Which of the following best describes how computer protection stops malware.

Question

BlackTom AI · Accepted Answer

Antimalware (antivirus) software scans files and running processes, compares them to known-malware signatures and heuristic behaviors, and when a match or suspicious pattern is found it quarantines or deletes the threat.

1) Relevant knowledge points and concepts
- Malware: harmful software (viruses, trojans, ransomware) that infects files or processes.
- Antivirus/antimalware tools: perform signature-based detection (match known malware fingerprints) and heuristic/behavioral analysis (detect suspicious actions).
- Actions on detection: quarantine (isolate the file so it cannot run) or delete (remove the file); some tools also repair or restore files.
- Other protections: authentication (usernames/passwords), access control (permissions), and firewalls (filter network traffic) each protect different aspects but do not themselves scan for and remove malware.

2) Step-by-step reasoning process
- Step 1: The antimalware engine scans files, boot sectors, and memory in real time or during scheduled scans.
- Step 2: It compares file signatures to its database and applies heuristics to detect unknown threats.
- Step 3: If a scan identifies malware, the software isolates the item by moving it to quarantine or removes it (deletes) to prevent execution and further damage.
- Step 4: This action directly stops the malware from continuing to harm the system.

3) Intermediate steps (no numeric calculation required)
- Scan → Match/heuristic detection → Decision (quarantine/delete/repair) → Prevent execution/spread.

4) Why the correct answer is correct
Option c explicitly describes scanning the device and quarantining or deleting found malware, which matches how antimalware software directly stops malware by detection and containment/removal.

5) Why other options are incorrect
- a. Describes user account creation and passwords (authentication), which does not detect or remove malware.
- b. Describes access control/permissions, which limit user actions but do not actively scan for or remove malware.
- d. Describes a firewall filtering unsolicited network traffic; this can reduce exposure but does not scan device files for malware or quarantine infected files.

6) Conclusion
Therefore, option c is correct: the protection scans the device for malware and quarantines or deletes any found — this matches the provided answer.

Which of the following best describes how computer protection stops malware.单项选择题

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