Parsing API responses in No-Code - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding JSON structure in API responses

When you receive a JSON response from an API, what does the structure usually represent?

A A set of instructions for the computer to execute

B A list of programming errors

C A collection of data organized in key-value pairs or arrays

D A visual layout for a webpage

💡 Hint

Think about how data is stored and shared in a simple, readable format.

API responses in JSON format usually contain data organized as keys and values or lists, making it easy to access specific information.

🚀 Application

intermediate

Extracting specific data from an API response

You receive this JSON response from an API:
{"user": {"name": "Alice", "age": 30, "city": "New York"}}

Which piece of information would you access to get the user's city?

A user.name

B user.city

C user.age

D user.country

💡 Hint

Look for the key that matches the information you want.

The key "city" inside the "user" object holds the city name, so accessing user.city gives "New York".

🔍 Analysis

advanced

Identifying errors in API response parsing

You try to parse this JSON response:
{"status": "success", "data": [1, 2, 3]}

Which mistake would cause an error when trying to access the first item in the data list?

A Trying to access data[0] when data is a string

B Trying to access data[0] when data is a list

C Trying to access data[1] when data has three items

D Trying to access data.length instead of data.length()

💡 Hint

Consider the data type of the 'data' field before accessing it.

If 'data' is a string, trying to access it like a list with data[0] will cause an error. But here, 'data' is a list, so accessing data[0] is valid.

❓ Comparison

advanced

Comparing API response formats

Which of the following is a key difference between XML and JSON API responses?

A JSON is generally lighter and easier to parse than XML

B XML is human-readable but JSON is not

C JSON uses tags while XML uses key-value pairs

D XML cannot represent nested data but JSON can

💡 Hint

Think about the size and complexity of these formats.

JSON is usually lighter and easier to parse because it uses a simpler syntax compared to XML's tag-based structure.

❓ Reasoning

expert

Determining the number of items in a parsed API response

An API returns this JSON response:
{"results": [{"id": 1}, {"id": 2}, {"id": 3}, {"id": 4}]}

After parsing, how many items are in the 'results' list?

A 3

B 0

C 1

D 4

💡 Hint

Count the number of objects inside the 'results' array.

The 'results' key holds a list with 4 objects, so the count is 4.