Mobile Computing Quiz

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Questions and Answers

Which term refers to the infrastructure that allows reliable communication in mobile computing?

Mobile Networking

Mobile Communication (correct)

Mobile Software

Mobile Hardware

What does mobile hardware include?

Portable computers and devices (correct)

Programs running on devices

Telecommunication services

Wireless protocols

Which of the following statements about mobile software is true?

It only supports voice communication.

It includes programs that cannot operate wirelessly.

It enables users to operate devices from any location. (correct)

It refers to the physical devices used for communication.

What key innovation did Alan Kay envision during the 1970s?

The portable computer Dynabook Signup and view all the answers

Which mobile device was recognized as the first consumer laptop released in 1981?

Osborne 1 Signup and view all the answers

What does the term 'full-duplex mode' refer to in mobile communication?

Simultaneous sending and receiving of signals. Signup and view all the answers

Mobile computing is primarily defined by its ability to do what?

Enable operation while moving without a physical connection. Signup and view all the answers

Which of these features is NOT typically associated with mobile software?

Connection protocols for wired networks Signup and view all the answers

What is the expected coverage of LTE globally by 2018?

60% Signup and view all the answers

Which technology is primarily responsible for faster data rates in 2G communications?

EDGE Signup and view all the answers

Which of the following devices primarily enables users to update documents and surf the web?

Tablets Signup and view all the answers

What is a primary challenge of mobile cloud computing?

Energy management Signup and view all the answers

What percentage of the global population had mobile subscriptions by 2013?

96% Signup and view all the answers

Which mobile technology represents the first generation of communication?

1G Signup and view all the answers

What was the expected number of mobile broadband subscriptions by 2018?

4.5 billion Signup and view all the answers

What aspect of mobile technology enables users to work from anywhere?

Cloud computing Signup and view all the answers

What is one of the capabilities of JavaScript?

Handle user interactions like clicks Signup and view all the answers

How do JavaScript variables differ from some programming languages?

They can hold different data types dynamically Signup and view all the answers

What is the purpose of the await() operator in an asynchronous function?

To pause execution until a Promise is resolved Signup and view all the answers

Which type of data would the following code represent: `let data = 42; data = 'Hello';`?

Dynamic typing Signup and view all the answers

Which of the following is true about JavaScript and Java?

They are unrelated except for superficial syntax similarities Signup and view all the answers

Which ES6 feature makes it easier to check if particular values are present in an array?

Array.prototype.includes() Signup and view all the answers

What is the primary purpose of the spread operator in ES7?

To clone objects or merge arrays Signup and view all the answers

What method in JavaScript is primarily used for communicating with servers?

AJAX or fetch API Signup and view all the answers

What does the `const` keyword do when declaring a variable?

Creates a variable that cannot be reassigned Signup and view all the answers

Which of the following features allows for handling asynchronous iterations in JavaScript?

for-await-of loop Signup and view all the answers

Which of the following data types is NOT considered a primitive type in JavaScript?

Array Signup and view all the answers

What does the exponential operator '**' accomplish in JavaScript?

It raises a number to the power of another number Signup and view all the answers

How are JavaScript scripts typically linked to HTML pages?

Embedded within a <code><script></code> tag or linked as an external file Signup and view all the answers

What is a significant feature introduced in ES9 related to handling promises?

Asynchronous iterations with async iterators Signup and view all the answers

Which of the following is NOT an update introduced in ES8?

Arrow functions Signup and view all the answers

What is a potential health issue associated with mobile computing?

Electromagnetic radiation may lead to brain tumors Signup and view all the answers

Which feature allows the use of default parameters in function definitions?

Default function arguments Signup and view all the answers

How may excessive smartphone use impact psychological well-being?

It can lead to feelings of loneliness and self-centeredness Signup and view all the answers

What is a consequence of over-reliance on smartphones in family settings?

Strained relationships and reduced quality time Signup and view all the answers

What type of addiction may arise from excessive mobile computing?

Overdependence on smartphones leading to distractions Signup and view all the answers

What impact can mobile internet usage have on children?

