Almost all MCQs of Computer

Cyber Security Solved MCQs

 

  1. Which of the following is NOT considered a common cybersecurity threat? A) Phishing attacks B) Social engineering C) Regular software updates D) Malware

    Answer: C) Regular software updates

    Explanation: Regular software updates actually help in strengthening cybersecurity by patching vulnerabilities. The other options are all common cybersecurity threats.

  2. What is the primary purpose of a firewall in a network? A) Encrypting data transmissions B) Monitoring network traffic C) Filtering and controlling incoming and outgoing traffic D) Detecting and removing viruses from the network

    Answer: C) Filtering and controlling incoming and outgoing traffic

    Explanation: Firewalls are designed to filter and control the flow of network traffic based on predetermined security rules. They help in preventing unauthorized access and protecting against various cyber threats.

  3. What type of cyber attack involves an attacker intercepting communication between two parties and altering it to their advantage? A) Denial of Service (DoS) attack B) Man-in-the-Middle (MitM) attack C) SQL injection attack D) Ransomware attack

    Answer: B) Man-in-the-Middle (MitM) attack

    Explanation: In a MitM attack, the attacker secretly intercepts and possibly alters the communication between two parties without their knowledge. This allows the attacker to eavesdrop on sensitive information or manipulate the communication.

  4. Which encryption method uses the same key for both encryption and decryption? A) Asymmetric encryption B) Public-key encryption C) Symmetric encryption D) Hashing

    Answer: C) Symmetric encryption

    Explanation: Symmetric encryption uses a single key for both encryption and decryption processes. Asymmetric encryption (option A) uses different keys for encryption and decryption.

  5. What is the purpose of a VPN (Virtual Private Network)? A) To block unauthorized access to a network B) To hide the user's identity online C) To create a secure connection over an unsecured network D) To encrypt all data stored on a computer

    Answer: C) To create a secure connection over an unsecured network

    Explanation: A VPN encrypts the data transmitted between the user's device and the VPN server, creating a secure and private connection, especially over unsecured networks like public Wi-Fi.

These questions cover various aspects of cybersecurity, including threats, security measures, encryption, and network security.

  1. Which of the following is an example of a social engineering attack? A) Distributed Denial of Service (DDoS) B) Cross-site scripting (XSS) C) Spear phishing D) Buffer overflow

    Answer: C) Spear phishing

    Explanation: Spear phishing is a type of social engineering attack where attackers target specific individuals or organizations with fraudulent emails to steal sensitive information or spread malware.

  2. What is the purpose of multi-factor authentication (MFA)? A) To encrypt network traffic B) To monitor system logs C) To verify the identity of users with more than one piece of evidence D) To protect against denial of service attacks

    Answer: C) To verify the identity of users with more than one piece of evidence

    Explanation: MFA adds an extra layer of security by requiring users to provide multiple forms of identification (such as passwords, biometrics, or security tokens) before granting access to a system or application.

  3. Which of the following best describes a zero-day vulnerability? A) A vulnerability that has been known for a long time but remains unpatched B) A vulnerability that has not yet been discovered by hackers C) A vulnerability that has been exploited before a patch is available D) A vulnerability that only affects outdated software

    Answer: C) A vulnerability that has been exploited before a patch is available

    Explanation: Zero-day vulnerabilities are security flaws in software or hardware that are exploited by attackers before the developer/vendor releases a patch or solution to fix the issue.

  4. What is the main purpose of a Security Information and Event Management (SIEM) system? A) To encrypt sensitive data B) To detect and respond to cybersecurity threats in real-time C) To prevent unauthorized access to a network D) To perform penetration testing

    Answer: B) To detect and respond to cybersecurity threats in real-time

    Explanation: SIEM systems collect and analyze security-related data from various sources to detect and respond to cybersecurity threats in real-time, helping organizations to manage security incidents more effectively.

