Match each malware type in List I with its definition in List II. List I:…
2024
Match each malware type in List I with its definition in List II.
List I: Malware type | List II: Definition |
|---|---|
A. Polymorphic virus | I. A seemingly useful program that contains hidden harmful program code |
B. Metamorphic virus | II. Changes its signature with each copy made during replication |
C. Trojan horse | III. Malware that spreads copies of itself through a network without user interaction |
D. Worm | IV. Completely rewrites its own code each time it replicates, sometimes changing its behaviour |
Choose the correct answer from the options given below.
Answer: C. A–II, B–IV, C–I, D–III — ConceptMalware is classified by how it is delivered and how it reproduces or alters its code. A virus depends on a host and may change its code…
- A.
A–II, B–I, C–IV, D–III
- B.
A–III, B–IV, C–I, D–II
- C.
A–II, B–IV, C–I, D–III
- D.
A–I, B–III, C–IV, D–II
Show answer & explanation
Correct answer: C
Concept
Malware is classified by how it is delivered and how it reproduces or alters its code. A virus depends on a host and may change its code representation, whereas a worm propagates independently across networks.
A polymorphic virus changes its decryptor or signature while retaining its underlying logic; a metamorphic virus rewrites its own body. A Trojan horse hides malicious code inside an apparently useful program.
Application
Malware type | Match | Reason |
|---|---|---|
A. Polymorphic virus | II | Its observable signature changes across replicated copies. |
B. Metamorphic virus | IV | Its own code is rewritten during replication and its behaviour may also change. |
C. Trojan horse | I | It appears useful while carrying hidden harmful code. |
D. Worm | III | It spreads copies through a network without requiring user interaction. |
Cross-check and contrast
Signature variation identifies polymorphism; full code-body rewriting identifies metamorphism.
Disguised delivery identifies a Trojan horse; autonomous network propagation identifies a worm.
Therefore, the matching is A–II, B–IV, C–I, D–III.