The correct answer is that only the CreditCard column supports equality searches. This is because deterministic encryption always produces the same ciphertext for a given plaintext, enabling exact-match comparisons like WHERE CreditCard = 'value', while randomized encryption generates different ciphertext each time, preventing any query operations on the encrypted data. On the AZ-500 exam, this concept tests your understanding of how Always Encrypted balances security and functionality—deterministic encryption sacrifices some randomness to allow equality lookups, whereas randomized encryption prioritizes stronger protection but blocks all searches. A common trap is assuming both column types support point lookups; remember that only deterministic encryption enables equality searches. Memory tip: “Deterministic = Determined match; Randomized = Random results, no match.”
AZ-500 Secure compute, storage, and databases Practice Question
This AZ-500 practice question tests your understanding of secure compute, storage, and databases. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Network Topology
Refer to the exhibit. You are analyzing the Always Encrypted configuration for an Azure SQL Database. The SSN column uses randomized encryption, and the CreditCard column uses deterministic encryption. Which statement is true regarding querying these columns?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "always"
Why it matters: Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Only the CreditCard column supports equality searches.
Option B is correct. Deterministic encryption allows equality comparisons (e.g., WHERE CreditCard = 'value') because it always generates the same ciphertext for a given plaintext. Randomized encryption does not allow any operations on encrypted data. Option A is wrong because randomized encryption does not allow equality checks. Option C is wrong because deterministic encryption does not allow pattern matching. Option D is wrong because both columns support point lookups via equality; randomized does not.
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.
✗
Both columns support equality searches.
Why it's wrong here
Randomized encryption does not support equality searches.
✓
Only the CreditCard column supports equality searches.
The clue word "always" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Both columns support pattern matching with LIKE.
Why it's wrong here
Neither encryption type supports pattern matching.
✗
Only the SSN column supports point lookups.
Why it's wrong here
SSN uses randomized; does not support point lookups.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-500 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 AZ-500 NAT questions on configuration and troubleshooting.
Secure compute, storage, and databases — This question tests Secure compute, storage, and databases — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Only the CreditCard column supports equality searches. — Option B is correct. Deterministic encryption allows equality comparisons (e.g., WHERE CreditCard = 'value') because it always generates the same ciphertext for a given plaintext. Randomized encryption does not allow any operations on encrypted data. Option A is wrong because randomized encryption does not allow equality checks. Option C is wrong because deterministic encryption does not allow pattern matching. Option D is wrong because both columns support point lookups via equality; randomized does not.
What should I do if I get this AZ-500 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 AZ-500 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "always". Absolute qualifier. An answer using 'always' is only correct if there are genuinely no exceptions — absolute statements are often wrong in networking.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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