Idempotency of methods in Rest API - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the HTTP method that is idempotent.

Rest API

method = "[1]"  # This method should be idempotent

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

APOST

BCONNECT

CPUT

DTRACE

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing POST because it sends data, but POST is not idempotent.

Confusing CONNECT or TRACE as idempotent methods.

The PUT method is idempotent because calling it multiple times with the same data results in the same state.

2fill in blank

medium

Complete the code to specify the HTTP method that is NOT idempotent.

Rest API

method = "[1]"  # This method is generally NOT idempotent

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

AHEAD

BGET

CDELETE

DPOST

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing DELETE thinking it is not idempotent, but DELETE is idempotent.

Confusing GET as non-idempotent, but GET is idempotent.

The POST method is not idempotent because multiple identical requests can create multiple resources or have other side effects.

3fill in blank

hard

Fix the error in the code to correctly check if a method is idempotent.

Rest API

def is_idempotent(method):
    return method in [1]

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

A["POST", "PATCH"]

B["GET", "PUT", "DELETE", "HEAD", "OPTIONS", "TRACE"]

C["CONNECT", "POST"]

D["POST", "PUT"]

Attempts:

3 left

💡 Hint

Common Mistakes

Including POST or PATCH in the idempotent list.

Missing some idempotent methods like DELETE or HEAD.

The list in option D contains all standard HTTP methods that are idempotent.

4fill in blank

hard

Fill both blanks to create a dictionary mapping HTTP methods to their idempotency status.

Rest API

idempotency = {
    "GET": [1],
    "POST": [2]
}

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

ATrue

BFalse

C"Yes"

D"No"

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings like "Yes" or "No" instead of boolean values.

Marking POST as idempotent.

GET is idempotent (True) and POST is not (False).

5fill in blank

hard

Fill all three blanks to complete the function that returns if a method is idempotent or not.

Rest API

def check_idempotency(method):
    idempotent_methods = [1]
    if method [2] idempotent_methods:
        return [3]
    else:
        return False

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

A["GET", "PUT", "DELETE", "HEAD", "OPTIONS", "TRACE"]

Bin

CTrue

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of 'in' for membership check.

Returning strings instead of boolean True.

The function checks if the method is in the list of idempotent methods and returns True if so.