Sailfish OS Interview Questions and Answers Guide
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A Survey on Architectures of Mobile Operating Systems: Challenges and Issues
International Journal of Research Studies in Computer Science and Engineering (IJRSCSE) Volume 2, Issue 3, March 2015, PP 73-76 ISSN 2349-4840 (Print) & ISSN 2349-4859 (Online) www.arcjournals.org A Survey on Architectures of Mobile Operating Systems: Challenges and Issues Prof. Y. K. Sundara Krishna1 HOD, Dept. of Computer Science, Krishna University Mr. G K Mohan Devarakonda2 Research Scholar, Krishna University Abstract: In the early years of mobile evolution, Discontinued Platforms Current mobile devices are enabled only with voice services Platforms that allow the users to communicate with each other. Symbian OS Android But now a days, the mobile technology undergone Palm OS IOS various changes to a great extent so that the devices Maemo OS Windows Phone allows the users not only to communicate but also to Meego OS Firefox OS attain a variety of services such as video calls, faster Black Berry OS browsing services,2d and 3d games, Camera, 2.1 Symbian OS: This Operating system was Banking Services, GPS services, File sharing developed by NOKIA. services, Tracking Services, M-Commerce and so many. The changes in mobile technology may be due Architecture: to Operating System or Hardware or Network or Memory. This paper presents a survey on evolutions SYMBIAN OS GUI Library in mobile developments especially on mobile operating system Architectures, challenges and Issues in various mobile operating Systems. Application Engines JAVA VM 1. INTRODUCTION Servers (Operating System Services) A Mobile operating system is a System Software that is specifically designed to run on handheld devices Symbian OS Base (File Server, Kernel) such as Mobile Phones, PDA’s. -
How Ios 7 Stacks Up:Smartphone OS User Experience Shootout
How iOS 7 Stacks Up: Smartphone OS User Experience Shootout a Pfeiffer Report Benchmark Project www.pfeifferreport.com @pfeifferreport Introduction Why is it that the arrival of iOS 7 Whether we like it or not, We do not look at features, we do not smartphones have become a compare cutting-edge options and is necessarily a momentous software game. Take any recent gadgets, we only look at aspects event for the smartphone top-of-the-line smartphone, and you that have a direct impact on the are likely to get a well-designed, fast, day-to-day user experience of an market? Simple: Unlike any other pleasant to use bit of hardware: fluid average, non-technical user. operating system out there, it will operation, responsive interaction, fast The aspects we have surveyed and be in the hands of millions or tens graphics. The difference of user rated are the following: experience, therefore, stems of millions of users within a few cognitive load, efficiency, almost exclusively from the customization, as well as user days after its launch. operating system, the user interface experience friction. Based on And that will make it a force to be design, the application integration, the the results from these benchmarks overall coherence. we have then established an overall reckoned with. This report compares the five Mobile Operating System User major mobile operating systems Experience Index presented at the * The question is, of course: in use today: iOS 7, iOS 6, Android , end of this document. Windows Phone 8, and Blackberry 10, The benchmarks are based on the How good is it really? and rates them in terms of user Pfeiffer Consulting Methodology experience. -
Mobile Platform Security Architectures: Software
