Question 6 of 45

An encryption algorithm transforms plain text into cipher text using a key?

    Correct Answer: A

    An encryption algorithm is designed to transform plain text into cipher text using a key. This process ensures that the original information is encoded in such a way that it can only be decoded and understood by someone who has the appropriate decryption key.

Question 7 of 45

______ is the official Ethereum IDE that allows developers to build and deploy contracts and decentralized applications on top of the Ethereum blockchain.

    Correct Answer: B

    Mix is the official Ethereum IDE that allows developers to build and deploy contracts and decentralized applications on top of the Ethereum blockchain.

Question 8 of 45

Ethereum is a programmable blockchain. What is one of the following reasons is NOT correct regarding Ethereum programmability?

    Correct Answer: C

    Ethereum is known for its programmability, which includes allowing users to create their own operations of any complexity through the Ethereum Virtual Machine (EVM). Therefore, the statement 'does not allow users to create their own operations of any complexity' is incorrect, as it contradicts one of the fundamental features of Ethereum's programmability.

Question 9 of 45

Every node needs to keep track of time AND it needs to be in synch with its other peer nodes on the blockchain. In Bitcoin for example the current median for time is around?

    Correct Answer: A

    In Bitcoin, the median time older by more than 70 minutes from the system time causes a node to be out of synch with the network, but the median time for transactions to be confirmed is around 7 minutes, aligning with the average block generation time of 10 minutes.

Question 10 of 45

Addresses on a blockchain are derived by a process of hashing _________.

    Correct Answer: E

    Addresses on a blockchain are derived by a process of hashing public keys. This process involves using the private key to generate a public key, which is then hashed to produce the blockchain address. This ensures the security and integrity of the address, as the public key is visible but the private key remains confidential.