CBSA BTA Certified Blockchain Solution Architect Questions and Answers

A PRNG output guaranteed to be unique

A server/node timestamp added to a PRNG output

Creating a hash based on a cryptographic public key and various meta data

The most recent block height hash combined with a cryptographic private key

Gas Account

Contract Accounts

External Accounts

Internal Accounts

dApp Accounts

By the miner nodes which make sure that a transaction is valid.

By a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.

By every single node in the blockchain network different transactions.

By every single node in the blockchain network executing the same transaction.

RSA

SHA-2

AES

MD-5

SHA

Have a reference to the public address of the deployed Smart Contract

Have the appropriate permissions needed to invoke the functions of the Smart Contract

Have sufficient gas to perform read and write operations against the Smart Contract

All of the above

They provide added security over off-chain transaction code on other blockchain networks

Because they are compiled into bytecode they cannot be used in an unintended manner

Any flaw discovered in their code can quickly be updated and redeployed

They are Turing complete and deterministic in nature

TRUE

FALSE

They are much easier to maintain and update

They have significantly higher transaction speeds

Their distributed ledger systems are more secure and immutable

All of the above

By users utilizing public blockchains

User identity cannot yet be protected on blockchain systems

Through cryptographic hashing

By users utilizing permissioned blockchains

Bitcoin

Ethereum

Neo

Litecoin

Monero

Class

Variable

Method

Function

The initiator

Everyone

The recipient of a transaction

The network owner / administrator

Wallet Addresses

Private Keys

IP Addresses

Mac addresses

Public Keys

FALSE

TRUE

Sign/approve any transaction/action that might be made by the holder of the key pair

Verify the digital signature of a given key pair

Decrypt the private key so valid transactions/actions can be performed

Encrypt the private key

geth list accounts

geth account node list

geth account node

geth account list

.Net

Javascript

C++

Node.js

PHP

Cpp-ethereum

Geth

TestRPC

Parity

Go

Python

Node.js

Java

JS

Neo Generals’ problem

Byzantine Generals’ problem

Byzantine Admirals’ problem

Renaissance Generals’ problem

Authenticated Encryption

Proof of Work

PBKDF2

None of the above

Mist

Mix

Truffle

Metamask

Embark

Holds the gas amount to be paid to the miner writing the block that contains the transaction

Is used to ensure that transactions by a given account are written in sequential order

Is reset to zero after each successfully mined blocked

Must always start with four zeroes

FALSE

TRUE

Quantum

Ethereum

R3 Corda

Ripple

Hyperledger

Root, Hash

Root, Leaf Nodes

Has, Root nodes

Leaf nodes, Root

Leaf Nodes, Root

Wei

Tether

Gas

Ether

If they need a native currency for their chain network, they can develop their own native currency with chaincode.

Hyperledger Fabric can be integrated with any crypto currency by using the proper APIs.

If they need a native currency for their chain network, they must use Ripple currency with chaincode.

If they need a native currency for their chain network, they must use Ethereum currency with chaincode.

Hyperledger Fabric does not support cryptocurrencies.

Only through code executed in other Smart Contracts and XML-RPC

Through code executed in other Smart Contracts and through web3.js or any JSON-RPC library

Only through code executed in another Smart Contract

Smart Contracts cannot be externally invoked. They become autonomous at launch and cannot be called.

52%

74%

75%

51%

100%