Lecture 3 MOBILE SOFTWARE PLATFORM SECURITY You will be learning: . General model for mobile platform security Key security techniques and general architecture . Comparison of four systems Android, iOS, MeeGo (MSSF), Symbian 2 Mobile platforms revisited . Android ~2007 . Java ME ~2001 “feature phones”: 3 billion devices! Not in smartphone platforms . Symbian ~2004 First “smartphone” OS 3 Mobile platforms revisited . iOS ~2007 iP* devices; BSD-based . MeeGo ~2010 Linux-based MSSF (security architecture) . Windows Phone ~2010 . ... 4 Symbian . First widely deployed smartphone OS EPOC OS for Psion devices (1990s) . Microkernel architecture: OS components as user space services Accessed via Inter-process communication (IPC) 5 Symbian Platform Security . Introduced in ~2004 . Apps distributed via Nokia Store Sideloading supported . Permissions are called ‘capabilities’, fixed set (21) 4 Groups: User, System, Restricted, Manufacturer 6 Symbian Platform Security . Applications identified by: UID from protected range, based on trusted code signature Or UID picked by developer from unprotected range Optionally, vendor ID (VID), based on trusted code signature 7 Apple iOS . Native application development in Objective C Web applications on Webkit . Based on Darwin + TrustedBSD kernel extension TrustedBSD implements Mandatory Access Control Darwin also used in Mac OS X 8 iOS Platform Security . Apps distributed via iTunes App Store . One centralized signature authority Apple software vs. third party software . Runtime protection All third-party software sandboxed with same profile Permissions: ”entitlements” (post iOS 6) Contextual permission prompts: e.g. location 9 MeeGo . Linux-based open source OS, Intel, Nokia, Linux Foundation Evolved from Maemo and Moblin . Application development in Qt/C++ . Partially buried, but lives on Linux Foundation shifted to HTML5- based Tizen MeeGo -> Mer -> Jolla’s Sailfish OS 10 MeeGo Platform Security . -
Qml Controls from Scratch
CREATING QML CONTROLS FROM SCRATCH Chris Cortopassi Table of Contents Introduction ......................................................................................... 3 Part 0: Getting Started ......................................................................... 4 Part 1: Button ....................................................................................... 6 Part 2: CheckBox and RadioButton ...................................................... 8 Part 3: Switch ...................................................................................... 10 Part 4: Slider ........................................................................................ 12 Part 5: ScrollBar ................................................................................... 14 Part 6: ProgressBar.............................................................................. 15 Part 7: Spinner ..................................................................................... 16 Part 8: Dialog ....................................................................................... 17 Part 9: PageDots .................................................................................. 19 Part 10: Tabs ....................................................................................... 21 Part 11: Table ...................................................................................... 23 Part 12: TimePicker ............................................................................. 25 Part 13: DatePicker ............................................................................. -
State of the Enterprise Tablet Market
A SUPPLEMENT TO MOBILE ENTERPRISE MAGAZINE • Impact of BYoD State of the Enterprise on TaBlets • acceptance Tablet Market In the EnterprIse The New Age of True Mobile Computing • OS TrenDs The major technology trends of cloud computing and tablets are intersecting to upset the balance of legacy computing environments. RESEARCH PaRTNER SPONSORED BY STATE OF THE ENTERPRISE TABLET MARKET TABLE OF State of the Enterprise Tablet Market CONTENTS IN ADDITIon to ‘BYOT’— 1 IN 5 COMPANIES ISSUING TABLETS TO EMPLOYEES BY CHRIS HAZELTON, RESEARCH DIRECTOR MOBILE & WIRELESS, 451 RESEARCH T3 Impact of BYOD on Tablets The enterprise is experiencing Data is sourced from two recent sur- massive changes as the major veys. The first is from ChangeWave Re- T5 Corporate Demand technology trends of cloud search, a service of 451 Research, lever- for Tablets computing and tablets are inter- aging 25,000 highly qualified business, secting to upset the balance of legacy technology and medical professionals T5 Acceptance computing environments. The tablet is who are in a variety of roles in a broad in the Enterprise the perfect window into cloud services – cross section of vertical markets such as shifting computing from a single device software, telecom, healthcare, energy, T6 Use of Tablets to multiple devices based on user choice hardware, manufacturing and retail. by Role and need, with storage and processing The second source is from 451 Re- of data moving to the cloud. The cloud search’s "2012 Enterprise Mobility Sur- T8 Operating Systems enables device-independent computing, vey," which was done in partnership Trends with access to content from anywhere, with Mobile Enterprise. -
