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●   Unusual activity of messages or programs: Automatic opening or closing of a program, abrupt
                              restarting of a computer and opening of strange or unknown windows during the process of booting.
                          ●   Unusual Network Activity: Unusual network activity such as excessive transfer of data even when all
                              the applications are closed.
                      4.   Discuss several measures to prevent a Virus attack.
                      Ans. Some of the popular preventive measures to keep virus at bay are:

                          ●   Download Information from trusted Websites:  Always  download  contents  from  a  legitimate
                              website.  The  web  address  of  such  websites  start  with  ‘https’.  Untrusted  websites  might  infect  the
                              computer system with virus.

                          ●   Installation of Antivirus: Antivirus are remedial software that scan, detect, clean and remove virus
                              from a computer system. Some antiviruses also help to recover the data which are lost.

                          ●   Scanning &  Cleaning of Hard  Disk:  If  a  user  faces  some  unusual  symptoms  while  operating  a
                              computer, then it must be scanned and also cleaned as it may have been infected by a malware.
                          ●   Update the Antivirus:  The  existing  antivirus  has  to  be  updated  in  order  to  install  its  latest  virus
                              signature & clean new virus.
                  D.  Application based questions.
                      1.     Nikita wanted to gift her friend sport shoes. So she searched for this item online again and again but she
                          couldn’t find anything interesting. Her web browser shows him advertisements related to shoes. What
                          could be the possible reason she is seeing those advertisements?
                      Ans. Cookies
                      2.     Rakesh has recently joined a new office and is unfamiliar with many people there. He is receiving negative
                          and demeaning comments on his social media profile, along with unknown emails from unfamiliar sources.
                          What could be happening to Rakesh?
                      Ans. Cyber Bullying

                                                               SECTION C
                                               (Case-based/Passage-based Type Questions)
                        Malware refers to infectious programs that hampers the functioning of a computer system. It is unwanted
                      software which is designed to damage a computer system.
                      1.   Which computer programs or algorithms slow down the functioning of a computer?
                          i.  Virus                                           ii.  Worms

                          iii.  Trojan Horse                                  iv.  None of these
                      2.   Which one is the example of a spyware?
                          i.  Keylogger                                       ii.  Byte Bandit
                          iii.  Mydoom                                        iv.  Infostealer.Kronbank
                      3.     .................................... refers to an unwanted and unsolicited message which is received in the inbox of a
                          person’s e-mail account or in newsgroups.
                          i.  Boot Sector Virus                               ii.  Program File Virus
                          iii.  Spam                                          iv.  Spyware
                      4.   Which program silently infect the computer and corrupt the files of a host computer?
                          i.  Spyware                                         ii.  Virus

                          iii.  Spam                                          iv.  Trojan Horse



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