Negative effects on mental and physical growth from inappropriate content Signup and view all the answers

Which of the following is a common physical problem associated with excessive smartphone use?

Increased risk of developing carpal tunnel syndrome Signup and view all the answers

What can alleviate some of the drawbacks of mobile computing?

Self-discipline and informed usage Signup and view all the answers

Which of the following is true about the impact of mobile computing on real-life interactions?

It reduces the depth of real-life experiences and interactions Signup and view all the answers

What is the primary focus of low-fidelity sketches in UX design?

Minimizing user frustration Signup and view all the answers

What year was React originally created?

2011 Signup and view all the answers

What does JSX stand for in React?

JavaScript Syntax Extension Signup and view all the answers

Which of the following describes the role of props in React?

They are used to pass data to components Signup and view all the answers

What was one of the challenges that React aimed to address?

Managing dynamic web applications Signup and view all the answers

What feature does React Native provide?

Mobile app development Signup and view all the answers

Which major update introduced React Fiber?

2017 Signup and view all the answers

Which of the following best describes components in React?

Reusable, self-contained UI units Signup and view all the answers

Study Notes

Mobile Computing Reviewer

Computing is the operation of computers, according to the Oxford Learner's Dictionary.
Mobile means something or someone that can move easily and quickly from place to place.
Mobile computing users with portable computers still have network connection while moving.
Mobile computing technology that allows data, voice, and video transmission via a computer or other wireless-enabled device without needing to be connected to a fixed physical link
Mobile hardware includes mobile devices such as laptops, smartphones, tablets, and PDAs.
Mobile devices have receptor media that senses and receives signals; they operate in full-duplex mode and send and receive signals simultaneously.
Mobile software is the actual program that runs on mobile hardware, including operating systems and applications.

History of Mobile Computing

1970s - 1980s: Alan Kay envisioned the portable computer Dynabook at Xerox PARC.
1981: Osborne 1, the first consumer laptop was released but had limitations.
1983: Kyocera Kyotronic became a widely-used early laptop, followed by GriDPad, considered the first tablet.

Main Concepts in Mobile Computing

Mobile communication refers to the infrastructure in place to ensure reliable communication using protocols, services, bandwidth, and portals. The media is unguided/unbounded.

Mobile System Overview

A mobile system consists of mobile devices, mobile operating systems (such as IOS, Android, Windows Phone, Blackberry, etc.) and wireless networks. Devices may also run a secondary real-time OS for managing radio communications.
Mobile devices have hardware such as CPUs, memory and storage, operating similarly to desktop components but with lower performance.

Wireless Networks

Cellular networks connect mobile devices to cell sites or base stations. They require communication through base stations.
Wi-Fi is a local area wireless technology operating in 2.4 GHz or 5 GHz bands that enables cheaper deployment of local area networks (LANs). It uses WPA2 encryption for security.

Mobile Apps and Platforms

Mobile apps are programs for smartphones and tablets. Popular platforms include App Store, Google Play, Windows Phone Store, and BlackBerry App World.

Optimizations in Mobile Systems

Mobile devices have constraints in energy, performance, networking speed, and resources (e.g., storage, CPU). Solutions involve optimization algorithms balancing these factors.

Mobile Cloud Computing

Combines cloud computing, mobile computing, and wireless networks.
Addresses limitations like resources and computational capabilities by offloading processes to the cloud.
Challenges include latency, energy management, security, and privacy.

Mobile Technology - Growth and Reach

Generations of mobile technology evolution include 1G (1981, first generation introducing analog communication) and 2G (GSM), developed by the European Telecommunications Standards Institute.

Mobile Market Statistics

96% of the global population had mobile subscriptions by 2013.
7 billion subscriptions.
Smartphones made up 50% of mobile sales. Smartphone subscriptions are expected to reach 4.5 billion by 2018. Mobile broadband is growing faster than fixed broadband.

Global Mobile Web Traffic (2019)

Based on the share of mobile operating systems in global web requests.
Highlights demand for robust smart devices driving competition among manufacturers.

