EC-Council 112-12 問題練習

Question No : 1
Which two factors improve antivirus software efficiency?

• A.Frequent updates and real-time protection
• B.Increased CPU performance and reduced scans
• C.Uninstalling unused software and firewalls
• D.Disabling non-essential system processes

答えを確認する

正解:
Explanation:
Regular updates and real-time protection keep antivirus software prepared for current threats and ensure constant monitoring.

Question No : 2
What is the best method to remove stubborn malware from a system?

• A.Reinstalling the operating system.
• B.Running an antivirus scan in safe mode.
• C.Disabling internet connectivity.
• D.Restarting the system in normal mode.

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正解:
Explanation:
Running antivirus software in safe mode helps remove malware by preventing it from running during the scan.

Question No : 3
What is the primary risk of not updating antivirus software regularly?

• A.Slower system performance.
• B.Inability to detect new types of malware.
• C.Reduced file storage capacity.
• D.Increased encryption overhead.

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正解:
Explanation:
Outdated antivirus software lacks recognition of the latest malware signatures, leaving systems vulnerable to emerging threats.

Question No : 4
Which two steps should be taken to ensure antivirus effectiveness?

• A.Schedule regular scans and keep software updated.
• B.Disable real-time protection and use manual scans.
• C.Remove software firewalls and enable default settings.
• D.Install multiple antivirus programs for redundancy.

答えを確認する

正解:
Explanation:
Regular scans and updates keep antivirus software effective against new and existing threats.

Question No : 5
What is the purpose of real-time scanning in antivirus software?

• A.To scan the system only during idle times.
• B.To monitor and detect threats as they occur.
• C.To analyze encrypted files for malware.
• D.To speed up the system’s processing time.

答えを確認する

正解:
Explanation:
Real-time scanning continuously monitors system activity to identify and neutralize threats immediately.

Question No : 6
Which type of malware is designed to track keyboard input?

• A.Ransomware
• B.Keylogger
• C.Worm
• D.Trojan horse

答えを確認する

正解:
Explanation:
Keyloggers record keystrokes to capture sensitive information, such as passwords and financial details.

Question No : 7
What is the role of a quarantine feature in antivirus software?

• A.Deleting all detected malware files.
• B.Isolating suspicious files to prevent them from running.
• C.Backing up infected files for recovery.
• D.Encrypting files to protect them from malware.

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正解:
Explanation:
Quarantine isolates potentially harmful files, preventing them from executing while allowing safe analysis or deletion.

Question No : 8
What is the primary difference between a virus and a worm?

• A.A virus replicates only via user interaction, while a worm spreads automatically.
• B.A virus targets hardware, while a worm targets networks.
• C.A virus encrypts data, while a worm deletes files.
• D.A virus is easier to detect than a worm.

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正解:
Explanation:
A virus requires user interaction, such as running an infected file, while a worm spreads across networks automatically.

Question No : 9
What is the first step in the process of installing antivirus software?

• A.Running a full system scan.
• B.Checking the system for existing malware.
• C.Downloading the software from a trusted source.
• D.Updating the software definitions.

答えを確認する

正解:
Explanation:
The installation process begins with downloading antivirus software from a reliable source to ensure its integrity.

Question No : 10
How does adware affect a system?

• A.Encrypts system files until a ransom is paid.
• B.Displays unwanted advertisements, sometimes compromising privacy.
• C.Deletes critical system files.
• D.Modifies system settings to reduce performance.

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正解:
Explanation:
Adware generates unwanted advertisements and may collect user data to target personalized ads, affecting system usability.

Question No : 11
Which of the following is a step to prevent malware infections? (Choose two)

• A.Regularly update operating systems and software.
• B.Avoid using antivirus software to reduce system overhead.
• C.Open email attachments from unknown senders.
• D.Download software only from trusted sources.

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正解:
Explanation:
Keeping systems updated and downloading from trusted sources minimizes vulnerabilities that malware can exploit.

Question No : 12
Which type of malware modifies its code to avoid detection?

• A.Polymorphic malware
• B.Spyware
• C.Adware
• D.Keylogger

答えを確認する

正解:
Explanation:
Polymorphic malware frequently changes its code structure, making it harder for antivirus programs to detect.

Question No : 13
What should be done after installing antivirus software?

• A.Disconnect the system from the internet.
• B.Update the software and run a full system scan.
• C.Disable real-time scanning to improve performance.
• D.Perform a factory reset on the system.

答えを確認する

正解:
Explanation:
Updating antivirus software ensures it recognizes the latest threats, and running a full system scan identifies existing malware.

Question No : 14
Which two features are commonly found in antivirus software?

• A.Real-time scanning and scheduled scans
• B.Data encryption and physical security
• C.Intrusion detection and firewall settings
• D.Multi-factor authentication and password management

答えを確認する

正解:
Explanation:
Antivirus software often includes real-time scanning to detect threats as they occur and scheduled scans for regular system checks.

Question No : 15
What is a Trojan horse in the context of malware?

• A.A type of malware that spreads without user interaction.
• B.Malware disguised as legitimate software.
• C.A malicious program that targets network hardware.
• D.A virus embedded in hardware devices.

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正解:
Explanation:
Trojan horses appear as legitimate applications but execute malicious activities when run.