CISSP Software Development Security Practice Question
This CISSP practice question tests your understanding of software development 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.
Which TWO of the following are mandatory secure coding practices to prevent injection attacks? (Select exactly two.)
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
Options A and D are correct. Input validation ensures data conforms to expected patterns; parameterized queries separate code from data. Option B is wrong because encoding outputs is for XSS, not injection. Option C is wrong because error messages should not reveal internal details. Option E is wrong because encryption does not prevent injection.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Encode output to the browser
Why it's wrong here
This prevents XSS, not injection attacks.
✗
Encrypt sensitive input data
Why it's wrong here
Encryption does not mitigate injection vulnerabilities.
✗
Use custom error messages that detail the failure
Why it's wrong here
Detailed errors can aid attackers.
✓
Use parameterized queries or prepared statements
Why this is correct
Separates SQL logic from data, preventing injection.
Related concept
Static NAT maps one inside address to one outside address.
✓
Validate and sanitize all user input
Why this is correct
Prevents malformed input from entering queries.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CISSP question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CISSP NAT questions on configuration and troubleshooting.
Software Development Security — This question tests Software Development Security — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Use parameterized queries or prepared statements — Options A and D are correct. Input validation ensures data conforms to expected patterns; parameterized queries separate code from data. Option B is wrong because encoding outputs is for XSS, not injection. Option C is wrong because error messages should not reveal internal details. Option E is wrong because encryption does not prevent injection.
What should I do if I get this CISSP question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CISSP NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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