IX : Chapter3
A. Very short answer type questions.
a. Hardware and software are the two major components of the computer system.
b. The operating system is loaded in the main memory during the booting process.
c. Example for CUI is MS-DOS and GUI is Windows 7.
d. Bharat Operating System Solutions (BOSS) operating system is developed in India by C-DAC.
e. The three categories of software with one example of each category are :
System software e.g. MS-Windows 7,
Application Software e.g., MS-Word 2010 and Utility Software e.g., McAfee.
f. Disk Defragmenter is utility software helps to store the scattered files in the contiguous memory blocks.
g. MS-PowerPoint and OpenOffice.org- Impress are two softwares which are used for creating multimedia presentations.
h. Interpreter is language processor converts a high level language program line by line into machine executable codes.. e.g., BASIC.
B. Short answer type questions.
a. Hardware
● Physical components of computer which can be seen or touch.
● e.g., mouse, lightpen.
Software
● Cannot be seen or touched. They are set of programs stored in computer.
● e.g., MS-Windows 7, MS- Paint. b. The use of system software:
● Controls the internal functioning of the computer system.
● Coordinates the working of various hardware components.
● Acts as an interface between hardware and user.
c. CUI
● Stands for Character User Interface.
● User has to type commands to give instructions to the computer.
● It is different to use.
● e.g., MS-Dos , UNIX
GUI
● Stands for Graphical User Interface.
● User use various graphical components like menus, icons, buttons, etc. To give commands to the computer.
● It is user-friendly.
● e.g., MS-Windows 7, LINUX, BOSS, etc. d. Role of Device Driver:
● It enables the hardware device to interact with computer.
● Helps to understand the way the device will function in the computer system. e. Application software
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● Application software are the set of programs designed to handle a specific users job or task.
● e.g., MS-Office
Utility software
● Utility Software are used to perform the maintenance and housekeeping functions of computer like checking or removing virus, recovering deleted files , etc.
● e.g., Quick Heal, Disk defragmenters.
f. The two types of Application softwares are:
General Purpose Application Softwares: These type of softwares are capable of handling general user problems like documentation, database management, etc. e.g., MS-Word, MSPowerPoint.
Customised Application Softwares: These type of softwares are designed as per the requirements of a particular user after studying their needs like billing system, fee collection system, etc. e.g., Billing System, Inventory management.
g. (i) Operating system: Operating system is one of the system softwares that runs the computer by managing its different resources like processor, input/output, storage devices, etc. and acts as an interface between user and computer. e.g., MS-Windows 7, LINUX, BOSS, etc.
(ii) Assembler: It translates an assembly language program to its corresponding machine code.
Device driver: It is a software that enables the hardware device to interact with the computer.
(iii) Antivirus: It is a utility softare which is used to locate and remove viruses from computer system. e.g., QuickHeal, McAfee.
(iv) Defragmentation: Process of locating the non-contiguous fragments of data into which a computer file may be divided is stored on a hard disc.
C. Long answer type questions.
a. Language processor are system software converts the user program into the binary codes so that machine can understand user problem to solve them.
Various language processors are:
Compiler: It converts high level language program into machine codes in one go.
Interpreter: It converts high level language to machine code, line by line.
Assembler: It translates an assembly language program to its corresponding machine code. b. Some Utility softwares are:
● Antivirus software: protects the computer from attack of viruses. e.g., QuickHeal, McAfee.
● Backup Utility: helps to keep the duplicate copy of important information in some external storage device from where it can be recovered in case of some mishappenings. e.g., backup Exec.
● Compression Utility: Compress large files so that they take less space in the storage device. e.g., WINRAR.
● Disk Defragmenter: It helps to remove the memory gaps to enhance the data access speed of the computer system.
● Encryption and Decryption Tool: Encryption is the process of converting sensitive information into the encoded form. Decryption is the process of converting the encoded information to its original form.
c. Customised application softwares are very costly as compared to general purpose softwares because for their development, various software teams are established, software developers and testers are hired. Facility has to be created for development job.
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D. Application oriented questions.
a. He should install various graphics designing softwares like PageMaker, Adobe Photoshop, CorelDraw, Indesign, Illustrator, etc.
b. (i) 5
(ii) 3
(iii) 4
(iv) 1
(v) 2
c. Arjun computer is going to be attacked by the virus to his computer work very slow and lots of problems come to him to do any task so he has to use Antivirus software to rectify this problem.
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