IX chapter - 3

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.