Meego Smartphones and Operating System Find a New Life in Jolla Ltd
Jolla Ltd. Press Release July 7, 2012 Helsinki, Finland FOR IMMEDIATE RELEASE MeeGo Smartphones and Operating System Find a New Life in Jolla Ltd. Jolla Ltd. is an independent Finland based smartphone product company which continues the excellent work that Nokia started with MeeGo. The Jolla team is formed by directors and core professionals from Nokia's MeeGo N9 organisation, together with some of the best minds working on MeeGo in the communities. Jussi Hurmola, CEO Jolla Ltd.: "Nokia created something wonderful - the world's best smartphone product. It deserves to be continued, and we will do that together with all the bright and gifted people contributing to the MeeGo success story." Jolla Ltd. will design, develop and sell new MeeGo based smartphones. Together with international private investors and partners, a new smartphone using this MeeGo based OS will be revealed later this year. Jolla Ltd. has been developing a new smartphone product and the OS since the end of 2011. The OS has evolved from MeeGo OS using Mer Core and Qt with Jolla technology including its own brand new UI. The Jolla team consists of a substantial number of MeeGo's core engineers and directors, and is aggressively hiring the top MeeGo and Linux talent to contribute to the next generation smartphone production. Company is headquartered in Helsinki, Finland and has an R&D office in Tampere, Finland. Sincerely, Jolla Ltd. Dr. Antti Saarnio - Chairman & Finance Mr. Jussi Hurmola - CEO Mr. Sami Pienimäki - VP, Sales & Business Development Mr. Stefano Mosconi - CIO Mr. Marc Dillon - COO Further inquiries: [email protected] Jolla Ltd. -
ECE 471 – Embedded Systems Lecture 8
ECE 471 { Embedded Systems Lecture 8 Vince Weaver http://www.eece.maine.edu/∼vweaver [email protected] 26 September 2013 Announcements • HW#2 is delayed • Read chapter 11 in textbook 1 Brief Overview of the Gumstix Overo Board TODO: Put a diagram here More details after boards are distributed. 2 Coding Directly for the Hardware One way of developing embedded systems is coding to the raw hardware, as you did with the STM Discovery Boards in ECE271. • Compile code • Prepare for upload (hexbin?) • Upload into FLASH • Boots to offset 3 • Setup, flat memory (usually), stack at top, code near bottom, IRQ vectors • Handle Interrupts • Must do I/O directly (no drivers) Although if lucky, can find existing code. 4 Instead, one can use an Operating System 5 Why Use an Operating System? • Provides Layers of Abstraction { Abstract hardware: hide hardware differences. same hardware interface for classes of hardware (things like video cameras, disks, keyboards, etc) despite differing implementation details { Abstract software: with VM get linear address space, same system calls on all systems { Abstraction comes at a cost. Higher overhead, unknown timing 6 • Multi-tasking / Multi-user • Security, permissions (Linus dial out onto /dev/hda) • Common code in kernel and libraries, no need to re- invent 7 What's included with an OS • kernel / drivers { Linux definition • also system libraries { Solaris definition • low-level utils / software / GUI { Windows definition Web Browser included? • Linux usually makes distinction between the OS Kernel and distribution. OSX/Windows usually doesn't. 8 Operating Systems Types • Monolithic kernel { everything in one big address space. -
Linux Foundation to Host Meego Workgroup
