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15.    What are worms?
                  Ans.  Worms are the computer programs or algorithms which are alien to the host computer and are
                         designed to purposely slow down the functioning of a computer.
                  16.    Define Trojan horse.
                  Ans.  Trojans are infectious programs which silently infect the computer and corrupt the files of a host
                         computer.
                  17.    Define Spam.
                  Ans.  Spam refers to an unwanted and unsolicited message which is received in the inbox of a person’s
                         e-mail account or in newsgroups.
                  18.    Define Program File Virus.
                  Ans.  A program file infecting virus is a type of malware that infects the executable files of a program
                         with the intention of causing permanent damage or making the program useless.
                  19.    How does a handout support a presentation package?
                  Ans.   Handouts are the hard copy of pages or slides of a presentation that are the supporting documents of
                         the presentation which are given to the viewers. These are compressed and printed version of slides.
                  20.    What is a template?
                  Ans.  Template  is  a  predefined  format,  background  and  colour  layout  that  can  be  applied  to  a
                         presentation, but it does not include any content.
                  21.    What is meant by Slide Transition?
                  Ans.  Slide Transition sets the style of appearance of slides in a presentation. It is the effect applied
                         when a slide changes to another during on-screen presentation or slide show.
                  22.    Define the term Notes View?
                  Ans.  Notes view enables the user to add notes to the slides in a presentation. In the notes view, the
                         slides are displayed in a reduced form on top of the page.
                  23.    What is meant by sorting data?
                  Ans.  Sorting refers to the process of arranging data in ascending or descending order based on a
                         certain criteria.
                  24.    State the purpose of TODAY() and NOW() functions.
                  Ans.  TODAY() produces the current date, it contains no argument.
                         NOW() produces the current date and time, it contains no argument.

                  25.    What is meant by Gridlines in a chart?
                  Ans.  Gridlines refers to the horizontal and vertical lines in the plot area. The gridlines are inserted in
                         the chart to enhance its readability.
                  26.    What does a #REF! error indicate?
                  Ans.  #REF! occurs when a cell reference is not valid.
                  27.    Name the tool used to copy the formatting from a particular piece of text to the other.
                  Ans.  Format Paintbrush
                  28.    What is changing and modifying the appearance of the paragraph called?
                  Ans.  Paragraph Formatting
                  29.    Name the formatting style applied to a + b .
                                                                    2
                                                               2
                  Ans.  Superscript
                  30.    Name the layout of the paper in which the document gets printed.
                  Ans.  Orientation


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