Which of the following would NOT be true about what a smart contract gives your organization?
In Hashcash, miners all compete to look for a so called. "____________"which, if provided as input (together with other parts of a block header) to a hash function, yields an output that’s numerically small enough to claim the next block reward.
By default, who can see transaction details on a public/open blockchain?
Which of the following hashing algos is considered to be the strongest?
Ethereum smart contracts can be written in what programming languages? Select all that apply.
In the Proof of Stake(POS) algorithm the miners are really known as ___________?
Secure Hash Algorithm (SHA-256) output is always 256 bits or 32 bytes in length regardless of the length of the input (even if input is millions of bytes). Select best answer.
Gas has multiple associated terms with it: Gas Prices, Gas Cost, Gas Limit, and Gas Fees. The principle behind Gas is to have a stable value for how much a transaction or computation costs on the Ethereum network.
Which is considered to be the static value for how much a computation costs in terms of Gas?
What blockchain is considered Blockchain 1.0, the first blockchain?
What are two cryptocurrencies that you would expect to see mining equipment with ASICS? (Select two.)
Which is the right order for Ethereum Denominations?
How does a client app communicate with Hyperledger fabric chaincode (Smart Contracts)?
In its simplest form, user identity on a blockchain can be unique and secure:
Which of the following blockchain is NOT a permissioned blockchain?
In common blockchain design, identity and transaction approval is possible through:
In blockchains there is the concept of "Group Consensus" and how many members must agree.
To prevent duplicate addresses/accounts from being generated on the same blockchain network, the input of the hash function that generates the address:
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?
The most popular Ethereum development framework is currently Truffle.
What are three features of Truffle? (Select three.)
In Hyperledger Fabric chaincode runs in a secured Docker container isolated from the endorsing peer process?
What does the acronym DAO represent?
By design, permissioned blockchains such as Hyperledger Fabric are not capable of creating or utilizing cryptocurrency.
Your customer is an enterprise that is focused on financial sectors.
What type of blockchain would this customer likely want specified for their enterprise?
Which of the following is true concerning Hyperledger Composer?
Ethereum is considered to be a ______________type of blockchain.
Which of following scenarios and datasets would be best suited to be utilized by a blockchain solution?
On the Ethereum blockchain the “nonce” of a transaction:
Is it possible to access the blockchain via an Ethereum Node?
Blockchains are decentralized ledgers which, by definition, are not controlled by a central authority. Due to the value stored in these ledgers, bad actors have huge economic incentives to try and cause faults.
What algo was the original solution to the potential problem as specified by Satoshi?
You would like to start your Gethin Fast Sync Mode.
What is the command for this?
In Hyperledger Fabric, the smart contract logic is also called by two other names _______________ and ______________? (Select two.)
Which of these desired outcomes is best obtained through a Blockchain solution?
Addresses on a blockchain are derived by a process of hashing _________.
When a blockchain software is updated with new functionality that breaks or modifies the rules of the previous version of the software, what has just occurred?