Free Practice Questions for CompTIA CS0-003 Exam

An SLA, or Service Level Agreement, is a contract between a service provider and its customers that documents what services the provider will furnish and defines the service standards the provider is obligated to meet. In the scenario described, the missed incident response deadline is a clear indicator of an SLA violation. An SLA usually outlines the metrics by which service is measured as well as remedies or penalties should agreed-upon service levels not be achieved. Unlike a KPI (Key Performance Indicator) which is a quantifiable measure used to evaluate the success of an organization, employee, etc., in meeting objectives for performance, or an MOU (Memorandum of Understanding) which is a formal agreement between two or more parties, an SLA is focused on the performance and quality metrics applicable to the service provided. SLO (Service Level Objective) is related and often part of an SLA, representing the specific measurable characteristics of the SLA such as availability, throughput, frequency, response time, or quality.

Email header analysis is one of the security operations tasks that are ideal for automation. Email header analysis involves checking the email header for various indicators of phishing or spamming attempts, such as sender address spoofing, mismatched domains, suspicious subject lines, or phishing confidence metrics. Email header analysis can be automated using tools or scripts that can parse and analyze email headers and take appropriate actions based on predefined rules or thresholds

A prioritized list of critical systems defined by executive leadership is the best option to use to develop a business continuity plan. A business continuity plan (BCP) is a system of prevention and recovery from potential threats to a company. The plan ensures that personnel and assets are protected and are able to function quickly in the event of a disaster1. A BCP should include a business impact analysis, which identifies the critical systems and processes that are essential for the continuity of the business operations, and the potential impacts of their disruption2. The executive leadership should be involved in defining the critical systems and their priorities, as they have the strategic vision and authority to make decisions that affect the whole organization3. A diagram of all systems and interdependent applications, a repository for all the software used by the organization, and a configuration management database in print at an off-site location are all useful tools for documenting and managing the IT infrastructure, but they are not sufficient to develop a comprehensive BCP that covers all aspects of the business continuity4. References: What Is a Business Continuity Plan (BCP), and How Does It Work?, Business continuity plan (BCP) in 8 steps, with templates, Business continuity planning | Business Queensland, Understanding the Essentials of a Business Continuity Plan

USB ports are a common attack vector that can be used to deliver malware, steal data, or compromise systems. The first step to mitigate this vulnerability is to check the configurations of the company assets and disable or restrict the USB ports if possible. This will prevent unauthorized devices from being connected and reduce the attack surface. The other options are also important, but they are not the first priority in this scenario.

To determine which system to remediate first using only CVSS vectors, the analyst should prioritize the vulnerability that is most severe and most easily exploitable, especially when it is exploitable over the network and requires no privileges and no user interaction.

The Web server has the most dangerous combination of exploitability and impact:

Attack Vector = Network (AV:N) → exploitable remotely over a network

Attack Complexity = Low (AC:L) → no special conditions required

Privileges Required = None (PR:N) → attacker doesn’t need credentials

User Interaction = None (UI:N) → no user action required

Impact = High for Confidentiality, Integrity, and Availability (C:H / I:H / A:H) → full compromise potential

The Sybex CySA+ Study Guide explains that CVSS provides a 0–10 severity score and that analysts must be able to interpret key metrics like Attack Vector, Attack Complexity, Privileges Required, User Interaction, and Impact.

The All-in-One guide defines Attack Vector and notes that the more remote the vector, the higher the score (Network is remotely exploitable).

And Secbay Press states that organizations use CVSS as a basis for prioritization, typically addressing higher scores first.

Exact extract (Secbay Press): “Organizations often use CVSS scores as a basis for prioritizing vulnerabilities, addressing those with higher scores first.”

Why the other assets are lower priority than the Web server (based on the vectors)

File server (AV:L) is local attack vector, meaning the attacker must already have local access; that generally reduces priority compared to a remotely exploitable (AV:N) issue. (Attack vector definitions and scoring emphasize Network vs Local distinctions.)