  5. Which type of malware is designed to encrypt files on a victim's system and demand a ransom for their decryption? A) Trojan horse B) Rootkit C) Ransomware D) Worm

    Answer: C) Ransomware

    Explanation: Ransomware is a type of malware that encrypts files on a victim's system and demands payment (usually in cryptocurrency) from the victim to decrypt the files.

  1. What is the purpose of a honey pot in cybersecurity? A) To detect and block malware infections B) To lure attackers into a controlled environment C) To secure wireless networks D) To encrypt sensitive data

    Answer: B) To lure attackers into a controlled environment

    Explanation: A honey pot is a decoy system designed to attract and monitor malicious activity. It helps security professionals study attack techniques and gather information about attackers.

  2. Which of the following is a common technique used in a SQL injection attack? A) Sending unsolicited emails with malicious attachments B) Exploiting vulnerabilities in web applications to execute unauthorized SQL queries C) Intercepting and altering communication between two parties D) Infecting a system with malware to gain unauthorized access

    Answer: B) Exploiting vulnerabilities in web applications to execute unauthorized SQL queries

    Explanation: In a SQL injection attack, attackers exploit vulnerabilities in web applications by inserting malicious SQL code into input fields to execute unauthorized SQL queries, potentially gaining access to sensitive data or manipulating the database.

  3. What does the term "phishing" refer to in the context of cybersecurity? A) Gaining unauthorized access to a system by guessing passwords B) Encrypting files on a victim's system and demanding a ransom C) Sending fraudulent emails or messages to deceive individuals into revealing sensitive information D) Exploiting security vulnerabilities to gain remote access to a system

    Answer: C) Sending fraudulent emails or messages to deceive individuals into revealing sensitive information

    Explanation: Phishing is a social engineering technique where attackers send emails or messages disguised as legitimate entities to trick individuals into providing sensitive information such as passwords, credit card numbers, or personal details.

  4. Which of the following is NOT a recommended practice to enhance password security? A) Using long and complex passwords B) Sharing passwords with trusted colleagues C) Enabling multi-factor authentication D) Regularly updating passwords

    Answer: B) Sharing passwords with trusted colleagues

    Explanation: Sharing passwords, even with trusted colleagues, undermines password security. It is not recommended as it increases the risk of unauthorized access to accounts.

  5. What is the primary purpose of penetration testing? A) To identify and fix security vulnerabilities in a system B) To monitor network traffic for suspicious activities C) To encrypt data transmissions over a network D) To secure physical access to data centers

    Answer: A) To identify and fix security vulnerabilities in a system

    Explanation: Penetration testing, also known as ethical hacking, involves simulating cyber attacks to identify weaknesses in a system's defenses. The primary goal is to discover and address security vulnerabilities before malicious actors exploit them.

  1. Which of the following is an example of a passive cybersecurity defense mechanism? A) Intrusion Detection System (IDS) B) Firewall C) Anti-virus software D) Multi-factor authentication (MFA)

    Answer: A) Intrusion Detection System (IDS)

    Explanation: An IDS monitors network traffic for suspicious activity or known attack patterns but does not actively block or prevent such activity. Instead, it alerts administrators to potential security breaches.

  2. Which encryption protocol is commonly used to secure web traffic (HTTPS)? A) RSA B) AES C) SSL/TLS D) PGP

    Answer: C) SSL/TLS

    Explanation: SSL/TLS (Secure Sockets Layer/Transport Layer Security) is the protocol commonly used to encrypt and secure web traffic, including HTTPS connections between web servers and browsers.

  3. What is the purpose of a security token in multi-factor authentication (MFA)? A) To generate one-time passwords B) To store encrypted user credentials C) To verify the user's identity using biometric data D) To block unauthorized access attempts

    Answer: A) To generate one-time passwords

    Explanation: A security token is a physical device or software application that generates one-time passwords, typically synchronized with a server to provide an additional authentication factor in MFA.

