COMPUTER APPLICATIONS CLASS IX

  Computer Applications               Class IX     Revision Worksheet   Q1. Multiple choice questions;- i                         The part of a computer that allows the user to view information             on a screen.           a. Mouse      b. RAM      c. Monitor       d. CPU ii. This part sends signals to other parts of the computer to tell them what        to do.            a. Keyboard       b. Mouse       c. Hard disk       d. CPU iii. This memory is for short ...

 Computer Applications Class IX M. S. Word I (Chap 7) Worksheet 08 (chap 7) September 2020:- M. S. Word is WYSIWYG program. What you see is what you get program is the one that shows the document on screen, exactly the way it will on the print out. Word wrap- In M.S. Word, when a word does not fit on a line, it automatically flows to the beginning of the next line; this process is known as Word Wrap. Margin- The distance from the text to the paper’s edge is called Margin. The margins are of different types: 1. Left Margin- This is the distance between the text and the left edge of the paper. 2. Right Margin- This is the distance between the text and the right edge of the paper. 3. Top Margin- This is the distance between the text and the top edge of the paper. 4. Bottom Margin- This is the distance between the text and the bottom edge of the paper. Indent- The distance between text boundaries and page margins is called Indent. There are broadly three types of indents: 1. Positive i...

 Computer Applications Class IX M. S. Word I (Chap 7) Worksheet 07 (chap 7) September 2020:- A Word processor is a package that processes textual matter and creates organized and flawless documents. Word processing software provides a general set of tools for entering, editing and formatting text. Nearly all the document types that we use in our daily lives can be created in a word processor. Features of word processor- 1. Fast 2. Editing 3. Permanent storage 4. Formatting 5. Graphics 6. OLE(object linking and embedding) 7. Spell check 8. Mail Merge Working with a word processor usually involves these steps- i. Creating or opening a document ii. Typing text in it. iii. Editing the document, if required, and iv. Saving the document for later use. Major component s of the document Window- 1. Title bar 2. Menu bar 3. Formatting toolbar 4. Standard toolbar 5. Ruler bar 6. Status bar 7. Scroll bar 8. Work area Worksheet 07 Solution (chap 7) September 2020:- Q1. Multiple Choice Questions...

 Computer Applications Class IX Basics of Operating Systems (Chap 4) Worksheet 06 SOLUTION (chap 4) Aug 2020:- 1. Multiple choice questions:- i. When the computer has to react within a guaranteed time to an input, which type of operating system is best? a. Multi-tasking b. Real time processing c. Batch Processing ii. Which type of operating system allows multiple tasks to run at the same time, each taking turns using the resources of the computer? a. Real- time processing b. batch processing c. multi-tasking iii. Which of the following is NOT an operating system? a. Linux b. Windows XP c. Bendix 2. What are the different types of operating systems? Ans2. The operating systems are of mainly following types: i. Single User OS ii. Multiprogram OS iii. Time Sharing OS iv. Real time OS v. Multiprocessing OS 3. What is Multi-user system? Ans3. A Multi-user system is a computer system designed to be used simultaneously by more than one user. A system that enable more than one user to acce...

Computer Applications Class IX Basics of Operating Systems (Chap 4) Device Driver A device driver is a group of files that enable one or more hardware devices to communicate with the computer’s operating system. Each hardware device installed on a computer requires a different type of device driver or hardware driver. The device driver provides specific instructions to the operating system in order for the hardware device to perform properly. Types of Operating Systems- 1. Single User OS- It supports only one user at any point of time. There can be two subcategories of this OS type: (i) Single Task OS- This OS supports single application at a time e.g., OS for mobiles, MS-DOS etc. (ii) Single User, Multitasking OS- This OS supports one user but can deal with multiple applications running at a time e.g. simultaneously running word document, a video, internet browsing, listening to music etc. Eg. Windows Vista, Windows 7/8, Linux, MacOS Leopard etc. 2. Multi program OS- It supports multi...

 Computer Applications Class IX Basics of Operating Systems (Chap 4) Operating Systems- Shell and Kernel Operating system has broadly two components: Shell and Kernel. v The shell part is responsible for interacting with the users and v The kernel part is responsible for interacting with hardware. The shell act as the interpreter which does these things: i. Get the commands/instructions from the user. ii. Translate the received commands / instructions into the machine language. iii. Pass the translated command to the Kernel to get it done. The Kernel is the core part of an operating system. It functions at a basic level, communicating with the actual hardware and managing resources, such as CPU and the memory. It works as an interface between the user applications and the hardware. Functions of operating system broadly fall into three categories- Essential functions, monitoring functions and service functions. Essential functions ensure effective utilization of computer system reso...

