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The book is designed with the aim to provide fundamental knowledge of computer system, basic concepts of Internet world and application of cloud computing. ..
The book is designed with the aim to provide fundamental knowledge of computer system, basic concepts of Internet world and application of cloud computing.
Unit 1 introduces computer, its characteristics and its applications along with real-time examples. This unit also discusses the classification of computers based on their size and type, working technology and the application of computer in different domain areas. Moreover, work-flow of computer system is explained using block diagram.
As a computer user, we need to be aware of the memory present in a computer as well as main components of the computer, their functions and the interconnection between the different components of the computer and role of software which provides communication channel between hardware and user. Unit 2 describes concept of bus, different kind of memories along with their use and the interaction between them, hardware components and concept of software.
We use computer to process the data and get the desired output. The data input can be in the form of alphabets, digits, symbols, audio, video, magnetic cards, finger prints, etc. Since computer can only understand 0 and 1, the data must be presented to the computer in terms of 0s and 1s. The purpose of Unit 3 is to introduce you to the data representation in the computer i.e. introduction of decimal, binary, octal, and hexadecimal number system, conversion of decimal to binary and vice versa along with ASCII and ANSI character code.
The functioning of a computer system is based on the combined usage of both input and output devices as it provides an interface between the user and the computer. In Unit 4, we have discussed the functionalities of various input and output devices.
At present, Internet has become very popular. The services provided by Internet help the present human civilization to such an extent that life without internet seems to be impossible. You may have heard people using terms like the cloud, cloud computing, or cloud storage. But what exactly is the cloud? Simply put, the cloud is the Internet-more specifically, it's all of the things you can access remotely over the Internet. When something is in the cloud, it means it's stored on Internet servers instead of your computer's hard drive. Unit 5 describes concepts of Internet, its services, technical view and cloud computing.
This subject is not only important to have a basic awareness of how a computer system works but is also equally significant for competitive exam aspirants. This is because Computer Knowledge is an essential part of the syllabus for major Government exams conducted in the country.
Dr. Priti M. Tailor
She is serving as Assistant Professor in Sutex Bank college of Computer Application and Science, Amroli, Surat since 2007. Her academic qualification is BCA, MCA, M.Phil.(Computer Science) and Ph.D.(Computer Science and Information Technology). She has co-authored two books in computer science subject.
Dr. Viral B. Polishwala
He is working as an Asst. Professor at Sutex Bank College of Computer Applications & Science, Since 2010. He had completed B.Sc. (Computer Science) – 2001 and M.C.A. – 2004. He has completed his Ph.D. in the area of cryptography algorithms and protocols. He has also cleared NET Exam in July 2019. He was a co-author in two books of computer science subject. His area of interest are; Web Development and Cryptography. He had attended many FDPs, STTPs, MOOCs etc.
Dr. Purva N. Desai
She obtained her Ph.D. in area of web Security from the JJTU, Rajasthan and M.Sc. (ICT) from the VNSGU, Surat, Gujarat. Since 2008, she is serving at Vivekanand College for Advanced Computer and Information Science as an assistant professor. She has represented many research papers at State level, National level and International level conferences. She achieved Best Research Paper award for “Detecting Cross-Site Scripting Attack Based on Input Analysis” at International conference on Emergence of India as a Global Economy: Challenges and Opportunities”, Sterling Institute, Mumbai. She is also author of the books entitled “E-Commerce & Cyber Security” published in year 2015, “Essence of Operating System” published in year 2018 and “Fundamentals of E-Business” published in year 2020. She has actively participated in many workshops, orientation program, refresher programs, seminars, FDPs and national as well as international level conferences. Her areas of interest are Database Management System, Data Science, Operating System, Networking, Web Designing, Ethical hacking and E-Commerce.
This book is dedicated to our family, colleagues, friends and well-wishers who gave constant support, love and inspiration. Their constant encouragement allowed us to achieve our milestones.
We take this opportunity to express our heartfelt gratitude to Prof. Chetan Rathod and his team for bringing an innovative concept of providing class room notes gathered from experienced faculties which helped the students to explore their subject knowledge.
This book is influenced by various books and websites. We would like to thank all owners or authors of such web references and books.
We are thankful to all our faculties who directly or indirectly contributed and helped us to achieve success in form of this book. We would also like to thank all our students who had many queries in concepts which motivated us design this book which can be utilized as reference book in future.
Last but not the least we express our deepest gratitude to Jump2Learn for being a supportive platform to publish this book.
Index
Unit – 1 Introduction 1
Unit – 2 Basic Computer Architecture 15
2.1 Computer System Architecture 16
2.2 Hardware components 17
2.3 Concepts of Cache Memory and Virtual Memory 30
Unit – 3 Number System 34
3.1 Introduction to Decimal, Binary, Octal and Hexa-Decimal Number System 35
3.2 Conversion: Decimal to Binary and Binary to Decimal 36
3.3 Binary Addition and Subtraction 39
3.4 ASCII and ANSI Character Code 41
Unit – 4 Input & Output Device 43
4.1 Introduction to Input Devices 44
4.2 Introduction & Purpose of Scanning Devices 49
4.3 Introduction & Comparison of Output Devices 51
Unit – 5 Concepts of Internet 62
Basic Terminologies 63
5.1 Concepts of Internet & WWW 64
5.2 Introduction of Cloud 77
5.3 Introduction of Web Browser & Relevant Terminology 81
Model Test Papers
Paper - 1 86
Paper - 2 88
Paper – 3 90
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