  4. What is the main goal of a Distributed Denial of Service (DDoS) attack? A) To steal sensitive information from a target system B) To encrypt files on a victim's system and demand a ransom C) To disrupt or overload a target system or network D) To intercept and alter communication between two parties

    Answer: C) To disrupt or overload a target system or network

    Explanation: A DDoS attack aims to make a service, website, or network resource unavailable by overwhelming it with a flood of traffic from multiple sources, thereby causing disruption to legitimate users.

  5. Which of the following is a characteristic of a strong password? A) Short and easily memorable B) Contains only letters in lowercase C) Includes a combination of uppercase and lowercase letters, numbers, and special characters D) Consists of common dictionary words

    Answer: C) Includes a combination of uppercase and lowercase letters, numbers, and special characters

    Explanation: Strong passwords are complex and include a mix of uppercase and lowercase letters, numbers, and special characters, making them more resistant to brute-force attacks.

  1. What is the purpose of an Intrusion Prevention System (IPS)? A) To detect and block suspicious network traffic in real-time B) To encrypt data transmissions between two parties C) To monitor system logs for unauthorized access attempts D) To recover data after a security breach

    Answer: A) To detect and block suspicious network traffic in real-time

    Explanation: An Intrusion Prevention System (IPS) is a security solution that monitors network traffic for malicious activity and takes action to block or prevent identified threats in real-time.

  2. Which of the following is an example of biometric authentication? A) Using a PIN code B) Scanning a fingerprint C) Answering security questions D) Receiving a one-time password via SMS

    Answer: B) Scanning a fingerprint

    Explanation: Biometric authentication uses unique biological characteristics such as fingerprints, iris patterns, or facial features to verify an individual's identity.

  3. What does the term "zero trust" refer to in cybersecurity? A) Trusting all users and devices within a network perimeter B) Verifying the identity of users through multi-factor authentication C) Assuming that all users and devices, both inside and outside the network, are potentially hostile D) Implementing strong encryption to protect sensitive data

    Answer: C) Assuming that all users and devices, both inside and outside the network, are potentially hostile

    Explanation: Zero trust is a security model that assumes no entity, whether inside or outside the network perimeter, should be trusted by default. It requires continuous verification of identity and strict access controls.

  4. What is the primary goal of data loss prevention (DLP) software? A) To recover lost data from system backups B) To prevent unauthorized access to sensitive data C) To encrypt data transmissions over a network D) To detect and prevent the unauthorized transfer or leakage of sensitive data

    Answer: D) To detect and prevent the unauthorized transfer or leakage of sensitive data

    Explanation: Data loss prevention (DLP) software is designed to monitor, detect, and prevent the unauthorized transfer, sharing, or leakage of sensitive data both within and outside an organization's network.

  5. Which of the following is a characteristic of a phishing email? A) It contains strong encryption to protect sensitive information. B) It appears to be sent from a legitimate source but contains suspicious links or attachments. C) It is personalized and addresses the recipient by name. D) It is only sent to known contacts within an organization.

    Answer: B) It appears to be sent from a legitimate source but contains suspicious links or attachments.

    Explanation: Phishing emails often impersonate legitimate entities and contain deceptive links or attachments designed to trick recipients into revealing sensitive information or installing malware.

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  1. What is the purpose of a security policy in an organization? A) To encrypt sensitive data B) To define rules and guidelines for protecting information assets and resources C) To monitor network traffic for suspicious activities D) To recover data after a security breach

    Answer: B) To define rules and guidelines for protecting information assets and resources

    Explanation: A security policy outlines the rules, procedures, and guidelines that govern how an organization protects its information assets and resources, including data, systems, and networks.

  2. What type of attack involves an attacker attempting to guess a user's password by trying many possible combinations? A) Phishing attack B) Brute-force attack C) Man-in-the-Middle (MitM) attack D) SQL injection attack

    Answer: B) Brute-force attack

    Explanation: In a brute-force attack, an attacker systematically tries different combinations of characters (such as letters, numbers, and symbols) until they find the correct password or passphrase.

