish genuine experiences.

JavaScript Overview (page 6)

• JavaScript: A popular dynamic programming language used for building interactive websites.

JavaScript Overview (cont.)

• Capabilities and Restrictions: JavaScript can modify webpage content, handle interactions, and communicate with servers. Directly accessing files on a user's computer, interacting with the operating system, or engaging in cross-origin communication without permission is restricted.
• Core Syntax: Variables (var, let, const), data types (primitive), and dynamic typing are fundamental elements in JavaScript.

Key Objects and Methods (page 7)

• Strings: Declared with single or double quotes. Includes operations like addition, subtraction, and scientific notation.
• Numbers: Contains integers and floating-point values.
• Arrays: Collections of elements in square brackets, accessed by index.

Key Objects and Methods (cont.)

• Booleans: True or false values for conditions.
• Useful methods: innerHTML, document.getElementById(), document.write(), alert(), and console.log() are vital for output.

Advanced Concepts (page 8)

• Dynamic Execution: JavaScript code adjusts during runtime.
• Same-Origin Policy: Restricts access across domains for security purposes.

Summary (page 9)

• ECMAScript: A standard for JavaScript. Specifics about the functionality and syntax of the language.

Additional Features (page 9-12)

• Features: Modules, Template Literals, AdditionalString Methods, Array Improvements, String Padding, Promises, Generator, Sets, WeakSets, Maps, and WeakMaps.
• ES Enhancements: Key additions and improvements to JavaScript since its initial inception. (e.g., Array.prototype.flat ,Optional Catch Binding, Object.values).

Modern JavaScript Features (pages 10 - 11)

• Significant updates in recent versions of JavaScript (ES6+). Topics include: let and const, arrow functions, classes, async/await (ES8 and onwards), and more.

UI/UX (pages 12-13)

• User Experience (UX) Principles Focuses on the ease of use and the experience users have with a product. This often uses concepts like usability, affordance, and consistency.
• User Interface (UI) Principles: Visual aesthetic of a product which is part of the overall UX design.

Key Concepts in React (page 14)

• React: A JavaScript library for creating user interfaces.
• JSX: A syntax extension to JavaScript that enables writing HTML-like code.
• Components: Reusable units for UI elements, improving efficiency in building interfaces.
• Props: To pass data to components using JavaScript.
• State: Manages data within a component.

React Advantages (page 15)

• Performance, Reusable Components, Large Ecosystem, Platform Compatibility.
• Real-world Examples: Explains how React is used in social media platforms, e-commerce sites, and streaming services.