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Cybersecurity and Blockchain

Description: This quiz covers the fundamentals of cybersecurity and blockchain technology, including key concepts, threats, and applications.
Number of Questions: 15
Created by:
Tags: cybersecurity blockchain cryptography security
Attempted 0/15 Correct 0 Score 0

What is the primary purpose of cybersecurity?

  1. To protect digital information and systems from unauthorized access, use, disclosure, disruption, modification, or destruction.

  2. To ensure the privacy of personal data.

  3. To prevent cyberattacks.

  4. To monitor and respond to security incidents.


Correct Option: A
Explanation:

Cybersecurity aims to safeguard digital assets, including information, systems, networks, and devices, from unauthorized access, use, disclosure, disruption, modification, or destruction.

Which of the following is NOT a common type of cyberattack?

  1. Phishing

  2. Malware

  3. Denial-of-service (DoS)

  4. Man-in-the-middle (MitM)


Correct Option: A
Explanation:

Phishing is a type of social engineering attack that attempts to trick individuals into revealing sensitive information or taking actions that compromise their security. Malware, DoS, and MitM are all common types of cyberattacks that target systems and networks.

What is the process of encrypting and decrypting data called?

  1. Cryptography

  2. Steganography

  3. Hashing

  4. Digital signature


Correct Option: A
Explanation:

Cryptography is the practice of using mathematical algorithms to encrypt and decrypt data, ensuring its confidentiality and integrity.

Which of the following is a key concept in blockchain technology?

  1. Decentralization

  2. Transparency

  3. Immutability

  4. All of the above


Correct Option: D
Explanation:

Blockchain technology is characterized by decentralization, transparency, and immutability. Decentralization means that there is no central authority controlling the blockchain, transparency allows all participants to view the entire blockchain, and immutability ensures that once data is added to the blockchain, it cannot be altered.

What is the role of a hash function in blockchain technology?

  1. To convert data into a unique and fixed-size string.

  2. To verify the integrity of data.

  3. To create a digital signature.

  4. All of the above


Correct Option: D
Explanation:

Hash functions are used in blockchain technology to convert data into a unique and fixed-size string, verify the integrity of data, and create digital signatures.

Which of the following is an application of blockchain technology?

  1. Cryptocurrencies

  2. Supply chain management

  3. Voting systems

  4. All of the above


Correct Option: D
Explanation:

Blockchain technology has various applications, including cryptocurrencies, supply chain management, voting systems, and more.

What is the purpose of a digital signature in cybersecurity?

  1. To authenticate the identity of a sender.

  2. To ensure the integrity of a message.

  3. To provide non-repudiation.

  4. All of the above


Correct Option: D
Explanation:

A digital signature serves multiple purposes in cybersecurity: it authenticates the identity of a sender, ensures the integrity of a message by detecting any unauthorized changes, and provides non-repudiation, meaning the sender cannot deny sending the message.

Which of the following is a common defense mechanism against cyberattacks?

  1. Firewalls

  2. Intrusion detection systems (IDS)

  3. Antivirus software

  4. All of the above


Correct Option: D
Explanation:

Firewalls, intrusion detection systems, and antivirus software are all commonly used defense mechanisms to protect systems and networks from cyberattacks.

What is the term for an unauthorized attempt to access or use a computer system or network?

  1. Hacking

  2. Cracking

  3. Phishing

  4. Malware


Correct Option: A
Explanation:

Hacking refers to the unauthorized attempt to access or use a computer system or network, often with malicious intent.

Which of the following is a type of malware that encrypts files and demands a ransom payment to decrypt them?

  1. Virus

  2. Trojan horse

  3. Ransomware

  4. Worm


Correct Option: C
Explanation:

Ransomware is a type of malware that encrypts files on a victim's computer and demands a ransom payment to decrypt them.

What is the term for a network of computers infected with malware and controlled by a single entity?

  1. Botnet

  2. Zombie network

  3. DDoS network

  4. Malware network


Correct Option: A
Explanation:

A botnet is a network of computers infected with malware and controlled by a single entity, often used to launch cyberattacks or spread malware.

Which of the following is a common method used to protect sensitive data during transmission?

  1. Encryption

  2. Hashing

  3. Steganography

  4. Digital signature


Correct Option: A
Explanation:

Encryption is a common method used to protect sensitive data during transmission by converting it into an unreadable format.

What is the term for a security measure that involves restricting access to certain resources or information based on specific criteria?

  1. Authentication

  2. Authorization

  3. Encryption

  4. Non-repudiation


Correct Option: B
Explanation:

Authorization is a security measure that involves restricting access to certain resources or information based on specific criteria, such as user roles or permissions.

Which of the following is a type of cyberattack that involves flooding a target system or network with excessive traffic to disrupt its normal operation?

  1. Phishing

  2. Malware

  3. Denial-of-service (DoS)

  4. Man-in-the-middle (MitM)


Correct Option: C
Explanation:

A denial-of-service (DoS) attack involves flooding a target system or network with excessive traffic to disrupt its normal operation.

What is the term for a security measure that involves monitoring and analyzing system logs and events to detect suspicious activities?

  1. Intrusion detection system (IDS)

  2. Firewall

  3. Antivirus software

  4. Security information and event management (SIEM)


Correct Option: A
Explanation:

An intrusion detection system (IDS) is a security measure that involves monitoring and analyzing system logs and events to detect suspicious activities that may indicate a security breach.

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