Public vs private blockchains - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a public blockchain property.

Blockchain / Solidity

blockchain_type = '[1]'

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

Aprivate

Bcentralized

Cpublic

Dpermissioned

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'private' or 'permissioned' which restrict access.

The code sets the blockchain type to 'public', which means anyone can join and participate.

2fill in blank

medium

Complete the code to check if a blockchain is private.

Blockchain / Solidity

if blockchain_type == '[1]':
    access = 'restricted'

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

Aprivate

Bpublic

Copen

Ddecentralized

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'public' which means open access.

The condition checks if the blockchain is 'private', which means access is restricted.

3fill in blank

hard

Fix the error in the code to correctly identify a public blockchain.

Blockchain / Solidity

def is_public(chain):
    return chain == '[1]'

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

Aprivate

Bclosed

Cpermissioned

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Checking for 'private' or 'permissioned' which are restricted.

The function returns True if the chain is 'public', meaning open to all.

4fill in blank

hard

Fill both blanks to create a dictionary showing blockchain types and their access.

Blockchain / Solidity

blockchain_access = {
    'public': '[1]',
    'private': '[2]'
}

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

Aopen

Brestricted

Cclosed

Dpermissioned

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up 'open' and 'restricted' values.

Public blockchains have 'open' access, private blockchains have 'restricted' access.

5fill in blank

hard

Fill all three blanks to complete the function that returns blockchain access type.

Blockchain / Solidity

def get_access_type(blockchain):
    if blockchain == '[1]':
        return '[2]'
    else:
        return '[3]'

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

Apublic

Bopen

Crestricted

Dprivate

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping access types or blockchain names.

The function returns 'open' for public blockchains and 'restricted' for others (private).