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Blockchain CBSA Exam Questions
BTA Certified Blockchain Solution Architect (Page 8 )

Updated On: 24-Feb-2026
Page 8 of 47
PDF with 229 Questions

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.

  1. Root, Hash
  2. Root, Leaf Nodes
  3. Has, Root nodes
  4. Leaf nodes, Root
  5. Leaf Nodes, Root

Answer(s): B

Explanation:

The root of the tree is the topmost node and hence this tree is represented upside down. The bottommost nodes are called as leaf nodes. Each node is simply a cryptographic hash of a transaction. In the above diagram, Transaction A,B,C,C form the leaves of the tree.


Reference:

https://medium.com/all-things-ledger/bitcoins-implementation-of-blockchain-2be713f662c2



Which of the following blockchain is NOT a permissioned blockchain?

  1. Quantum
  2. Ethereum
  3. R3 Corda
  4. Ripple
  5. Hyperledger

Answer(s): B



What blockchain is considered Blockchain 1.0, the first blockchain?

  1. Bitcoin Cash
  2. Ethereum
  3. Litecoin
  4. Bitcoin
  5. NEO

Answer(s): D

Explanation:

Blockchain 1.0, Grandpa Bitcoin


Reference:

https://hackernoon.com/a-brief-history-in-the-evolution-of-blockchain-technology-platforms-1bb2bad8960a



In the EVM every account has a persistent key-value store mapping 256-bit words to 256-bit words called

  1. Gas
  2. Space
  3. Storage
  4. Datastore
  5. Database

Answer(s): C

Explanation:

Every account has a persistent key-value store mapping 256-bit words to 256-bit words called storage.


Reference:

https://solidity.readthedocs.io/en/latest/introduction-to-smart-contracts.html#the-ethereum-virtual-machine



____________ is the official Ethereum IDE that allows developers to build and deploy contracts and decentralized applications on top of the Ethereum blockchain.

  1. Mist
  2. Mix
  3. Truffle
  4. Metamask
  5. Embark

Answer(s): B

Explanation:

Mix is the official Ethereum IDE that allows developers to build and deploy contracts and decentralized applications on top of the Ethereum blockchain






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