The correct answer is to use DBCC PAGE or fn_dblog to read the transaction log. These commands allow direct, low-level access to the log records, enabling the analyst to manually inspect the log sequence numbers (LSNs) and identify the exact point of the gap without relying on backup metadata. This is critical because a transaction log gap indicates missing or overwritten records, and standard backup commands like BACKUP LOG would only capture the active portion, potentially preserving the gap as-is rather than recovering the missing transactions. On the CHFI exam, this scenario tests your understanding of SQL Server’s internal log structure and forensic preservation—common traps include assuming a simple log backup alone recovers the gap, or that restoring a full database backup fills the missing transactions. Remember the mnemonic “GAP = Get Active Pages” to recall that DBCC PAGE and fn_dblog are your tools for reading the raw log, while BACKUP LOG preserves what remains for chain-of-custody.
CHFI Database and Application Forensics Practice Question
This CHFI practice question tests your understanding of database and application forensics. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
During a database forensic investigation, an analyst finds that the SQL Server transaction log contains gaps. Which TWO actions should the analyst take to preserve evidence integrity and recover missing transactions?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Perform a transaction log backup using BACKUP LOG
Option A is correct because performing a transaction log backup using BACKUP LOG captures the active portion of the transaction log, preserving evidence of all committed and uncommitted transactions. This ensures that the log is not truncated and that the forensic integrity of the transaction history is maintained for later analysis. Without this backup, subsequent operations could overwrite or lose critical transaction records.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Perform a transaction log backup using BACKUP LOG
Why this is correct
Preserves the current log state for analysis.
Related concept
Read the scenario before looking for a memorised answer.
✗
Run DBCC CHECKDB to verify database consistency
Why it's wrong here
Does not recover log gaps.
✗
Restart the SQL Server service to flush pending transactions
Why it's wrong here
May overwrite log buffer data.
✗
Truncate the transaction log to free space
Why it's wrong here
Destroys potential evidence.
✓
Use DBCC PAGE or fn_dblog to read the transaction log
Why this is correct
Allows direct examination of log records.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the misconception that restarting the service or running consistency checks will help recover transactions, when in fact these actions can destroy or overwrite the very evidence needed for forensic analysis.
Detailed technical explanation
How to think about this question
The SQL Server transaction log is a write-ahead log (WAL) that records every modification before it is written to the data files. The fn_dblog function reads the log directly from the transaction log file (LDF), allowing forensic analysts to inspect individual log records (LOP_BEGIN_XACT, LOP_COMMIT_XACT, etc.) without altering the log. In real-world scenarios, an attacker may delete or modify data, and the transaction log can reveal the exact sequence of operations, including the original values before the change, even if the database itself has been tampered with.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the CHFI exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
Database and Application Forensics — This question tests Database and Application Forensics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Perform a transaction log backup using BACKUP LOG — Option A is correct because performing a transaction log backup using BACKUP LOG captures the active portion of the transaction log, preserving evidence of all committed and uncommitted transactions. This ensures that the log is not truncated and that the forensic integrity of the transaction history is maintained for later analysis. Without this backup, subsequent operations could overwrite or lose critical transaction records.
What should I do if I get this CHFI question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This CHFI practice question is part of Courseiva's free EC-Council certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CHFI exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.