SSCP Systems and Application Security Practice Question
This SSCP practice question tests your understanding of systems and application security. 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.
A database administrator notices unusual queries that seem to be trying to extract data via SQL injection. The application uses parameterized queries for most queries, but some dynamic queries are built using string concatenation. What is the BEST remediation?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Rewrite all dynamic queries to use parameterized queries
Option A is correct because converting all dynamic queries to use parameterized queries eliminates the possibility of SQL injection. Option B is wrong because input validation alone is insufficient if concatenation is used. Option C is wrong because WAF is a detection/blocking control but not a code-level fix. Option D is wrong because least privilege reduces impact but does not prevent injection.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Restrict database user permissions to only necessary tables
Why it's wrong here
Least privilege limits damage but does not prevent injection.
✗
Implement strict input validation for all user inputs
Why it's wrong here
Input validation can reduce risk but can be bypassed; parameterization is the definitive fix.
✗
Deploy a web application firewall (WAF) in front of the application
Why it's wrong here
WAF is a compensating control, not a code fix.
✓
Rewrite all dynamic queries to use parameterized queries
Why this is correct
Parameterized queries prevent interpretation of user input as SQL code.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Authentication checks who the user is.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SSCP questions on access control and AAA configuration.
Systems and Application Security — This question tests Systems and Application Security — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Rewrite all dynamic queries to use parameterized queries — Option A is correct because converting all dynamic queries to use parameterized queries eliminates the possibility of SQL injection. Option B is wrong because input validation alone is insufficient if concatenation is used. Option C is wrong because WAF is a detection/blocking control but not a code-level fix. Option D is wrong because least privilege reduces impact but does not prevent injection.
What should I do if I get this SSCP question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related SSCP questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Authentication checks who the user is.
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Question Discussion
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