  3. Which of the following is NOT a common type of malware? A) Trojan horse B) Firewall C) Worm D) Ransomware

    Answer: B) Firewall

    Explanation: A firewall is a security device or software that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It is not a type of malware.

  4. What is the primary purpose of an SSL certificate? A) To encrypt data transmissions B) To block unauthorized access to a network C) To detect and remove viruses from a system D) To generate one-time passwords

    Answer: A) To encrypt data transmissions

    Explanation: An SSL (Secure Sockets Layer) certificate is a digital certificate that enables secure communication between a web browser and a web server by encrypting data transmitted over the network.

  5. Which of the following is an example of physical security controls? A) Intrusion Detection System (IDS) B) Encryption C) Security guards D) Multi-factor authentication (MFA)

    Answer: C) Security guards

    Explanation: Physical security controls are measures implemented to protect physical assets, facilities, and resources. Security guards are an example of physical security controls that monitor and protect physical access to premises.

  1. What is the purpose of a security patch? A) To monitor network traffic for suspicious activities B) To recover data after a security breach C) To detect and block malware infections D) To fix security vulnerabilities in software or hardware

    Answer: D) To fix security vulnerabilities in software or hardware

    Explanation: A security patch is a software update designed to fix known vulnerabilities or weaknesses in a program, operating system, or device to improve security and protect against potential threats.

  2. Which of the following is NOT considered a best practice for secure password management? A) Using the same password for multiple accounts B) Using a passphrase instead of a single word C) Enabling multi-factor authentication D) Changing passwords regularly

    Answer: A) Using the same password for multiple accounts

    Explanation: Using the same password for multiple accounts increases the risk of unauthorized access if one account is compromised. It is not considered a best practice for secure password management.

  3. What is the purpose of a security incident response plan? A) To prevent all security incidents from occurring B) To recover data after a security incident C) To detect security incidents in real-time D) To guide an organization's response to security incidents

    Answer: D) To guide an organization's response to security incidents

    Explanation: A security incident response plan outlines the steps an organization should take in the event of a security incident to minimize damage, restore normal operations, and prevent future incidents.

  4. Which of the following is a common method used to protect data at rest? A) Encrypting data transmissions over a network B) Implementing multi-factor authentication C) Using firewalls to monitor network traffic D) Encrypting data stored on storage devices

    Answer: D) Encrypting data stored on storage devices

    Explanation: Data at rest refers to data that is stored on storage devices such as hard drives, solid-state drives, or servers. Encrypting data at rest helps protect it from unauthorized access if the storage device is stolen or compromised.

  5. What is the primary goal of network segmentation? A) To encrypt data transmissions over a network B) To monitor system logs for suspicious activities C) To isolate different parts of a network to minimize the impact of security breaches D) To recover data after a security breach

    Answer: C) To isolate different parts of a network to minimize the impact of security breaches

    Explanation: Network segmentation involves dividing a computer network into smaller, isolated segments to control the flow of traffic and contain security breaches, limiting their impact on other parts of the network.

  6. Which of the following is NOT a common method used for authenticating users? A) Biometric authentication B) Single sign-on (SSO) C) Security tokens D) Denial of Service (DoS) attacks

    Answer: D) Denial of Service (DoS) attacks

    Explanation: Denial of Service (DoS) attacks are not a method used for authenticating users; rather, they are malicious attacks that attempt to disrupt or make a service unavailable to legitimate users.

  7. What is the purpose of a security audit? A) To recover data after a security breach B) To monitor system logs for suspicious activities C) To assess the effectiveness of an organization's security controls and policies D) To encrypt data transmissions over a network

    Answer: C) To assess the effectiveness of an organization's security controls and policies

    Explanation: A security audit involves evaluating an organization's security measures, controls, and policies to identify vulnerabilities, compliance issues, and

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