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CBSA Practice Exam Questions and Answers

BTA Certified Blockchain Solution Architect

Last Update 2 days ago
Total Questions : 229

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Question # 1

Ethereum has a metric system of denominations used as units of ether.

What is the smallest denomination of Ether?

Options:

A.  

Kwei

B.  

Shannon

C.  

Wei

D.  

Finney

Discussion 0
Question # 2

In Hyperledger there are three distinct types of nodes.

What are the three types of nodes? (Select three.)

1. Client Node: That initiates the transaction

2. Peer Nodes: Commits Transaction & keeps the data in sync across the ledger

3. Ordered: They are the communication backbones and responsible for the distribution of

the transactions.

Options:

A.  

Client Node

B.  

Ordered Node

C.  

Certificate Node

D.  

Anchor

E.  

Peer Node

Discussion 0
Question # 3

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.

Options:

A.  

Difficulty bits

B.  

Nonce

C.  

Merkle Root

D.  

Timestamp

Discussion 0
Question # 4

Which of these technical components best represents why cryptocurrency is able to operate successfully?

Options:

A.  

An immutable digital ledger that is validated and distributed across many peers

B.  

Using API calls, cryptocurrency having a direct correlation to USD exchange rates

C.  

High performance computing power allows cryptocurrency to be minted just as a central government might do with fiat currency

D.  

Blockchain cryptocurrency transactions are always public which generates user trust and adoption

Discussion 0
Question # 5

In Ethereum the difficulty adjustment algorithm is coded in the ___________ file.

Options:

A.  

calcDifficultyFrontier

B.  

block_validator.go

C.  

calcDifficultyHomestead

D.  

calcDifficultyvalidator.go

Discussion 0
Question # 6

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.

Options:

A.  

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

B.  

Depends on input

C.  

False

D.  

True

Discussion 0
Question # 7

What type of attack would be considered a very large flaw in public blockchains such as Bitcoin’s Blockchain where the majority of hashpower could possibly be controlled thru an attack?

What is the specific attack Bitcoin could be exposed to?

Options:

A.  

51% Attacks

B.  

Tether Token Hack

C.  

DDoS Attack

D.  

BIP attack

E.  

Parity Wallet Attack

Discussion 0
Question # 8

The most popular Ethereum development framework is currently Truffle.

What are three features of Truffle? (Select three.)

Options:

A.  

Scriptable deployment & migrations framework.

B.  

Automated contract testing with Mocha and Chai.

C.  

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

D.  

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

E.  

Automated contract testing with Mocha only

Discussion 0
Question # 9

Which of the following blockchain is NOT a permissioned blockchain?

Options:

A.  

Quantum

B.  

Ethereum

C.  

R3 Corda

D.  

Ripple

E.  

Hyperledger

Discussion 0
Question # 10

In Ethereum a block contains two very important parameters. (Select two.)

Options:

A.  

Difficulty

B.  

Release date

C.  

Block number

D.  

Timestamp

Discussion 0
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