CBSA試験無料問題集（230題）「Blockchain BTA Certified Blockchain Solution Architect 認定」

出題：1

Blockchain provenance is defined as _______________?

A. Recording the history of data, from its inception to various stages of the data lifecycle.

B. Information sent to the blockchain and written to the blockchain.

C. Recording the history of data, from its last block to various stages of the data lifecycle

D. Once a transaction has been written and committed to the ledger it cannot be changed.

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：2

The word "Drapp" or "DApp" is most commonly understood to mean what?

A. Distributed Apps and Programs

B. Distributed Application

C. Distributed Autonomous Application

D. Decentralized Application

正解：D 解答を投票する

出題：3

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

A. The algo is energy efficient compared to POS and BFT

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

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

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

E. The algo is energy efficient compared to POS and DPOS

正解：B,D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：4

Select the two kinds of accounts in Ethereum which share the same address space. (Select two.)

正解：A,C 解答を投票する

出題：5

You are currently considering blockchain solutions for your organization. You read an article about
"blockless" blockchains.
What are the two benefits that could be gained over a traditional blockchain solution? (Select two.)

A. Greater Transaction Security

B. Faster Performance

C. Greater transaction Capacity

D. Faster Block writes

正解：A,D 解答を投票する

出題：6

Which of these desired outcomes is best obtained through a Blockchain solution?

A. A mobile app that displays information about today's weather

B. None of the above

C. A website that shows current data from various stock markets

D. Pending financial transactions need to be stored until completed and then should be deleted

正解：C 解答を投票する

出題：7

Which factor influences the gas cost to deploy a Smart Contact on the Ethereum blockchain?

A. The types of operations written in code within the Smart Contract

B. None. Smart Contract deployment has a fixed gas cost

C. The current Ethereum market conditions

D. The total size of the complied Smart Contract measured in kilobytes

正解：D 解答を投票する

出題：8

What are two advantages of using a DPOS algo in a blockchain? (Select two.)

正解：D,E 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：9

Hyperledger Composer has two main components.
What are the two components? (Select two.)

正解：E,F 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：10

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

正解：A,E 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：11

Every node needs to keep track of time AND it needs to be in synch with its other peer nodes on the blockchain. In Bitcoin for example the current median for time is around?

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：12

When a consensus algo is considered to be "pluggable modularity", what does that mean?

A. Select an optimal algorithm for your networks

B. Add permission as needed

C. Add user as needed

D. Select a specific API that manages the blockchain

正解：A 解答を投票する

出題：13

How many satoshis are in 1 bitcoin and how many wei in an Ether? (Select two.)

正解：C,E 解答を投票する

出題：14

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?

正解：A 解答を投票する

出題：15

Consider the following scenario: A solo app developer wants to create their own cryptocurrency and build a blockchain based that allows users to buy and sell second-hand items with that cryptocurrency from each other. Before the transaction is considered complete, the purchaser must put the funds in an escrow service and the sender must enter the courier tracking number into that same escrow. Time is of the essence and this developer doesn't want to worry about networking of infrastructure. This app must be fully autonomous or
"decentralized".
Which architecture would best solve the product need?

A. Hyperledger Fabric for the escrow service and token creation using chaincode; User-facing features built with Hyperledger Composer

B. Ethereum for token creation; Traditional multitier API and database for escrow service; User-facing features built in web technologies then minified unto a String and deployed to an Ethereum Smart Contract

C. The product cannot be built. Fully decentralized apps are not yet possible for user interface

D. Ethereum for token creation and escrow service; User-facing features built with web technologies and deployed through IPFS

正解：B 解答を投票する

出題：16

Which of the following is NOT a requirement of an enterprise blockchain typically?

A. Append-only distributed system of record shared across business network

B. Cost efficient blockchain

C. Transactions are endorsed by relevant participants

D. Ensuring appropriate visibility; transactions are secure, authenticated & verifiable

正解：B 解答を投票する

出題：17

Satoshi Nakamoto invented a way to achieve Decentralized Consensus?

A. FALSE

B. TRUE

正解：B 解答を投票する

出題：18

Ethereum tries to keep the mining time difference between ____ and _____seconds.

A. 10, 29

B. 10, 19

C. 10, 20

D. 10, 18

正解：B 解答を投票する

CBSA試験無料問題集「Blockchain BTA Certified Blockchain Solution Architect 認定」