Ethereum vs Bitcoin differences in Blockchain / Solidity - Practice Questions

Challenge - 5 Problems

🧠 Conceptual

intermediate

Primary Purpose of Ethereum vs Bitcoin

What is the main difference in the primary purpose between Ethereum and Bitcoin?

A Bitcoin is mainly a digital currency, while Ethereum is a platform for decentralized applications.

B Ethereum is only used for digital currency, Bitcoin is for smart contracts.

C Both Ethereum and Bitcoin are only used for storing value with no other functions.

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

💡 Hint

Think about what you can build on Ethereum beyond just sending money.

Bitcoin was created as a digital currency to transfer value securely. Ethereum was designed as a platform to build decentralized applications using smart contracts.

❓ Predict Output

intermediate

Ethereum Smart Contract Gas Cost Calculation

Given this simplified Ethereum smart contract function call, what is the total gas cost if the base cost is 21000 and the function adds 15000 gas?

Blockchain / Solidity

base_gas = 21000
function_gas = 15000
total_gas = base_gas + function_gas
print(total_gas)

A 36000

B 21000

C 15000

D 19000

💡 Hint

Add the base gas and function gas costs.

The total gas cost is the sum of the base transaction cost (21000) plus the function execution cost (15000), which equals 36000.

❓ Predict Output

advanced

Bitcoin Transaction Fee Calculation

What is the transaction fee if a Bitcoin transaction size is 250 bytes and the fee rate is 50 satoshis per byte?

Blockchain / Solidity

tx_size_bytes = 250
fee_rate_sat_per_byte = 50
fee = tx_size_bytes * fee_rate_sat_per_byte
print(fee)

A 5000

B 50

C 12500

D 250

💡 Hint

Multiply the size by the fee rate.

The fee is calculated by multiplying the transaction size (250 bytes) by the fee rate (50 satoshis/byte), resulting in 12500 satoshis.

🧠 Conceptual

advanced

Consensus Mechanism Difference

Which consensus mechanism does Ethereum currently use compared to Bitcoin?

A Both use Proof of Work.

B Ethereum uses Proof of Work, Bitcoin uses Proof of Stake.

C Both use Proof of Stake.

D Ethereum uses Proof of Stake, Bitcoin uses Proof of Work.

💡 Hint

Ethereum recently changed its consensus method.

Ethereum transitioned to Proof of Stake to reduce energy consumption, while Bitcoin still uses Proof of Work.

🧠 Conceptual

expert

Smart Contract Language Difference

Which programming language is primarily used for writing Ethereum smart contracts, and what is Bitcoin's scripting language characteristic?

A Ethereum uses Python, Bitcoin uses Solidity.

B Ethereum uses Solidity, Bitcoin uses a non-Turing complete scripting language.

C Ethereum uses JavaScript, Bitcoin uses Python.

D Ethereum uses C++, Bitcoin uses Java.

💡 Hint

Ethereum smart contracts are written in a special language designed for it.

Ethereum smart contracts are mainly written in Solidity, a Turing-complete language. Bitcoin uses a simpler, non-Turing complete scripting language for security.