Viruses
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Does a virus need a host file to spread?
2. Does a virus spread only after a user runs the infected file?
3. Can a virus replicate itself?
4. Can a virus run without ever being attached to a file?
5. Can antivirus software detect known viruses?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1Virus | AA user opening an infected attachment | |
| 2Infected executable file | BA virus attaching itself to a document macro | |
| 3A virus needs a host file to spread | CMalware that attaches to a host file and replicates when run | |
| 4A virus activates when the infected file runs | DA program a virus has attached itself to | |
| 5A virus can run without any host file | EA virus always needs a host file to spread | |
| 6Antivirus software cannot detect viruses | FAntivirus software can detect known viruses |
C
Definitions
Virus
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
A virus ________ to a host file.
2.
It _______ when a user runs it.
3.
A virus _____ a host program.
4.
Viruses _________ when executed.
5.
Antivirus scans can ______ viruses.
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
A virus needs a host file.
B
It replicates on its own.
C
It spreads when executed.
Question 2
A
Viruses attach to programs.
B
They run without any host.
C
They spread when executed.
Question 3
A
A virus needs user action.
B
It can corrupt or copy itself.
C
Antivirus can detect viruses.
Question 4
A
Viruses attach to files.
B
They replicate when run.
C
Worms need no host file.
D
They cannot damage data.
Question 5
A
A virus infects a host.
B
It needs a program to run.
C
It spreads with no user help.
D
Antivirus can detect it.
Answer Key
Viruses
Section A: Quick Questions
Q1
A — Yes
Q2
A — True
Q3
B — Yes
Q4
B — False
Q5
A — Yes
Section B: Match the Pairs
Q1
Virus → Malware that attaches to a host file and replicates when run
Q2
Infected executable file → A program a virus has attached itself to
Q3
A virus needs a host file to spread → A virus attaching itself to a document macro
Q4
A virus activates when the infected file runs → A user opening an infected attachment
Q5
A virus can run without any host file → A virus always needs a host file to spread
Q6
Antivirus software cannot detect viruses → Antivirus software can detect known viruses
Section C: Definitions
Q1
Virus — Malware that attaches to a host file and spreads by replicating itself when a user runs the infected fileSection D: Fill in the Blanks
Q1
A virus attaches to a host file.Q2
It spreads when a user runs it.Q3
A virus needs a host program.Q4
Viruses replicate when executed.Q5
Antivirus scans can detect viruses.Section E: Spot the Error
Q1
A — Wrong — a virus does need a host file; it cannot replicate without one.
Q2
B — Wrong — viruses cannot run without a host file; they always need one to attach to.
Q3
C — Wrong — a virus corrupts and replicates itself, it does not just copy files unrelated to itself.
Q4
D — Wrong — viruses can damage or corrupt the files and data they infect.
Q5
C — Wrong — a virus needs a user to run the infected file; it does not spread with no user help.