Incident response lifecycle in Cybersecurity - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding the Phases of Incident Response Lifecycle

Which of the following lists the correct order of the main phases in the incident response lifecycle?

A Preparation, Detection and Analysis, Containment, Eradication and Recovery, Post-Incident Activity

B Detection and Analysis, Preparation, Containment, Post-Incident Activity, Eradication and Recovery

C Preparation, Containment, Detection and Analysis, Eradication and Recovery, Post-Incident Activity

D Detection and Analysis, Containment, Preparation, Eradication and Recovery, Post-Incident Activity

💡 Hint

Think about what must happen before an incident occurs and what happens after it is resolved.

The incident response lifecycle starts with Preparation to get ready, then Detection and Analysis to find and understand the incident, followed by Containment to limit damage, Eradication and Recovery to remove threats and restore systems, and finally Post-Incident Activity to learn and improve.

📋 Factual

intermediate

Key Objective of the Containment Phase

What is the primary goal during the Containment phase of the incident response lifecycle?

A To limit the spread and impact of the incident

B To identify and understand the nature of the incident

C To restore systems to normal operation

D To document lessons learned after the incident

💡 Hint

Think about what you want to achieve immediately after detecting an incident to prevent further damage.

The Containment phase focuses on stopping the incident from spreading and minimizing its impact on the organization.

🔍 Analysis

advanced

Analyzing Incident Response Actions

During an incident, the team isolates affected systems but does not immediately remove the malware. Which phase does this action belong to, and why?

A Eradication, because removing malware is the main goal of this phase

B Containment, because isolating systems prevents further damage while preserving evidence

C Detection and Analysis, because identifying malware requires isolation

D Post-Incident Activity, because isolation is part of reviewing the incident

💡 Hint

Consider the difference between stopping damage and removing threats.

Isolating affected systems is part of Containment to stop the incident from spreading while keeping evidence intact for analysis and later eradication.

❓ Comparison

advanced

Difference Between Eradication and Recovery

Which statement best describes the difference between the Eradication and Recovery phases in the incident response lifecycle?

A Eradication is about detecting the incident, while Recovery is about containing it

B Eradication involves documenting the incident, while Recovery involves analyzing the cause

C Eradication focuses on removing the threat, while Recovery focuses on restoring systems to normal operation

D Eradication and Recovery are the same phase with different names

💡 Hint

Think about what happens after the threat is removed but before normal work resumes.

Eradication removes the root cause and threats, while Recovery restores and validates systems to normal working condition.

❓ Reasoning

expert

Importance of Post-Incident Activity

Why is the Post-Incident Activity phase critical to improving an organization's security posture?

A It is used to restore systems to their original state

B It allows the team to celebrate success and move on quickly

C It focuses on immediate containment of ongoing incidents

D It helps identify weaknesses and improve future incident response plans

💡 Hint

Consider how learning from past incidents can prevent future problems.

Post-Incident Activity reviews what happened, what worked, and what didn’t, helping the organization strengthen defenses and response strategies.