 Computer Applications Class IX Basics of Operating Systems (Chap 4) Worksheet 04 (chap 4) Aug 2020:- 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 int...

 Computer Applications  Class IX    Types of Software (Chap 3) Worksheet 3 SOLUTION (chap 3) July 2020:- 1. Below is a list of various types of application software:- A. Database E. Modelling B. Desk top publishing F. Spreadsheet C. Drawing G. Web Design D. Mail merging H. Word processing Which one would be the most suitable to use for each of the following tasks? a. Rotation of shapes b. Typing in text for a novel c. Using frames to position text and graphics on a page d. Replication of cells e. Carrying out a complex search on two or more criteria f. A simple flight simulation Ans1. a. C. (drawing) b. H (word processing) c. B (desk top publishing) d. F (spreadsheet) e. A (database) f. E ( Modelling ) 2. What is the full form of DBMS? Ans2. Database Management System 3. List some of the task performed by operating system. Ans3. An operating system performs mainly following tasks: (i) Provides user interface (ii) Controls hardware (iii) Assigns Memory (iv) Handles ap...

 Computer Applications Class IX  Types of Software (Chap 3) Worksheet 02 solution (chap 3) July 2020:- 1. Multiple choice questions:- i. This language processor converts HLL into assembly language is called a) Assembler b) Interpreter c) Compiler d) All of the above ii. LCD stands for a) Liquid crystal display b) Light crystal display c) Light color display d) None of these iii. This language processor converts a HLL program into machine language by converting and executing it line by line. a) Assembler b) Interpreter c) Compiler d) Operating system iv. Which software takes control of computer system on startup? a) Compiler b) Operating System c) Application software d) All of these v. The primary job of the operating system of a computer is to a) Manage resources b) be user friendly c) Provide utilities d) All of the above 2. What are the major components of a computer system? Ans2. Major components of a computer system are: 1. Hardware 2. The Operating System 3. The Applicat...

 Computer Applications  Class IX      Types of Software (Chap 3) Worksheet 1 SOLUTION (chap 3) July 2020:- 1. Multiple choice questions:- a) The software that controls internal computer operations is called……………… i) System software ii) Application software iii) Hardware iv) None of these b) A program which acts as an interface between user and the hardware is called i) Operating system ii) Application software iii) Memory iv) None of these c) HLL stands for i) High level language ii) Hybrid level language iii) High language label iv) None of these d) Which one of the following not a type of operating system? i) Linux ii) BOSS iii) Open Office iv) Windows e) Which one of the following is Antivirus software? i) Kaspersky ii) BOSS iii) MS Word iv) Unix 2. What is application software? Why is it required? ANS2. Application software is the set of programs necessary to carry out operations for a specified application. Application software is required because system so...

 Computer Applications Class IX Types of Hardware (chap-1) 1. Hardware- Hardware refers to physical parts of the computer that can be touched physically. For example monitor, keyboard, hard drive etc. 2. Classification of Hardware- • CPU (Central Processing Unit) • Memory- A. Primary Memory (Internal Memory) a. ROM (Read Only Memory) b. RAM (Random Access Memory B. Secondary Memory (Auxiliary Memory) • All Storage devices like hard disk, CD, DVD, pen drive etc. • Input Devices • Output Devices 3. Memory in a Computer System- a. Main Memory or primary memory or internal memory- The memory that holds data and instructions during processing. It is temporary memory. b. Auxiliary or secondary or external memory- The memory that can store data or files for later use i.e. permanently. 4. Units of Memory - Computers store and process data in the form of binary numbers. A binary number is either a ‘0’ or a ‘1’ and is known as bit, which is the short form for binary digit. Unit Short Name Fu...

                                    Computer Applications   Class IX Types of Hardware (chap-2)     Storage Devices   Primary Memory has a limited storage capacity and is not permanent, secondary storage devices are used to store large amount of data permanently. There are various types of secondary devices available. Some most common storage devices are: v Hard disks                    Magnetic v Floppy disks                    Media   v CD ROMs                        Optical v   DV...