Query parameters in Postman - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add a query parameter named 'user' with value '123' in Postman.

Postman

pm.request.url.addQueryParams({ user: [1] });

Drag options to blanks, or click blank then click option'

A'123'

B'user'

C'value'

D'param'

Attempts:

3 left

💡 Hint

Common Mistakes

Using the key instead of the value for the parameter.

Forgetting to put quotes around the value.

The value of the query parameter 'user' should be '123', so we put '123' as the value.

2fill in blank

medium

Complete the code to retrieve the value of the query parameter 'page' from the request URL in Postman.

Postman

const page = pm.request.url.query.get([1]);

Drag options to blanks, or click blank then click option'

A'page'

B'limit'

C'offset'

D'user'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong key name that does not exist in the query parameters.

Not using quotes around the key name.

To get the value of the 'page' query parameter, we pass 'page' as the key to the get() method.

3fill in blank

hard

Fix the error in the code to correctly add a query parameter in Postman.

Postman

pm.request.url.query.add({ key: 'sort', value: [1] });

Drag options to blanks, or click blank then click option'

Adesc

B'desc'

Csort

D'sort'

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the value without quotes causing a syntax error.

Using the key name as the value.

The value must be a string, so it needs to be in quotes: 'desc'.

4fill in blank

hard

Fill both blanks to create a query parameter object with key 'filter' and value 'active' in Postman.

Postman

const param = { key: [1], value: [2] };

Drag options to blanks, or click blank then click option'

A'filter'

B'active'

C'status'

D'inactive'

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping key and value.

Forgetting quotes around strings.

The key should be 'filter' and the value should be 'active' as strings.

5fill in blank

hard

Fill all three blanks to create a query parameter object with key 'category', value 'books', and add it to the request URL in Postman.

Postman

const param = { key: [1], value: [2] };
pm.request.url.query.add([3]);

Drag options to blanks, or click blank then click option'

A'category'

B'books'

Cparam

D'items'

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings instead of the param object when adding.

Missing quotes around key or value.

The key is 'category', the value is 'books', and the object param is added to the query parameters.

Practice

1. What symbol is used to start query parameters in a URL when making an API request in Postman?

easy

A. Question mark (?)

B. Ampersand (&)

C. Hash (#)

D. Slash (/)

Solution

1. Step 1: Understand URL structure

   Query parameters always start after the base URL with a question mark to separate them from the path.

2. Step 2: Identify the correct symbol

   The question mark (?) is the standard symbol to begin query parameters in URLs.

3. Final Answer:

   Question mark (?) -> Option A

4. Quick Check:

   Query parameters start with ? = C [OK]

Hint: Query parameters always start with ? in URLs [OK]

Common Mistakes:

• Using & to start query parameters instead of ?
• Confusing # (fragment) with query start
• Starting query parameters with /

2. Which of the following is the correct way to add two query parameters named user and id with values alice and 123 respectively in Postman?

easy

A. ?user=alice&id=123

B. &user=alice&id=123

C. ?user=alice#id=123

D. ?user=alice;id=123

Solution

1. Step 1: Start query parameters with ?

   The first query parameter must start with a question mark (?).

2. Step 2: Separate multiple parameters with &

   Additional parameters are separated by an ampersand (&), so user=alice&id=123 is correct.

3. Final Answer:

   ?user=alice&id=123 -> Option A

4. Quick Check:

   First ? then & between parameters = A [OK]

Hint: Start with ? then separate params with & [OK]

Common Mistakes:

• Starting with & instead of ?
• Using # instead of & to separate parameters
• Using semicolon ; instead of &

3. Given the URL https://api.example.com/data?type=fruit&color=red, what will Postman send as query parameters?

medium

A. No query parameters sent

B. type=fruit only

C. type=fruit and color=red

D. color=red only

Solution

1. Step 1: Identify all query parameters after ?

   After the question mark, parameters are separated by &. Here, we have type=fruit and color=red.

2. Step 2: Confirm both parameters are included

   Both parameters will be sent in the request as key-value pairs.

3. Final Answer:

   type=fruit and color=red -> Option C

4. Quick Check:

   Both params after ? separated by & = D [OK]

Hint: All params after ? separated by & are sent [OK]

Common Mistakes:

• Ignoring second parameter after &
• Thinking only first parameter is sent
• Confusing fragment (#) with query parameters

4. You wrote the URL https://api.example.com/search?query=books&limit10 in Postman. What is wrong with this query parameter syntax?

medium

A. Extra '&' before 'limit10'

B. Missing '=' between 'limit' and '10'

C. Query parameters should start with '&' not '?'

D. Using '=' instead of ':' between key and value

Solution

1. Step 1: Check each query parameter format

   Each parameter must be in key=value format. Here, 'limit10' lacks '='.

2. Step 2: Identify missing '=' sign

   Correct syntax should be 'limit=10' to assign value 10 to key 'limit'.

3. Final Answer:

   Missing '=' between 'limit' and '10' -> Option B

4. Quick Check:

   Each param must be key=value, '=' missing = B [OK]

Hint: Check each param has key=value format [OK]

Common Mistakes:

• Omitting '=' between key and value
• Starting query with & instead of ?
• Using ':' instead of '='

5. You want to filter API results in Postman to show only active users with role 'admin' and limit results to 5. Which query parameter string correctly achieves this?

hard

A. ?status=active&role=admin&limit=5&

B. ?status=active&role=admin&limit5

C. ?status=active;role=admin;limit=5

D. ?status=active&role=admin&limit=5

Solution

1. Step 1: Use correct key=value pairs separated by &

   Each filter must be a key=value pair, separated by &. ?status=active&role=admin&limit=5 uses correct syntax.

2. Step 2: Avoid syntax errors like missing '=' or wrong separators

   ?status=active&role=admin&limit5 misses '=' in limit, C uses semicolons instead of &, D has extra trailing & which is invalid.

3. Final Answer:

   ?status=active&role=admin&limit=5 -> Option D

4. Quick Check:

   All params key=value separated by & = A [OK]

Hint: Use key=value pairs separated by & without extra symbols [OK]

Common Mistakes:

• Missing '=' in parameters
• Using semicolons instead of &
• Adding extra & at the end