You currently using the Metamask Chrome plugin and you see a selection for Etherescan in the plugin. What is Etherscan used for?

A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum Blockchain

A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Bitcoin Blockchain

A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on the Ethereum and Tokens Blockchain

A search engine that allows users to easily lookup, confirm and validate transaction that have taken place on any Blockchain

What are two challenges with using a Proof of Work algorithm? (Select two.)

Difficulty rate goes done every year.

What is a logic gate in electronics and computer science?

A logic gate usually takes in 2 inputs and gives out 1 output. The inputs and outputs are binary values, meaning they can be 1 or 0.

A logic gate usually takes in 2 inputs and gives out 1 output. The inputs and outputs are binary values, meaning they can be both 1 and 0.

A logic gate usually takes in 3 inputs and gives out 2 output. The inputs and outputs are binary values, meaning they can be 1 or 0.

A logic gate usually takes in 2 inputs and gives out 6 output. The inputs and outputs are binary values, meaning they can be both 1 and 0.

A logic gate usually takes in 2 inputs and gives out 1 output. The inputs and outputs are binary values, meaning they can be 1 or 0.

Your company working for is now considering the blockchain. They would like to perform a POC with R3 Corda. The CIO was reading about different blockchain consensus algos and would like to understand what type of consensus algos is used with Corda.What is the best answer?

R3 Corda is a pluggable blockchain and allows the enterprise flexibility

R3 Corda is a byzantine fault tolerant blokchain

R3 Corda is a proof of stake based blockchain

R3 Corda is a proof of work based blockchain

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.

NSA is spying on us so what's it matters.

What are some advantages of Proof of Stake(POS) mining over Proof of Work(POW) mining? (Select three.)

Energy efficient in regards to that it could consume for electricity as compared to PoW

No need for expensive compared to POW

Faster validations compared to POW

Energy efficient in regards to that it could consume for electricity as compared to PoW

No need for expensive compared to POW

Faster validations compared to POW

Better blockchain security compared to POW

R3 Corda does not organize time into blocks. What does Corda actually perform and use?

Notary services and timestamping

Ripple is implemented as the blockchain and XRP for cryptocurrency.

Notary services and timesmapping

R3 Corda is a blockchain and does use blocks

Notary services and timestamping

The most popular Ethereum development framework is currently Truffle.What are three features of Truffle? (Select three.)

Scriptable deployment & migrations framework.

Automated contract testing with Mocha and Chai.

Built-in smart contract compilation, linking, deployment and binary management.

Scriptable deployment & migrations framework.

Automated contract testing with Mocha and Chai.

Takes Dapp transactions via Ws-rpc, json-rpc, ipc-rpc.

Built-in smart contract compilation, linking, deployment and binary management.

Automated contract testing with Mocha only

When you considering cryptography for a blockchain what would be types of symmetric cryptography you could consider? (Select two.)

Rivest-Shamir-Adleman algorithm aka the RSA.

Blockchain CBSA Practice Test 1 - Free Online Exam Prep & Questions

SHA-1 is the most commonly used SHA algorithm, and produces a ______-byte hash value(size).

256

128

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