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Blockchain Solution Architect
CBSA
BTA Certified Blockchain Solution Architect Questions and Answers

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Viewing page 5 out of 7 pages

Viewing questions 41-50 out of questions

Questions # 41:

Some of the various consensus models employed by public blockchain networks include:

Options:

Proof of Work

Proof of Importance

Proof of Stake

All of the above

Answer

Questions # 42:

A ____________cipher basically means it is using a fixed key which replaces the message with a pseudorandom string of characters. It is basically the encryption of each letter one at a time.

What is the cipher type?

Options:

Stream

Block

Parallel

RSA

Answer

Explanation

Stream cipher basically means using a fixed key which replaces the message with a pseudorandom string of characters. It is basically the encryption of each letter one at a time.

Questions # 43:

By design, permissioned blockchains such as Hyperledger Fabric are not capable of creating or utilizing cryptocurrency.

Options:

FALSE

TRUE

Answer

Questions # 44:

The difference between a decentralized and a distributed system is?

Options:

A decentralized system is hosted across multiple datacenters

Distributed and decentralized are the same thing

A decentralized system is not wholly owned by a single entity

A distributed system is not wholly owned by a single entity

Answer

Questions # 45:

Blockchain systems can offer what advantage over centralized systems?

Options:

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

Answer

Questions # 46:

Taking a series of unrelated transactions and writing them to a particular block is:

Options:

Highly insecure and considered bad practice

Most common in public blockchain

Most common in permissioned blockchains

Required among all blockchains

Answer

Questions # 47:

Is it possible to access the blockchain via an Ethereum Node?

Options:

Yes

Answer

Explanation

True You can interact with the blockchain using RPC via HTTP POST requests. You can find out more about the JSON-RPC API here. Although you can use RPC to communicate with a local node you can also use it to hook up with a remote node. To send requests to the local node we address them to http://127.0.0.1:8545 (Geth exposes the RPC service on port 8545).

Questions # 48:

How are "assets" in Hyperledger Fabric represented? (Select two.)

Options:

JSON

Node

YAML

Binary

Deployment Manager

Answer

A, D

Explanation

Assets in Hyperledger Fabric are represented in JSON or Binary. Assets are represented in Hyperledger Fabric as a collection of key-value pairs, with state changes recorded as transactions on a Channel ledger. Assets can be represented in binary and/or JSON form.

Questions # 49:

A private blockchain like Hyperledger would be the right choice for which scenario: