COMPUTER SCIENCE BOOK FOR CLASS 9
Assignments for Class 9 Computer Science with important questions and answers for all chapters in book for Class 9 Computer Science as per syllabus issued. Click on links below for Class 9 Computer Science to download solved sample papers, past year question papers with solutions, pdf worksheets, NCERT Books . COMPUTER APPLICATIONS CLASS IX (Code No) Effective from the session 1. Prerequisites No background in computer science is required. 2.
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Choose an image from your computer and resize it in three different styles and save it. ix. The ID selector is defined with ______ symbol. x. The class selector is used to specify programming language with object-oriented capabilities that Write the command to create the table 'book' with the following specification. Class 9 Computer Science notes according to FBISE syllabus. Contains solved exercises, MCQs, important board questions and chapter overview. Table of Content for: Punjab Board > Class 9 > Computer Science (Total Videos: Chapter 1: Introduction to Computers Chapter 2: Computer Components.
Prepared By: Hassan Nasrullah Karachi. Hnn live. It can also perform all arithmetic and logical functions according to instructions given in a systematic order to solve any problem and produce processed information.
Computer Science Book for Class 9
Advantages of Computers Speed Since Computer is an electronic machine and electrical pulses travel at the rate of passage of electric current. This speed enables the computer to perform millions of calculations per second. Storage A computer has too much storage capacity.
Once recorded, a piece of information can never be forgotten. Checking circuits are built directly into the computer, that computer errors that undetected are extremely rare.
Versatility Computer can perform any task, provided it can be reduced to a series of logical steps. Diligence Computer never gets tired. It performs most boring, repetitive and monotnous task.
Automatic Operation Once a program is fed into computer the individual instructions are processed on after the other. Thus computer works automatically without manual intervention.
Obedience The ability to take in and store a sequence of instructions for the computer to obey. Decision Making Capability Computer can take simple decisions, such as less than, greater than or equal to. It also determines whether a statement is true or false.
All Hardware components may be connected mechanically, electrically or electronically with each other. Software Computer required a number of instructions to do any job.
The set of these instructions forms programs. Numbers of programs are combined for some purposes are called software. They are designed by manufactures and programmers. Types of Software 2. Application Software Ages of Computer At the early age people used pebbles, stones, sticks, scratches, symbols and finger tips to count, which were later replaced by numbers.
The history of computing is divided into three ages during which man invented and improved different types of calculating machines.
Computer Applications: A Textbook for Class IX
Abacus consists of a rectangular wooden frame having rods which carry round beads. Counting is done by shifting the beads from one side to another.
This device consists of two movable rules placed side by side on which number were marked. This machine consists of gears, wheels and dials. It was capable of adding and subtracting operations. Lady Ada Augusta an assistant of Babbage is called the first programmer.
The machine could sense and punch holes, recognize the number and make required calculations. This machine was first used in s by American Census Bureau. He completed his project in with the help of IBM Engineers. Mark 1 could multiply two, twenty digit numbers in 5 seconds and made a lot of noise. It had a shape like a monster about 50 feet long, 8 feet high, having wiring of length equal to distance from Lahore to Gilgit or Karachi to Bahawalpur km and had thousand ends of electro-magnetic relays.
CBSE Class-9 Syllabus 2018-19 (Computer Applications)
This was based on decimal number system and it has no memory. It could perform additions or multiplications in one second.
It contained vacuum tubes, 70, resistors, 10, capacitors and 60, switches and occupied a two room car garage. It consumed kW of power. Chapter 3: Office Automation 3. Office Automation 25 videos 3. Spreadsheet 15 videos 3. Urdu Editor 3 videos Total Sections: Chapter 4: Data Communication 4.
Data Communication 5 videos 4. Transmission Media 9 videos 4. Communication Devices 4 videos 4. Communication Terminologies 4 videos Total Sections: Chapter 5: Computer Networks 5.
Introduction to Network 6 videos 5. Types of Networks 5 videos 5. Communication over Network 5 videos Total Sections: Chapter 6: Computer Security and Ethics 6. Computer Security 5 videos 6. Computer Viruses 2 videos 6. Authentication Mechanisms 7 videos Total Sections:Glossary Glossary.
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