Computer Security Questions with Solutions
Computer security protects computers, networks and data from theft, damage and unauthorised access. This topic covers types of malware (viruses, worms, Trojan horses, ransomware, spyware and adware), common attacks such as phishing, spoofing, denial of service (DoS) and hacking, and protective measures such as antivirus software, firewalls, encryption, strong passwords, two-factor authentication and backups. It also covers basic cryptography terms (plaintext, ciphertext, symmetric and asymmetric encryption), digital signatures, and good cyber hygiene. Exam questions often ask about the difference between similar threats. A virus attaches itself to a program and needs a user action to spread, while a worm spreads across networks on its own. A Trojan horse pretends to be useful software. A firewall monitors and filters network traffic, which is different from antivirus software. Practise the computer security questions below. Each answer includes an explanation.
- Q1.
Which of the following is used to protect objects in computer system, in the absence of more complete protection schemes?
A. digital certificateB. digital signatureC. passwordsD. tokensmediumAsked in TCS ExamView solution › - Q2.
Which of the following are valid phases of a computer virus?
A. Only Triggering. ExecutingB. Only Propagation, ExecutingC. Only Dormant, Propagation, Triggering. ExecutingD. Only Dormant, Propagation, TriggeringmediumAsked in TCS ExamView solution › - Q3.
Which mechanism is used by the computer virus 'worm' to duplicate itself?
A. SwapB. IncrementC. SpawnD. SwarmmediumAsked in TCS ExamView solution › - Q4.
Which of the following uses the spawn mechanism to duplicate itself?
A. Trojan horseB. WormC. Keystroke loggerD. Logic bombmediumAsked in TCS ExamView solution › - Q5.
Which of the following is the ability to limit and control the access to host systems and applications via communication links?
A. IntegrityB. AuthorizationC. Access controlD. Authentication.mediumAsked in TCS ExamView solution › - Q6.
In terms of computers, the set of ways in which an adversary can enter a system and can potentially cause damage is called:
A. Attack SurfaceB. Attack SignatureC. Attack PatternD. Attack PathmediumAsked in TCS ExamView solution › - Q7.
The use of mathematical techniques to provide security services, such as confidentiality, data integrity, entity authentication and data origin authentication, is called:
A. CryptologyB. CryptographyC. Cryptographic AlgorithmD. CryptanalysismediumAsked in TCS ExamView solution › - Q8.
In which of the following, VIRUS cannot be removed?
A. InternetB. IntranetC. Personal ComputerD. CDmediumAsked in TCS ExamView solution › - Q9.
Hacking refers to the
A. Act of breaking into another computer systemB. Act of re-configuring or re- programming of a systemC. Act of intruding someone else's personal information space so as to use it for malicious purposesD. All of the abovemediumAsked in TCS ExamView solution › - Q10.
Which of the following refers to a technique for intercepting computer communications?
A. HackingB. SniffingC. PretextingD. SpoolingmediumAsked in TCS ExamView solution › - Q11.
All of the following are examples of real security and privacy risks EXCEPT
A. SpywareB. SpamC. HackersD. Identity TheftmediumAsked in TCS ExamView solution › - Q12.
What is a person called, who uses a computer to cause harm to people or destroy critical systems?
A. CyberterroristB. Black-hat hackerC. Cyber CrackerD. HacktivistmediumAsked in TCS ExamView solution ›