This 200-901 practice question tests your understanding of network fundamentals. 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 THREE of the following are valid JSON data types? (Choose three.)
String
Strings are enclosed in double quotes.
Number
Numbers can be integer or floating point.
Function
Why wrong: Functions are not a JSON type.
Array
Arrays are ordered lists of values in JSON.
Date
Why wrong: Dates are represented as strings, not a distinct type.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
String
JSON (JavaScript Object Notation) is a lightweight data-interchange format that supports only a fixed set of data types as defined by RFC 7159. String is a valid JSON type because it must be enclosed in double quotes and can contain Unicode characters. Number is valid as it includes integers and floating-point values without quotes, following the numeric grammar in the JSON specification.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
String
Why this is correct
Strings are enclosed in double quotes.
Related concept
Read the scenario before looking for a memorised answer.
Number
Why this is correct
Numbers can be integer or floating point.
Related concept
Read the scenario before looking for a memorised answer.
Function
Why it's wrong here
Functions are not a JSON type.
Array
Why this is correct
Arrays are ordered lists of values in JSON.
Related concept
Read the scenario before looking for a memorised answer.
Date
Why it's wrong here
Dates are represented as strings, not a distinct type.
Common exam traps
Cisco often tests the misconception that JSON supports JavaScript-specific types like Function or Date, but JSON is a language-independent format with only six defined types per RFC 7159.
Detailed technical explanation
JSON's type system is intentionally minimal to ensure language interoperability, supporting only string, number, boolean, null, object, and array. A common subtlety is that JSON numbers have no distinction between integer and floating-point, and leading zeros are not allowed. In real-world APIs, dates are often serialized as strings in ISO 8601 format (e.g., '2025-03-20T10:30:00Z') to avoid ambiguity across time zones.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 200-901 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Network Fundamentals — study guide chapter
Learn the concepts, then practise the questions
Network Fundamentals practice questions
Targeted practice on this topic area only
All 200-901 questions
505 questions across all exam domains
Cisco DevNet Associate 200-901 study guide
Full concept coverage aligned to exam objectives
200-901 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise 200-901 questions linked to Software Development and Design.
Practise 200-901 questions linked to Understanding and Using APIs.
Practise 200-901 questions linked to Cisco Platforms and Development.
Practise 200-901 questions linked to Application Deployment and Security.
Practise 200-901 questions linked to Infrastructure and Automation.
Practise 200-901 questions linked to Network Fundamentals.
Practise 200-901 questions linked to 200-901 fundamentals.
Practise 200-901 questions linked to 200-901 scenario.
Practise 200-901 questions linked to 200-901 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Network Fundamentals — This question tests Network Fundamentals — Read the scenario before looking for a memorised answer..
The correct answer is: String — JSON (JavaScript Object Notation) is a lightweight data-interchange format that supports only a fixed set of data types as defined by RFC 7159. String is a valid JSON type because it must be enclosed in double quotes and can contain Unicode characters. Number is valid as it includes integers and floating-point values without quotes, following the numeric grammar in the JSON specification.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 24, 2026
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.