BTA Certified Blockchain Solution Architect

Question 1

When you are developing with Fabric Composer which of the following is true?

A. Simplifies the development of applications

B. Simplifies the integration of client applications

C. Increases the time of development

D. Decreases the time of development

Correct Answer: D

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Question 2

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?

A. 7 minutes

B. 70 Minutes

C. 7 seconds

D. 70 Seconds

E. 17 seconds

Correct Answer: B

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Question 3

The ____________of the tree is the topmost node and hence this tree is represented upside down. The bottommost nodes are called as ________nodes. Each node is simply a cryptographic hash of a transaction.

In the above diagram, Transaction A,B, C,C from the leaves of the tree. Select one.

A. Leaf Nodes, Root

B. Root, Hash

C. Leaf nodes, Root

D. Root, Leaf Nodes

E. Has, Root nodes

Correct Answer: D

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Question 4

In Proof of Work group consensus, the "nonce" refers to?

A. None of the above

B. Random nonsense data inserted at the end of a block to fill it completely

C. The average Bitcoin price over the last 90 days

D. The random data to be combined with the block data which will produce a hash output matching the current difficulty level

Correct Answer: D

Question 5

To interact with a deployed Ethereum Smart Contract, a user or app must:

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

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

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

D. All of the above

Correct Answer: C

Question 6

Hyperledger Composer has following two main components?

A. Business Network Archive

B. Composer Playground

Correct Answer: A,B

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Question 7

Ideal bug reports link the bug being reported to a _______________

A. Regression Issue

B. Business Value

C. Business Target

D. Business Process

E. Progression Issue

Correct Answer: B

Question 8

By default, who can see transaction details on a public/open blockchain?

A. The network owner / administrator

B. The recipient of a transaction

C. The initiator

D. Everyone

Correct Answer: D

Question 9

Proof of Stake consensus is most often needed for and implemented by:

A. Permissioned blockchains

B. Blockchains that manage wealth and assets

C. Blockchain networks with low traffic

D. Public blockchains

Correct Answer: B

Question 10

Blockchain systems assume all parties are trusted by all other parties in the exchange or ecosystem.

A. TRUE

B. FALSE

Correct Answer: B

Question 11

Looking the graph below, what type of an attack is this likely?

A. Selfish Mining Attack

B. 51% Attack

C. Blacklisting

D. P+ Epsilon Attack

Correct Answer: D

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Question 12

Ethereum is considered to be a ______________type of blockchain.

A. Hybrid

B. Permissionless

C. Permission Based

D. Private

Correct Answer: B

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Question 13

Message Calls in the Ethereum EVM is limited to a depth of ______?

A. 128

B. 2048

C. 1024

D. 256

Correct Answer: C

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Question 14

In what year did a whitepaper that was published by "Satoshi Nakamoto" outlined a solution to the Byzantine Generals problem?

A. 2008

B. 2006

C. 2009

D. 2010

Correct Answer: A

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Question 15

Select the best statement for determining how consensus is reached.

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

B. By every single node in the blockchain network different transactions.

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

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

Correct Answer: A

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Blockchain BTA Certified Blockchain Solution Architect - CBSA Exam Practice Test

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