Question 475 of 505

Software Development and Design →mediumMultiple SelectObjective-mapped

200-901 Software Development and Design Practice Question

This 200-901 practice question tests your understanding of software development and design. 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 developer is designing a REST API for managing network devices. Which three best practices should be followed for the API design? (Choose three.)

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.

Question 1mediummulti select

Full question →

A
Use POST for all state-changing operations to ensure idempotency.
Why wrong: C is incorrect because POST is not idempotent; repeated POST requests may create multiple resources. Idempotent methods like PUT or DELETE are more suitable for state changes.
B
Use nouns for resource names (e.g., /devices) rather than verbs.
D is correct because RESTful APIs use nouns to represent resources, while verbs are typically avoided in endpoint paths.
C
Include versioning in the URL path (e.g., /v1/devices).
B is correct because versioning in the URL path helps maintain backward compatibility and is widely adopted in REST APIs.
D
Always send the entire resource representation in all responses to reduce client requests.
Why wrong: E is incorrect because sending the full representation in every response wastes bandwidth; clients can use specific fields or pagination instead.
E
Use proper HTTP status codes to describe results.
A is correct because HTTP status codes provide standardised feedback on success/failure and are a fundamental REST best practice.

Full breakdown with real-world context →

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 nouns for resource names (e.g., /devices) rather than verbs.

A, B, and D are correct. A: Using proper HTTP status codes is a REST best practice for clear success/failure indication. B: Including versioning in the URL path ensures backward compatibility. D: Using nouns for resources (e.g., /devices) aligns with RESTful principles. C is incorrect because POST is not idempotent; PUT/DELETE are preferred for idempotent operations. E is incorrect because transmitting full representations unnecessarily increases bandwidth; partial responses or specific fields should be used.

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.

✗
Use POST for all state-changing operations to ensure idempotency.
Why it's wrong here
C is incorrect because POST is not idempotent; repeated POST requests may create multiple resources. Idempotent methods like PUT or DELETE are more suitable for state changes.
✓
Use nouns for resource names (e.g., /devices) rather than verbs.
Why this is correct
D is correct because RESTful APIs use nouns to represent resources, while verbs are typically avoided in endpoint paths.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✓
Include versioning in the URL path (e.g., /v1/devices).
Why this is correct
B is correct because versioning in the URL path helps maintain backward compatibility and is widely adopted in REST APIs.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
Always send the entire resource representation in all responses to reduce client requests.
Why it's wrong here
E is incorrect because sending the full representation in every response wastes bandwidth; clients can use specific fields or pagination instead.
✓
Use proper HTTP status codes to describe results.
Why this is correct
A is correct because HTTP status codes provide standardised feedback on success/failure and are a fundamental REST best practice.
Clue confirmation
The clue word "best" in the question point toward this answer.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.

What to study next

Got this wrong? Here's your next step.

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 200-901 NAT questions on configuration and troubleshooting.

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FAQ

Questions learners often ask

What does this 200-901 question test?

Software Development and Design — This question tests Software Development and Design — Static NAT maps one inside address to one outside address..

What is the correct answer to this question?

The correct answer is: Use nouns for resource names (e.g., /devices) rather than verbs. — A, B, and D are correct. A: Using proper HTTP status codes is a REST best practice for clear success/failure indication. B: Including versioning in the URL path ensures backward compatibility. D: Using nouns for resources (e.g., /devices) aligns with RESTful principles. C is incorrect because POST is not idempotent; PUT/DELETE are preferred for idempotent operations. E is incorrect because transmitting full representations unnecessarily increases bandwidth; partial responses or specific fields should be used.

What should I do if I get this 200-901 question wrong?

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?

Static NAT maps one inside address to one outside address.

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