Mail server (AC:H) requires high attack complexity, lowering exploitability compared to the Web server’s AC:L.

Domain controller (PR:R, UI:R) requires privileges and user interaction, which lowers exploitability compared to PR:N/UI:N on the Web server.

Bottom line: The Web server is the most immediately dangerous because it is remotely exploitable (AV:N) with low complexity (AC:L), requires no privileges (PR:N) and no user interaction (UI:N), and has high impact across C/I/A—making it the strongest candidate for first remediation under CVSS-based prioritization.

References (CompTIA CySA+ CS0-003 documents / study guides used):

Secbay Press, CompTIA CySA+ Exam Prep Guide (CS0-003): CVSS used to prioritize; higher scores addressed first

Mike Chapple & David Seidl, CompTIA CySA+ Study Guide (CS0-003): CVSS metrics and interpretation (AV/AC/PR/UI/Impact) and severity score concept

Mya Heath et al., CompTIA CySA+ All-in-One Exam Guide (CS0-003): Attack Vector/Attack Complexity definitions; remote vectors score higher

 Select the command that generated the output in tab 1:

netstat -bo

 Select the command that generated the output in tab 2:

tasklist

 Identify the file responsible for the malicious behavior:

cmd.exe

Select the command that generated the output in tab 1: The output in tab 1 displays active network connections, which can be generated using the netstat command with options to display the owning process ID.

Select the command that generated the output in tab 1:

netstat -bo

Select the command that generated the output in tab 2: The output in tab 2 lists the running processes with their PIDs and memory usage, which can be generated using the tasklist command.

Select the command that generated the output in tab 2:

tasklist

Identify the file responsible for the malicious behavior: To identify the malicious file, we compare the hashes of the current files against the baseline hashes. From the provided data:

The hash for cmd.exe in the current state (tab 3) is 372ab227fd5ea779c211a1451881d1e1.

The baseline hash for cmd.exe (tab 4) is a2cdef1c445d3890cc3456789058cd21.

Since these hashes do not match, cmd.exe is the file responsible for the malicious behavior.

Before taking any action, the SOC analyst should first verify if the Indicators of Compromise (IoC) and Tactics, Techniques, and Procedures (TTPs) reported are relevant to the organization’s environment. This involves checking if the vulnerable application or version is actually in use. As per CompTIA’s CySA+ guidelines, relevance verification helps in prioritizing resources and response actionseffectively, ensuring that time is not wasted on threats that do not impact the organization. Options A, B, and D are important subsequent steps if the threat is deemed relevant.

A HTTP/404 error code means that the requested page or resource was not found on the web server. This could be caused by various reasons, such as incorrect URLs, moved or deleted pages, missing assets, or server misconfigurations123. The analyst should first identify the source of the requests and examine the related activity to determine if they are legitimate or malicious, and what actions need to be taken to resolve the issue. The other options are either premature or irrelevant without further investigation. References: 1: 404 Page Not Found Error: What It Is and How to Fix It 2: 404 Error Code: What Causes Them and How To Fix It 3: About 404 errors and how to Troubleshoot it?

Thepost-incident review processhelps an organization identify gaps in its response and security posture. Assigning different departmental groups ensures that flaws inspecific work areas (such as IT, HR, or legal teams)are identified and addressed​.

Option Bis incorrect because not all staff need exposure; the review focuses on relevant stakeholders.

Option Cis a part of the process, but the main goal is improvement, not just playbook verification.

Option D(cross-training) is a benefit but not the main objective.

Thus,A is the best answerbecause it focuses on identifyingflaws in specific areas of incident management.

Regular expressions are powerful tools for searching text based on specific patterns, making them ideal for parsing Linux log files to detect security events with repeatable patterns. In Bash, regular expressions can be used in commands like grep or awk to efficiently filter log data. CompTIA CySA+emphasizes the use of regular expressions in log analysis for pattern matching, a common requirement for identifying suspicious activities in log files. Options B, C, and D are less suited for this specific task due to their limited pattern-matching capabilities or platform constraints.