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質問 1：
A Struct is a great way:
A. to implement pointers to other contracts that can hold new datatypes.
B. to define a new datatype in Solidity, so you don't need to use objects of another contract.
C. to hold instances of other contracts.
正解：B
質問 2：
All low-level functions on the address, so address.send(), address.call.valueQQ, address.callcode and address.delegatecall:
A. are interrupting execution on error, because they throw an exception.
B. returning Booleans to indicate an error during execution.
C. .send() throws an exception, while the other functions are returning Booleans during execution to indicate an error.
D. continuing execution on error silently, which is the reason why they are so dangerous.
正解：B
質問 3：
EVM assembly:
A. is another language similar to LLL, more secure than Solidity.
B. is much better than Solidity and a viable alternative.
C. can be split across multiple files, but every contract must be in a file with the same name as the contract itself.
正解：C
質問 4：
To avoid issues during Ethereum platform upgrades:
A. it's good to have the ability to pause a contract in order to manage the money at risk.
B. it's good to inform users about the updates via a newsletter.
C. Ethereum doesn't upgrade the platform. It's fixed and final.
正解：A
質問 5：
Consensus is reached:
A. by every single node in the blockchain network executing the same transaction.
B. by the miner nodes which make sure that a transaction is valid.
C. by a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.
正解：A
質問 6：
It's possible to access the blockchain via an Ethereum Node:
A. only via JavaScript because there is the proprietary Web3.js library.
B. by any programming language, as long as it adheres to the JSON-RPC standard.
正解：B
質問 7：
The nonce-field in a transaction is used:
A. to have an additional checksum for transactions.
B. to sum up all ethers sent from that address.
C. to protect against replay attacks.
正解：C
質問 8：
Which statement is true about the EVM?
A. The EVM is extremely powerful, turing complete and perfect for doing computational intensive things, because of the direct access to the graphics card.
B. While the EVM is Sandboxed, it isn't as powerful as the Bitcoin Network, because it's not Turing Complete.
C. The EVM can't access hardware layers or anything outside a blockchain node because it's sandboxed.
正解：A
A Struct is a great way:
A. to implement pointers to other contracts that can hold new datatypes.
B. to define a new datatype in Solidity, so you don't need to use objects of another contract.
C. to hold instances of other contracts.
正解：B
質問 2：
All low-level functions on the address, so address.send(), address.call.valueQQ, address.callcode and address.delegatecall:
A. are interrupting execution on error, because they throw an exception.
B. returning Booleans to indicate an error during execution.
C. .send() throws an exception, while the other functions are returning Booleans during execution to indicate an error.
D. continuing execution on error silently, which is the reason why they are so dangerous.
正解：B
質問 3：
EVM assembly:
A. is another language similar to LLL, more secure than Solidity.
B. is much better than Solidity and a viable alternative.
C. can be split across multiple files, but every contract must be in a file with the same name as the contract itself.
正解：C
質問 4：
To avoid issues during Ethereum platform upgrades:
A. it's good to have the ability to pause a contract in order to manage the money at risk.
B. it's good to inform users about the updates via a newsletter.
C. Ethereum doesn't upgrade the platform. It's fixed and final.
正解：A
質問 5：
Consensus is reached:
A. by every single node in the blockchain network executing the same transaction.
B. by the miner nodes which make sure that a transaction is valid.
C. by a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.
正解：A
質問 6：
It's possible to access the blockchain via an Ethereum Node:
A. only via JavaScript because there is the proprietary Web3.js library.
B. by any programming language, as long as it adheres to the JSON-RPC standard.
正解：B
質問 7：
The nonce-field in a transaction is used:
A. to have an additional checksum for transactions.
B. to sum up all ethers sent from that address.
C. to protect against replay attacks.
正解：C
質問 8：
Which statement is true about the EVM?
A. The EVM is extremely powerful, turing complete and perfect for doing computational intensive things, because of the direct access to the graphics card.
B. While the EVM is Sandboxed, it isn't as powerful as the Bitcoin Network, because it's not Turing Complete.
C. The EVM can't access hardware layers or anything outside a blockchain node because it's sandboxed.
正解：A
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