Ethereum vs Bitcoin differences in Blockchain / Solidity - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the main purpose of Bitcoin.

Blockchain / Solidity

purpose = "[1]"
print(purpose)

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

ASmart contracts

BFile storage

CDecentralized apps

DDigital currency

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing smart contracts as Bitcoin's main purpose.

Bitcoin is mainly designed as a digital currency for peer-to-peer payments.

2fill in blank

medium

Complete the code to print the main feature of Ethereum.

Blockchain / Solidity

feature = "[1]"
print(feature)

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

ASmart contracts

BLower fees

CFaster transactions

DPrivacy coins

Attempts:

3 left

💡 Hint

Common Mistakes

Thinking Ethereum's main feature is faster transactions.

Ethereum is known for enabling smart contracts and decentralized applications.

3fill in blank

hard

Fix the error in the code to show the consensus method used by Bitcoin.

Blockchain / Solidity

consensus = "[1]"
print(consensus)

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

AProof of Stake

BProof of Work

CByzantine Fault Tolerance

DDelegated Proof of Stake

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing Proof of Stake which Ethereum uses now.

Bitcoin uses Proof of Work to secure its network.

4fill in blank

hard

Fill both blanks to create a dictionary showing transaction speed and fees for Bitcoin.

Blockchain / Solidity

bitcoin_stats = {"speed": "[1]", "fees": "[2]"}
print(bitcoin_stats)

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

ASlow

BHigh

CFast

DLow

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing speed and fees values.

Bitcoin transactions are slower and fees tend to be higher compared to Ethereum.

5fill in blank

hard

Fill all three blanks to create a dictionary showing Ethereum's consensus, transaction speed, and fees.

Blockchain / Solidity

ethereum_stats = {"consensus": "[1]", "speed": "[2]", "fees": "[3]"}
print(ethereum_stats)

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

AProof of Work

BFast

CLow

DProof of Stake

Attempts:

3 left

💡 Hint

Common Mistakes

Using Proof of Work for Ethereum's consensus.

Ethereum now uses Proof of Stake, has faster transactions, and generally lower fees than Bitcoin.

Practice

1. Which of the following best describes the primary purpose of Bitcoin compared to Ethereum?

easy

A. Bitcoin is mainly digital cash, while Ethereum supports programmable contracts.

B. Bitcoin is used for smart contracts, Ethereum is only for money transfer.

C. Bitcoin and Ethereum have the same purpose and features.

D. Ethereum is only a digital currency, Bitcoin is a platform for apps.

Solution

1. Step 1: Understand Bitcoin's main use

   Bitcoin is designed primarily as digital money for simple transfers.

2. Step 2: Understand Ethereum's main use

   Ethereum allows programmable smart contracts and decentralized apps beyond just money.

3. Final Answer:

   Bitcoin is mainly digital cash, while Ethereum supports programmable contracts. -> Option A

4. Quick Check:

   Bitcoin = digital cash, Ethereum = programmable blockchain [OK]

Hint: Bitcoin = money; Ethereum = apps and contracts [OK]

Common Mistakes:

• Confusing Ethereum as only digital money
• Thinking Bitcoin supports smart contracts
• Believing both have identical features

2. Which syntax correctly describes Ethereum's smart contract language?

easy

A. Ethereum smart contracts are written in Python.

B. Ethereum smart contracts are written in Solidity.

C. Ethereum smart contracts use SQL queries.

D. Ethereum smart contracts are written in HTML.

Solution

1. Step 1: Identify Ethereum's contract language

   Ethereum smart contracts are mainly written in Solidity, a language designed for this purpose.

2. Step 2: Eliminate incorrect languages

   Python, SQL, and HTML are not used for Ethereum smart contracts.

3. Final Answer:

   Ethereum smart contracts are written in Solidity. -> Option B

4. Quick Check:

   Solidity = Ethereum contract language [OK]

Hint: Solidity is Ethereum's contract language [OK]

Common Mistakes:

• Confusing Solidity with Python
• Thinking SQL or HTML are contract languages
• Assuming Bitcoin uses Solidity

3. What will be the output of this code snippet describing Bitcoin and Ethereum usage?

bitcoin_use = 'money transfer'
ethereum_use = 'smart contracts'
print(f'Bitcoin is for {bitcoin_use}, Ethereum is for {ethereum_use}.')

medium

A. Bitcoin is for mining, Ethereum is for trading.

B. Bitcoin is for smart contracts, Ethereum is for money transfer.

C. Bitcoin is for money transfer, Ethereum is for smart contracts.

D. Bitcoin and Ethereum have no specific uses.

Solution

1. Step 1: Read variable assignments

   bitcoin_use is set to 'money transfer', ethereum_use is set to 'smart contracts'.

2. Step 2: Understand the print statement

   The print outputs the string with these variables inserted in the correct places.

3. Final Answer:

   Bitcoin is for money transfer, Ethereum is for smart contracts. -> Option C

4. Quick Check:

   Variables match output text [OK]

Hint: Match variables to output placeholders [OK]

Common Mistakes:

• Swapping bitcoin_use and ethereum_use values
• Misreading the print format
• Ignoring variable values

4. Find the error in this statement about Bitcoin and Ethereum:

"Bitcoin supports complex smart contracts, Ethereum only supports simple transactions."

medium

A. Bitcoin does not support complex smart contracts; Ethereum does.

B. Ethereum does not support any transactions.

C. The statement is correct as is.

D. Bitcoin and Ethereum both only support simple transactions.

Solution

1. Step 1: Analyze Bitcoin's capabilities

   Bitcoin mainly supports simple transactions, not complex smart contracts.

2. Step 2: Analyze Ethereum's capabilities

   Ethereum supports complex smart contracts and decentralized applications.

3. Final Answer:

   Bitcoin does not support complex smart contracts; Ethereum does. -> Option A

4. Quick Check:

   Bitcoin = simple transactions, Ethereum = complex contracts [OK]

Hint: Remember Bitcoin is simple money, Ethereum is programmable [OK]

Common Mistakes:

• Thinking Bitcoin supports complex contracts
• Believing Ethereum only does simple transfers
• Assuming both have same features

5. You want to build a decentralized app that automatically executes agreements when conditions are met. Which blockchain should you choose and why?

hard

A. Ethereum, because it only supports simple money transfers.

B. Bitcoin, because it has the fastest transaction speed for apps.

C. Bitcoin, because it supports complex programmable contracts.

D. Ethereum, because it supports programmable smart contracts for automation.

Solution

1. Step 1: Identify app requirements

   The app needs automatic execution of agreements, which means programmable logic is required.

2. Step 2: Match blockchain capabilities

   Ethereum supports programmable smart contracts enabling automation; Bitcoin does not.

3. Final Answer:

   Ethereum, because it supports programmable smart contracts for automation. -> Option D

4. Quick Check:

   Programmable contracts = Ethereum [OK]

Hint: Choose Ethereum for programmable apps [OK]

Common Mistakes:

• Choosing Bitcoin for smart contract apps
• Confusing transaction speed with programmability
• Ignoring Ethereum's contract features