- A
Escape apostrophes in the input before building the SQL statement.
Why wrong: Manual escaping is fragile and often misses edge cases, encodings, and alternate injection paths.
- B
Use parameterized queries or prepared statements for the search filters.
Parameterized queries separate code from data, so user input is treated as values rather than executable SQL. This allows the search function to remain flexible while dramatically reducing injection risk. Prepared statements are the preferred fix because they address the root cause instead of relying on brittle string handling.
- C
Disable database error messages so attackers cannot see query details.
Why wrong: Hiding errors reduces information leakage but does not stop the injection vulnerability from existing.
- D
Place the application behind a VPN so only internal users can run searches.
Why wrong: Restricting network access lowers exposure, but insiders or compromised accounts could still inject SQL.
SQL Injection Prevention: Parameterized Queries
This SY0-701 practice question tests your understanding of threats, vulnerabilities, and mitigations. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
A development team wants to allow users to search orders by customer name and date range. Logs show the team currently concatenates the filter values into SQL strings. Which change best reduces SQL injection risk without removing the search feature?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use parameterized queries or prepared statements for the search filters.
Option B is correct because parameterized queries (also known as prepared statements) separate SQL logic from user data by sending the query structure and parameters independently to the database. This ensures that user-supplied filter values are always treated as data, never as executable SQL code, which completely prevents SQL injection even if the input contains malicious characters like apostrophes or SQL keywords.
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.
- ✗
Escape apostrophes in the input before building the SQL statement.
Why it's wrong here
Manual escaping is fragile and often misses edge cases, encodings, and alternate injection paths.
- ✓
Use parameterized queries or prepared statements for the search filters.
Why this is correct
Parameterized queries separate code from data, so user input is treated as values rather than executable SQL. This allows the search function to remain flexible while dramatically reducing injection risk. Prepared statements are the preferred fix because they address the root cause instead of relying on brittle string handling.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Disable database error messages so attackers cannot see query details.
Why it's wrong here
Hiding errors reduces information leakage but does not stop the injection vulnerability from existing.
- ✗
Place the application behind a VPN so only internal users can run searches.
Why it's wrong here
Restricting network access lowers exposure, but insiders or compromised accounts could still inject SQL.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose input escaping (Option A) because it seems like a direct fix for the apostrophe problem, but they fail to recognize that parameterized queries are the only comprehensive defense that eliminates the entire class of SQL injection vulnerabilities regardless of input format.
Detailed technical explanation
How to think about this question
Under the hood, parameterized queries work by sending the SQL statement with placeholders (e.g., `?` in ODBC/JDBC or `$1` in PostgreSQL) to the database server, which compiles the query plan before any user input is bound. This means the database engine knows the exact structure of the query in advance, and the bound parameters are always treated as literal values, making it impossible for input to alter the SQL syntax. In real-world scenarios, even a single unparameterized dynamic SQL statement in a stored procedure or ORM query can lead to full database compromise, as demonstrated by the 2017 Equifax breach where a vulnerable web application allowed attackers to execute arbitrary SQL commands.
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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
What to study next
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FAQ
Questions learners often ask
What does this SY0-701 question test?
Threats, Vulnerabilities, and Mitigations — This question tests Threats, Vulnerabilities, and Mitigations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use parameterized queries or prepared statements for the search filters. — Option B is correct because parameterized queries (also known as prepared statements) separate SQL logic from user data by sending the query structure and parameters independently to the database. This ensures that user-supplied filter values are always treated as data, never as executable SQL code, which completely prevents SQL injection even if the input contains malicious characters like apostrophes or SQL keywords.
What should I do if I get this SY0-701 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
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Same concept, more angles
2 more ways this is tested on SY0-701
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A security analyst discovers that an organization's web application is vulnerable to SQL injection. The application uses a legacy database driver that does not support parameterized queries. Which of the following is the BEST mitigation to prevent this vulnerability?
medium- A.Implement a web application firewall (WAF) to filter malicious input.
- ✓ B.Update the database driver to a version that supports parameterized queries.
- C.Encode all user input using HTML encoding.
- D.Disable error messages that reveal database schema.
Why B: Option B is correct because the root cause of the SQL injection vulnerability is the legacy database driver that does not support parameterized queries. Updating the driver to a modern version that supports parameterized queries (also known as prepared statements) allows the application to separate SQL logic from user-supplied data, effectively preventing SQL injection at the database layer. This addresses the fundamental flaw rather than relying on external filtering or encoding.
Variation 2. A security analyst is reviewing the results of a dynamic application security test (DAST) on a new e-commerce application. The report indicates that the application's product search functionality is vulnerable to blind SQL injection. The analyst is tasked with recommending a remediation to the development team. The developers currently concatenate user input directly into SQL queries. Which of the following recommendations would most effectively and permanently mitigate this vulnerability?
medium- A.Implement a web application firewall (WAF) rule to block suspicious SQL keywords in search parameters.
- B.Sanitize user input by escaping single quotes and other special characters before concatenation.
- ✓ C.Replace dynamic SQL queries with parameterized prepared statements.
- D.Encode all user input using HTML entity encoding before database operations.
Why C: Option C is correct because parameterized prepared statements separate SQL logic from user input, ensuring that input is always treated as data, not executable code. This permanently prevents SQL injection by design, regardless of the input content, unlike input filtering or WAF rules which can be bypassed.
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Last reviewed: Jun 11, 2026
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