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Free CompTIA CySA+ CS0-003 Practice Test

Prepare for the CompTIA CySA+ CS0-003 exam with this free practice test. Randomly generated and customizable, this test allows you to choose the number of questions.

  • Questions: 15
  • Time: 15 minutes (60 seconds per question)
  • Included Objectives:
    Security Operations
    Vulnerability Management
    Incident Response and Management
    Reporting and Communication
Change
Question 1 of 15

During an incident response operation, a compromised server needs to be restored to a trusted state. Describe the proper action to re-image the server effectively.

  • Run a comprehensive antivirus program to clean the malware and then update security patches.

  • Install the latest operating system patches and restore system settings from a recent backup.

  • Perform a system restore from the compromised server's own backup files.

  • Erase the current system and install a pre-configured, verified clean image

Question 2 of 15

A financial services company has recently suffered from a ransomware attack that has impacted a critical server which is not upgradable to the latest security patches due to legacy software dependencies. The incident response team is considering various options for mitigating the risk of this server being compromised again. Which of the following would be the BEST form of a compensating control given the inability to patch the server?

  • Implement network segmentation to isolate the critical server from the broader network.

  • Enforce frequent password rotation for all users with access to the critical server.

  • Schedule regular patching for the critical server.

  • Produce and store encrypted backups of the server on a bi-weekly basis.

Question 3 of 15

During a code audit of a legacy application, a security analyst encounters a function that allocates an array of integers to store results from a user-supplied input. The size of the array is predetermined by a constant value, and the function failed to check if the number of inputs exceeded this size before processing. As a consequence, excess data could overwrite other memory locations. Which specific type of vulnerability is most likely being introduced in this application?

  • Heap Overflow

  • Integer Overflow

  • Buffer Overflow

  • Stack Overflow

Question 4 of 15

During a forensic analysis of a breached system, what is the primary purpose of creating a forensic disk image?

  • To increase the speed of the forensic analysis by utilizing faster storage media

  • To preserve the integrity of the original data by ensuring it remains unaltered

  • To simplify the identification of Indicators of Compromise (IoCs)

  • To automatically detect malicious files on the system

Question 5 of 15

As a cybersecurity analyst, you discover that a critical database server is publicly accessible over the internet due to a misconfigured firewall. Which immediate action should you recommend to mitigate this vulnerability?

  • Reconfigure the firewall to restrict access to the database server.

  • Change the database server’s default administrative password.

  • Ensure the database server is using encrypted connections for all communications.

  • Install the latest security patches on the database server.

Question 6 of 15

A cybersecurity analyst discovers that a company's web application does not properly sanitize user input which could allow an attacker to execute unauthorized commands or access data. Which of the following mitigation techniques should the analyst recommend to address this specific software vulnerability?

  • Implementing role-based access control to prevent unauthorized command execution

  • Using parameterized queries to prevent malicious input from being executed as part of SQL commands

  • Applying input length restrictions to limit the amount of data accepted by the web application

  • Employing encrypted channels for all data transmissions to the web application

Question 7 of 15

When conducting vulnerability research for new threats in an application, which tool would allow for interactive debugging and is often used to analyze malware and develop exploits?

  • Immunity debugger

  • WireShark

  • GNU debugger (GDB)

  • Nessus

Question 8 of 15

When evaluating the effectiveness of an incident response team, which metric indicates the average amount of time it takes for the team to resolve an incident after it has been identified?

  • Critical vulnerabilities and zero-days

  • Mean time to remediate

  • Mean time to detect

  • Alert volume

Question 9 of 15

What is the primary purpose of conducting root cause analysis during post-incident activities?

  • To analyze the effectiveness of existing security controls

  • To compile evidence for legal proceedings

  • To identify the underlying causes of the incident

  • To determine the immediate impact on business operations

Question 10 of 15

What does 'scope' refer to in the process of incident response?

  • Determining the resources required for incident recovery.

  • Identifying the extent of the impact and affected systems.

  • Defining procedures for legal and regulatory compliance.

  • Establishing communication protocols within the incident response team.

Question 11 of 15

After a significant security breach, your organization is evaluating its incident response actions. As part of a lessons learned meeting, your team is discussing improvements to the preparation phase of the incident response plan to enhance future responses. What is the MOST valuable addition to this phase to ensure more effective handling of similar incidents?

  • Regularly revising the disaster recovery plan.

  • Purchasing more advanced intrusion detection systems.

  • Increasing the frequency of backup operations.

  • Conducting regular Tabletop exercises.

Question 12 of 15

Asset discovery processes that specifically target and identify network boundaries and exposed services can effectively reduce an organization's attack surface.

  • True

  • False

Question 13 of 15

During the recovery phase of an incident, you must restore a group of affected systems. All machines have a recent, verified clean backup available. However, you have been informed that a persistent threat actor had previously established a foothold in the network. What is the BEST step to ensure the re-imaging process prevents the actor from regaining access to the systems?

  • Perform a bare-metal restore and immediately reconnect systems to the network.

  • Only install the latest security patches on the systems prior to re-imaging processes.

  • Re-image systems with the clean backup and modify default credentials and access controls before reconnection.

  • Integrate additional monitoring tools during the re-imaging process to increase surveillance.

Question 14 of 15

A member of your team receives an urgent email from what appears to be a senior executive requesting sensitive financial information. The email implies that the request is confidential and needs to be handled discreetly. What type of attack is most likely occurring?

  • Vishing

  • Phishing

  • Pretexting

  • Business Email Compromise (BEC)

Question 15 of 15

Maintaining a proper chain of custody involves documenting every person who handled a piece of evidence and the reason for the transfer.

  • False

  • True