Linux Foundation To Host MeeGo Workgroup New Open Source Software Platform Backed by Intel and Nokia will Power the Next Generation of Computing Devices SAN FRANCISCO, February 15, 2010 – The Linux Foundation, the nonprofit organization dedicated to accelerating the growth of Linux, today announced it will host the MeeGo project, the open source software platform for the next generation of computing devices. MeeGo combines Intel’s Moblin™ and Nokia’s Maemo projects into one Linux-based platform. MeeGo, announced today in a joint release by Intel and Nokia, will be deployed across many computing device types - including pocketable mobile computers, netbooks, tablets, mediaphones, connected TVs and in-vehicle infotainment systems, and brings together the leaders in computing and mobile communications as the project’s backers. MeeGo is designed for cross-device, cross-architecture computing and is built from the ground up for a new class of powerful computing devices. The workgroup will be hosted by the Linux Foundation as a fully open source project, encouraging community contributions in line with the best practices of the open source development model. The Linux Foundation expects MeeGo to be adopted widely by device manufacturers, network operators, software vendors and developers across multiple device types and for many organizations and developers to participate in the workgroup. “With MeeGo, you have the world’s leader in computing – Intel – uniting with the world’s leader in communications – Nokia – in a true open source project hosted at the Linux Foundation,” said Jim Zemlin, executive director at the Linux Foundation. “MeeGo has been built from the ground up for rich, mobile devices and will deliver choice to consumers without lock-in. -
A Survey Onmobile Operating System and Mobile Networks
A SURVEY ONMOBILE OPERATING SYSTEM AND MOBILE NETWORKS Vignesh Kumar K1, Nagarajan R2 (1Departmen of Computer Science, PhD Research Scholar, Sri Ramakrishna College of Arts And Science, India) (2Department of Computer Science, Assistant Professor, Sri Ramakrishna College Of Arts And Science, India) ABSTRACT The use of smartphones is growing at an unprecedented rate and is projected to soon passlaptops as consumers’ mobile platform of choice. The proliferation of these devices hascreated new opportunities for mobile researchers; however, when faced with hundreds ofdevices across nearly a dozen development platforms, selecting the ideal platform is often met with unanswered questions. This paper considers desirable characteristics of mobileplatforms necessary for mobile networks research. Key words:smart phones,platforms, mobile networks,mobileplatforms. I.INTRODUCTION In a mobile network, position of MNs has been changing due todynamic nature. The dynamic movements of MNs are tracked regularlyby MM. To meet the QoS in mobile networks, the various issuesconsidered such as MM, handoff methods, call dropping, call blockingmethods, network throughput, routing overhead and PDR are discussed. In this paper I analyse the five most popular smartphone platforms: Android (Linux), BlackBerry, IPhone, Symbian, and Windows Mobile. Each has its own set of strengths and weaknesses; some platforms trade off security for openness, code portability for stability, and limit APIs for robustness. This analysis focuses on the APIs that platforms expose to applications; however in practice, smartphones are manufactured with different physical functionality. Therefore certain platform APIs may not be available on all smartphones. II.MOBILITY MANAGEMENT IP mobility management protocols proposed by Alnasouri et al (2007), Dell'Uomo and Scarrone (2002) and He and Cheng (2011) are compared in terms of handoff latency and packet loss during HM. -
Mer: Core OS Mobile & Devices
