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BASICS OF OPERATING SYSTEM CLASS IX

 1. Name any two popular operating systems?  Ans1. Windows 7, Linux 2. What is operating system?   Ans2. An operating system is a program, which acts as an interface between a user and the hardware (i.e. all computer resources). For eg. Windows 7, MS DOS etc. 3. Write the full forms a. MS DOS- Microsoft Disk Operating System  b. MAC OS- Macintosh Operating System 4. Describe any two roles of an operating system?  Ans4. Two roles of an operating system are 1. Program execution- The command interpreter is a part of any operating system. It receives the commands from any application or system program, interprets it and then executes it. 2. Providing user interface - A user interface refers to the way an operating system interacts with its users. An operating system has two parts: kernel and shell. The kernel is responsible for interacting with hardware and the shell is responsible for interacting with the user. The shell acts as the command interpre...
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Computer Applications Class IX Types of Software (Chap 3)

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 HARDWARE- Hardware represents the physical and tangible components of the computer i.e. the components that can be seen and touched. Input devices, output devices, CPU, floppy disk, hard disk, CD, DVD etc. are examples of computer hardware.  ● SOFTWARE- software represents the set of programs that govern the operation of computer system and make the hardware run.  ● SOFTWARE can be classified broadly into two categories.  1. System Software- refers to the programs that control internal computer operations and make best use of the hardware. The system software can further be classified into following categories: Operating system Language processor Utilities or Utility Software  2. Application Software- is the set of programs necessary to carry out operations for a specified application. These are the programs written by programmers to enable computer to perform a specific task such as processing words, inventory control, handling calculations and figures, medica...
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CLASS IX 9 FEB 2023

Write down the name and purpose of various components of a chart. Answer: Various components or parts of chart are as follows: X-axis Refers to a horizontal axis, which is also known as category axis. Y-axis Refers to a vertical axis also known as value axis. X-axis title Conveys the full details of the X-axis values. Y-axis title Conveys the full details of the Y-axis values. Data series Refers to a set of data that you want to display in a chart. Chart area Refers to the total space that is enclosed by a chart. Plot area Refers to the main region of the chart in which your data is plotted. Chart title Denotes the type of data plotted in a chart. Legend In a chart showing different data series, a unique color or pattern is assigned to each data series. This unique color of pattern is known as a legend. Gridlines These are the horizontal and vertical lines within the plot area in a chart. Explain the concept of cell referencing along with its various types. Answer: Excel supports thr...
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