The Essence of Mobile Computing

Work from anywhere using iPads, tablets, smartphones, and notebooks. Accessing sales reports and market forecasts is possible through mobile applications. The constant demand for state-of-the-art applications fuels innovation.

Advantages of Mobile Computing

Location flexibility, saving time and expenses.

Disadvantages of Mobile Computing

Health issues such as electromagnetic radiation from heavy internet usage that may cause brain tumors and skin cancer, and eye strain.
Overuse and reliance on mobile devices can impact family relationships and mental health, particularly amongst children.

Key Takeaway

Mobile computing offers unmatched flexibility and efficiency, but self-discipline is needed to reduce its drawbacks. A balance and informed use maximize benefits while minimizing risks.

JavaScript Overview and Key Concepts

JavaScript is a programming language for web pages that enables interactivity.
It runs directly in web browsers and on servers using Node.js.
It's used for building dynamic and interactive websites.
It's a lightweight, object-oriented, and interpreted programming language.

Key Objects and Methods

Strings are used in the form of '' or ""
Numbers inclues integers and floating points.
Booleans are used for conditional statements involving true or false.

Modules

Used for better code organization and reusability.

JavaScript Updates

Standard for Office Open XML (OOXML).
Standard for JSON (JavaScript Object Notation).
Overview of JS updates

MIDTERMS

ECMAScript 1 (1997): established foundational syntax and semantics.
ECMA or European Computer Manufacturers Association is an industry association.

Other ES Features and Updates

ECMAScript 3 (1999): enhancements such as support for regular expressions and better string manipulation, introduced try-catch statements for error handling.
ECMAScript 4 (Abandoned in 2008): planned major advancements like classes, modules, and strong typing, but disagreements led to abandonment.
ECMAScript 5 (2009): critical update with features like JSON support and strict mode, introduced new array methods such as forEach and map.
ECMAScript 6 (2015): key features include arrow functions, classes, template literals, and promises for handling asynchronous operations.
ECMAScript 7 (2016): introduced the includes() method and the exponential operator (**).
ECMAScript 8 (2017): introduced the spread operator, async functions, and object.values objects.
ECMAScript 9 (2018): introduced more improvements to asynchronous iterations, use for-await-of with promises, and the spread operator for cloning objects.
ECMAScript 10 (2019): introduced Array.prototype.flat, and string methods trimStart, and trimEnd. Updates also included to Function.prototype.toString(), and Optional Catch Binding.
ECMAScript 11 and beyond: Various new features introduced after ES10 (2019). These updates continue to enhance JavaScript features.

UI/UX

User experience (UX) is the overall experience of users when interacting with a product, system, or service.
UX includes understanding user needs, preferences and pain points.
User experience (UX) design methods include a wide variety of research techniques.
User research methods include surveys, interviews, and observations.
Personas and user stories help design teams empathize with users, using fictional representations of target users to understand their needs
Visual design impacts the user’s perception of, and engagement with, a product. Methods and considerations include color selection, typography & layout principles.

Information Architecture

Organize and label content in a way that users can easily navigate.
Understanding how users find and seek information is vital for good information architecture.

Interaction Design

Create intuitive controls for user engagement, including buttons, sliders, and navigational elements.
Designing interactions such as swiping or tapping for mobile devices.

HCI

Human Computer Interaction (HCI) is the study of how people interact with computers and to what extent computers are designed for successful interaction with humans.

React: Comprehensive Overview

React is a JavaScript library for building user interfaces. It was developed by Facebook in 2011 and open-sourced in 2013. React is component-based, declarative, and efficient to use.
Key concepts of React include JSX, components, props, and state.
Challenges before React, like managing dynamic web applications, included poor performance when implementing them.

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Description

Test your knowledge on mobile computing infrastructure, hardware, software, and historical innovations. This quiz covers essential concepts including communication modes, LTE coverage, and challenges in mobile cloud computing. Dive in to see how much you know about the evolution and features of mobile technology!