Mer: Core OS mobile & devices Qt Developer Days - Silicon Valley 2012 Carl Symons Introduction Plasma Active chooses Mer Not just another Linux distribution Focus - device providers Where's Mer? SDKs - apps & platform Get Mer Resources Carl Symons Large company Mktg/BusDev Start-ups } Slightly geeky Grassroots LinuxFest organizer KDE News editor/promo KDE Plasma Active Mer upstream and downstream First LinuxCon September 2009 Portland Moblin is a hot topic Moblin 2.1 for phones introduced MeeGo Announced February 201 0 Moblin & Maemo merger Support for Intel Atom Desktop Summit August 11 , 2011 Berlin; Free Desktop meeting Developer orientation; ExoPCs MeeGo AppStore A real Linux OS LinuxCon - Vancouver August 1 8, 2011 Intel AppUp Developer orientation; ExoPCs MeeGo AppStore show real Linux OS; possibilities Intel AppUp Elements September 28, 2011 National developer conference Tizen announced (led by Intel and Samsung) MeeGo and Qt abandoned HTML5/CSS3 Maemo Reconstructed October 3, 2011 Mer announced The spirit of MeeGo lives on Plasma Active chooses Mer October 5, 2011 No viable alternative Lightweight Mer talent and community Performant Boot time - more than a minute to about 1 5 seconds on Atom tablet Not just another Linux MeeGo - large company dominated; closed governance Mer - Core OS only Packages Focus - Device Providers Complete world class platform for building commercial products Modern, clean Linux Easy to try; easy to port Systems, structures, processes, code to serve device providers Where's Mer? X86, ARM, MIPS NemoMobile -
Flash®, Flex®, and Air® Development for Mobile Devices
ffirs.indd ii 12/09/11 7:52 PM BEGINNING FLASH®, FLEX®, AND AIR® DEVELOPMENT FOR MOBILE DEVICES INTRODUCTION . xxi CHAPTER 1 An Introduction to Flash, Flex, and AIR . .1 CHAPTER 2 Getting Started . 35 CHAPTER 3 Building AIR Applications for Android, BlackBerry, and iOS Devices . 67 CHAPTER 4 Touch, Multitouch, and Gestures . .101 CHAPTER 5 Developing for Multiple Screen Sizes . 131 CHAPTER 6 Debugging Applications . .177 CHAPTER 7 Working with the Filesystem . 199 CHAPTER 8 Working with Data . 239 CHAPTER 9 Working with Audio and Video . 289 CHAPTER 10 Utilizing Device Features . 315 INDEX . 359 ffirs.indd i 12/09/11 7:52 PM ffirs.indd ii 12/09/11 7:52 PM BEGINNING Flash®, Flex®, and AIR® Development for Mobile Devices ffirs.indd iii 12/09/11 7:52 PM ffirs.indd iv 12/09/11 7:52 PM BEGINNING Flash®, Flex®, and AIR® Development for Mobile Devices Jermaine G. Anderson John Wiley & Sons, Inc. ffirs.indd v 12/09/11 7:52 PM Beginning Flash®, Flex®, and AIR® Development for Mobile Devices Published by John Wiley & Sons, Inc. 10475 Crosspoint Boulevard Indianapolis, IN 46256 www.wiley.com Copyright © 2012 by John Wiley & Sons, Inc., Indianapolis, Indiana Published simultaneously in Canada ISBN: 978-0-470-94815-6 ISBN: 978-1-118-19334-1 (ebk) ISBN: 978-1-118-19335-8 (ebk) ISBN: 978-1-118-19336-5 (ebk) Manufactured in the United States of America 10 9 8 7 6 5 4 3 2 1 No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of the Publisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600. -
Mobile Developer's Guide to the Galaxy
Don’t Panic MOBILE DEVELOPER’S GUIDE TO THE GALAXY U PD A TE D & EX TE ND 12th ED EDITION published by: Services and Tools for All Mobile Platforms Enough Software GmbH + Co. KG Sögestrasse 70 28195 Bremen Germany www.enough.de Please send your feedback, questions or sponsorship requests to: [email protected] Follow us on Twitter: @enoughsoftware 12th Edition February 2013 This Developer Guide is licensed under the Creative Commons Some Rights Reserved License. Editors: Marco Tabor (Enough Software) Julian Harty Izabella Balce Art Direction and Design by Andrej Balaz (Enough Software) Mobile Developer’s Guide Contents I Prologue 1 The Galaxy of Mobile: An Introduction 1 Topology: Form Factors and Usage Patterns 2 Star Formation: Creating a Mobile Service 6 The Universe of Mobile Operating Systems 12 About Time and Space 12 Lost in Space 14 Conceptional Design For Mobile 14 Capturing The Idea 16 Designing User Experience 22 Android 22 The Ecosystem 24 Prerequisites 25 Implementation 28 Testing 30 Building 30 Signing 31 Distribution 32 Monetization 34 BlackBerry Java Apps 34 The Ecosystem 35 Prerequisites 36 Implementation 38 Testing 39 Signing 39 Distribution 40 Learn More 42 BlackBerry 10 42 The Ecosystem 43 Development 51 Testing 51 Signing 52 Distribution 54 iOS 54 The Ecosystem 55 Technology Overview 57 Testing & Debugging 59 Learn More 62 Java ME (J2ME) 62 The Ecosystem 63 Prerequisites 64 Implementation 67 Testing 68 Porting 70 Signing 71 Distribution 72 Learn More 4 75 Windows Phone 75 The Ecosystem 76 Implementation 82 Testing