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Free Blockchain CBSA Practice Exam with Questions & Answers

Questions 1

Which of the following would NOT be true about what a smart contract gives your organization?

Options:
A.

Accuracy

B.

Savings

C.

Autonomy

D.

Trust

E.

Legal Assurance

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Questions 2

In regards to understanding the Ethereum Virtual Machine what statement is true?

Options:
A.

The EVM is extremely powerful, non-turing complete and perfect for doing computational intensive thins, because of the direct access to the graphics card.

B.

The EVM is extremely powerful, turing complete and perfect for doing computational intensive things, because of the direct access to the graphics card.

C.

While the EVM is Sandboxed, it isn’t as powerful as the Bitcoin network, because it’s not Turing Complete

D.

The EVM can’t access hardware layers or anything outside a blockchain node because it’s sandboxed.

Questions 3

Contracts live on the blockchain in an Ethereum-specific binary format called _____________?

Options:
A.

EOS

B.

EVM Code

C.

Ether

D.

Gas

E.

EVM Bytecode

Questions 4

What are two reasons that you would consider implementing a POW algo in your blockchain? (Select two.)

Options:
A.

PoW imposes no limits on actions in the network and therefore can thwart attacks better than other algos due to high cost

B.

What matters is to have large computational power to solve the puzzles and form new blocks over having a financial stake.

C.

PoW imposes some limits on actions in the network and therefore can thwart attacks better than other algos due to high cost

D.

The algo is energy efficient compared to POS and BFT

E.

The algo is energy efficient compared to POS and DPOS

Questions 5

You would like to run Ethereum DApps in a browser without a node. (No need to download blockchain.)

What could you use locally in your Chrome browser?

Options:
A.

Jaxx

B.

Solidity

C.

Metamask

D.

Mist

Questions 6

The difference between a decentralized and a distributed system is?

Options:
A.

A decentralized system is hosted across multiple datacenters

B.

Distributed and decentralized are the same thing

C.

A decentralized system is not wholly owned by a single entity

D.

A distributed system is not wholly owned by a single entity

Questions 7

Byzantine Fault Tolerance can be achieved only through a Proof of Work.

Options:
A.

FALSE

B.

TRUE

Questions 8

What is provided by the Hyperledger Fabric to facilitate network communications?

Options:
A.

API

B.

SDK

C.

Ruby

D.

Middleware

Questions 9

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

Options:
A.

256

B.

128

C.

32

D.

20

Questions 10

How many peers in the network need to endorse a transaction in a Hyperledger Fabric blockchain?

Options:
A.

The number of peers required to endorse a transaction is driven by the IAM policy that is specified by the ledger.

B.

The number of peers required to endorse a transaction is driven by the endorsement policy that is specified by the DApps.

C.

The number of peers required to endorse a transaction is driven by the endorsement policy that is specified by the ledger.

D.

The number of peers required to endorse a transaction is driven by the endorsement policy that is specified at chaincode deployment time.

Exam Code: CBSA
Certification Provider: Blockchain
Exam Name: BTA Certified Blockchain Solution Architect
Last Update: Sep 13, 2025
Questions: 229

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