UGC NET Questions (Paper – 1)

A computer worm is a type of malware that can copy itself and spread through network connections, often exploiting vulnerabilities. Unlike traditional viruses, it does not need to attach to an existing program or file to propagate. Worms can rapidly consume bandwidth, overload servers and cause widespread disruption. Hence, the definition given in this option aligns with standard ICT security terminology.

Option A:
This option actually describes a typical file-infecting virus, which embeds its code into host programs and often requires user execution to spread. While dangerous, this behaviour is different from the autonomous network propagation characteristic of worms. Therefore, it is not the best description of a worm.

Option B:
This option correctly points out that worms are self-replicating and move across networks independently of host files. They often scan for other vulnerable machines and copy themselves automatically. This makes them particularly challenging to contain in large ICT infrastructures.

Option C:
A harmless software update from a trusted vendor is intended to patch vulnerabilities and improve functionality, not to cause damage. Equating such updates with worms confuses legitimate maintenance with malicious activity.

Option D:
A physical cleaning device has nothing to do with malware, which is purely software-based. Using such equipment may help maintain hardware but does not relate to network-spreading malicious programs.

A worm is a stand alone piece of malware that reproduces itself and actively seeks new systems to infect, often exploiting vulnerabilities in network services. Unlike viruses, worms do not need to attach to existing files to spread. Their rapid propagation can consume bandwidth and cause network slowdowns or outages. Hence, the malware described in the stem is a worm.

Option A:
Option A, Trojan horse, appears to be legitimate software but contains hidden malicious functions; it does not typically self replicate across networks.

Option B:
Option B, spyware, secretly monitors user activity but does not necessarily propagate automatically to other machines.

Option C:
Option C, adware, focuses on displaying unwanted advertisements and may not include autonomous spreading mechanisms.

Option D:
Option D is correct because worms are defined by their ability to self replicate over networks without attaching to host files, matching the description in the question.