Computer Security Questions and Answers

Q: State whether the following statement is true. i) A macro virus is platform independent. ii) Macro viruses infect documents, not executable portions of code.

Correct answer: Both i and iiBoth statements are true, and for the same reason: a macro virus is written in the macro language of an application, not in machine code. So it infects documents rather than executables, and it runs wherever the application runs, whatever the operating system underneath.

Q: -------- are attempts by individuals to obtain confidential information from you by falsifying their identity.

Correct answer: Phishing scamsPhishing means impersonating a bank, a service or a colleague in order to persuade the victim to hand over passwords or card details. Spyware takes information without asking rather than by asking under a false name, and phishing trips is not a term.

Q: Which among the following is not an external threat to a computer or a computer network

Correct answer: IgnoranceTrojans, adware and crackers all come from outside the organisation. Ignorance is an internal weakness - a user who does not know what not to click - which is what makes it the odd one out.

Q: Code red is a(n) ----------

Correct answer: VirusCode Red was a worm that attacked Microsoft IIS web servers in 2001, and in the loose usage of these questions it is classed as a virus - that is, as malicious code rather than as any kind of application.

Q: The first computer virus is --------

Correct answer: CreeperCreeper, written in 1971 for the ARPANET, is generally counted the first computer virus: it copied itself between DEC PDP-10 machines and displayed the message I'm the creeper, catch me if you can. Blaster, Sasser and ILOVEYOU are all much later, from 2000 onwards.

Q: What is the name of the Act that governs internet usage in India?

Correct answer: The Information Technology Act, 2000The Information Technology Act, 2000 is India's principal statute on electronic records, digital signatures and cybercrime; it was substantially amended in 2008. The other two titles are invented.

Q: Which among the following is a class of computer threat

Correct answer: DoS attacksA denial of service attack is a recognised class of computer threat: it floods a system until it can no longer serve anyone. Phishing is a technique rather than a class, and soliciting and stalking are social offences rather than attacks on a computer.

Q: What is the first boot sector virus?

Correct answer: BrainBrain, written in Pakistan in 1986, was the first boot sector virus for the PC: it replaced the boot sector of a floppy disk and spread whenever an infected disk was used to start a machine. Elk Cloner, from 1982, was earlier but infected the Apple II.

Q: Digest created by a hash function is normally called a

Correct answer: Modification detection code (MDC)A plain hash, computed without a key, is a modification detection code: it detects change but proves nothing about origin, since anyone can recompute it. Adding a key turns it into a MAC.

Q: Both email attachments and downloaded files can spread malware.

Correct answer: TrueBoth are ways of getting a file onto the machine and running it, which is all malware needs. An attachment is simply a file delivered by mail rather than fetched from a site, so the risk is the same in kind.

101.

State whether the following statement is true. i) A macro virus is platform independent. ii) Macro viruses infect documents, not executable portions of code.

A.i-only
B.ii-only
C.Both i and ii
D.Neither i nor ii

Answer: C

Correct answer: Both i and ii

Both statements are true, and for the same reason: a macro virus is written in the macro language of an application, not in machine code. So it infects documents rather than executables, and it runs wherever the application runs, whatever the operating system underneath.

Discuss in Forum

102.

-------- are attempts by individuals to obtain confidential information from you by falsifying their identity.

A.Phishing scams
B.Phishing trips
C.Spyware scams
D.Computer viruses

Answer: A

Correct answer: Phishing scams

Phishing means impersonating a bank, a service or a colleague in order to persuade the victim to hand over passwords or card details. Spyware takes information without asking rather than by asking under a false name, and phishing trips is not a term.

Discuss in Forum

103.

Which among the following is not an external threat to a computer or a computer network

A.Ignorance
B.Trojan horses
C.Adware
D.Crackers

Answer: A

Correct answer: Ignorance

Trojans, adware and crackers all come from outside the organisation. Ignorance is an internal weakness - a user who does not know what not to click - which is what makes it the odd one out.

Discuss in Forum

104.

Code red is a(n) ----------

A.Word Processing Software
B.Photo Editing Software
C.Antivirus
D.Virus

Answer: D

Correct answer: Virus

Code Red was a worm that attacked Microsoft IIS web servers in 2001, and in the loose usage of these questions it is classed as a virus - that is, as malicious code rather than as any kind of application.

Discuss in Forum

105.

The first computer virus is --------

A.Sasser
B.Blaster
C.Creeper
D.I Love You

Answer: C

Correct answer: Creeper

Creeper, written in 1971 for the ARPANET, is generally counted the first computer virus: it copied itself between DEC PDP-10 machines and displayed the message I'm the creeper, catch me if you can. Blaster, Sasser and ILOVEYOU are all much later, from 2000 onwards.

Discuss in Forum

106.

What is the name of the Act that governs internet usage in India?

A.The Internet consumption Act, 1998
B.The Information Technology Act, 2000
C.The IT Gazette of India Act, 2004
D.None of these

Answer: B

Correct answer: The Information Technology Act, 2000

The Information Technology Act, 2000 is India's principal statute on electronic records, digital signatures and cybercrime; it was substantially amended in 2008. The other two titles are invented.

Discuss in Forum

107.

Which among the following is a class of computer threat

A.Phishing
B.Soliciting
C.DoS attacks
D.Stalking

Answer: C

Correct answer: DoS attacks

A denial of service attack is a recognised class of computer threat: it floods a system until it can no longer serve anyone. Phishing is a technique rather than a class, and soliciting and stalking are social offences rather than attacks on a computer.

Discuss in Forum

108.

What is the first boot sector virus?

A.Mind
B.Brain
C.ELK cloner
D.None of the above.

Answer: B

Correct answer: Brain

Brain, written in Pakistan in 1986, was the first boot sector virus for the PC: it replaced the boot sector of a floppy disk and spread whenever an infected disk was used to start a machine. Elk Cloner, from 1982, was earlier but infected the Apple II.

Discuss in Forum

109.

Digest created by a hash function is normally called a

A.Modification detection code (MDC)
B.Modify authentication connection
C.Message authentication control
D.Message authentication cipher

Answer: A

Correct answer: Modification detection code (MDC)

A plain hash, computed without a key, is a modification detection code: it detects change but proves nothing about origin, since anyone can recompute it. Adding a key turns it into a MAC.

Discuss in Forum

110.

Both email attachments and downloaded files can spread malware.

A.True
B.False
C.Maybe
D.None

Answer: A

Correct answer: True

Both are ways of getting a file onto the machine and running it, which is all malware needs. An attachment is simply a file delivered by mail rather than fetched from a site, so the risk is the same in kind.

Discuss in Forum

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