Chapter - 5
Computer Virus
1.
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What are the symptoms of a
computer virus?
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Symptoms of a virus include computer lockups, screen
distortions, data loss, and unusual messages and reduced computer
performance.
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2.
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What is an antivirus program?
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Antivirus programs check the files on your computer for viruses and
also remove the entire virus.
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3.
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What is the full form of VIRUS?
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Vital Information Resources Under Seize
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4.
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What is a computer virus?
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Computer
viruses are small software programs that are designed to spread from one
computer to another and to interfere with computer operation.
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5.
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Write the names of any three
Antivirus software
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Norton Antivirus, Kaspersky, and McAfee
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6.
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What is a Boot sector virus?
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Boot sector viruses affect the boot sector area of a hard disk.
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7.
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Write short notes on: Worms, Trojans
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Worms: A worm is a malicious program that duplicates itself. They
eventually fill up the disks space with copies of itself and thereby make a
computer system to work very slowly.
Trojans: These viruses at first appear to be friendly but are very
malicious programs. They steal
information from the computer.
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8.
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Why it is necessary to scan an external device
attached to your computer, before using it?
Describe the process of scanning it.
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Because external devices may contain viruses, that affects our
computers.
Step 1. Double Click the Kaspersky Anti-Virus.
Step 2. Click Scan option
Step 3: Click the Full Scan option to scan all the drives of your
computer.
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9.
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What precautions should you take to protect your
computer from a virus?
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Do not use a CD or pen drive received from another person unless you
are certain that the disk does not contain a virus.
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Do not download programs or other information from non-reputed
sources on the Internet.
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Restrict access to your system.
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Install Antivirus programs on your computer.
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10.
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Why is it necessary to update your Anti-Virus
software?
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New viruses
appear often. You must keep updating
your antivirus software regularly to fight against these new viruses.
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11.
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What are ‘bombs’ in connection with virus?
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Bombs are
viruses which activate themselves after a specific time period and cause
damage to the computer system.
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12.
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What do you mean by a macro virus?
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Macro
viruses are written in the scripting
languages for Microsoft programs such as MS Word and MS Excel. These viruses spread by Excel spreadsheets
and other Microsoft Office documents.
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13.
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How do computer viruses attack our computers?
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Through an infected CD or Pen drives.
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Through e-mail attachments.
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Visiting malicious website and downloading infected files.
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Starting an infected application as it infects other running
applications.
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