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CompTIA CySA+ (CS0-003)

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Practice exam for the CompTIA CySA+ CS0-003 certification. Covers security operations, vulnerability management, incident response and management, and reporting and communication.

⭐ Premium Updated Mar 2026

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Sample Questions — CompTIA CySA+ (CS0-003)

5 free sample questions from this practice exam. Correct answers are highlighted.

1. A SOC analyst is reviewing SIEM alerts and notices that log timestamps from a remote branch office are consistently 3 hours ahead of the SIEM server time. Which configuration issue is most likely causing this discrepancy?

A The remote branch office log sources are not synchronized to a common NTP server ✓ Correct
B The logging level on the remote branch office devices is set too high
C Network latency between the branch office and SIEM is causing log delivery delays
D The SIEM log ingestion pipeline is processing events out of order

2. A security analyst needs to investigate a potential intrusion on a Windows workstation. Which Windows Registry hive should the analyst examine to find recently executed programs that do not appear in standard process lists?

A HKLM\SYSTEM
B HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\UserAssist ✓ Correct
C HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
D HKLM\SAM

3. An organization wants to implement a solution that automatically executes a series of predefined response actions when a specific SIEM alert fires, such as isolating an endpoint and blocking an IP at the firewall. Which technology best fulfills this requirement?

A Endpoint Detection and Response (EDR)
B Security Information and Event Management (SIEM)
C Security Orchestration, Automation, and Response (SOAR) ✓ Correct
D Intrusion Detection System (IDS)

4. A threat analyst observes that an internal host is making outbound DNS queries for randomly generated 32-character subdomains of a single domain at regular 60-second intervals. Which type of malicious activity does this behavior most likely indicate?

A Command-and-control (C2) beaconing using DNS tunneling ✓ Correct
B Internal network port scanning
C Data exfiltration over HTTP
D Distributed denial-of-service amplification attack

5. A SOC analyst captures network traffic and wants to filter for all TCP SYN packets directed at a web server to identify potential reconnaissance activity. Which Wireshark display filter should the analyst use?

A tcp.flags == 0x002
B tcp.flags.syn == 1 && tcp.flags.ack == 0 ✓ Correct
C tcp.port == 80
D ip.dst == 192.168.1.100 && tcp

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Information

Questions 340
Time 2h 45min
Difficulty Medium
Minimum Score 75.00%


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