Blockchain 5

Digital Signature, Hash and Merkel Tree comes in which layer

• Application layer

• Infrastructure layer

• Data Layer

• Network Layer

Smart Contracts, Chain Codes and dApps comes in which layer

• Data Layer

• Application Layer

• Network Layer

• Consensus Layer

Ethereum, as of March 2024, uses a ............................. consensus mechanism.

Bitcoin uses the energy-intensive ............................................ consensus, which requires miners to compete for rewards.

• Proof-of-burns

  &

  Proof of stake

• proof-of-stake

  &

  proof-of-work

• proof-of-work

  &

  proof-of-stake

• proof-of-authority

  &

  Proof of Burns

Which of the following is Correct about consensus layer?

• Consensus protocols (algorithms) create an irrefutable set of agreements between nodes across the distributed P2P network.

• Consensus guarantees that a single chain is followed and that it holds the truth.

• Consensus keeps all the nodes synchronized

• Consensus is the rules that nodes follow to ensure that transactions are validated within the boundaries of those rules and that blocks follow those rules.

• All of the above

A ............................................ is a digital agreement on a blockchain network that is executed automatically upon fulfilling some terms and conditions.

• dAPPS

• Smart contract

• Ledger

• Geth

dApps in Blockchain is a .....................................................

• Distributed Applications

• Decentralized Application

• Dimensionless application

• Disturbed application

The .........................................................  is a form of double spending attack in which a dishonest client pre-mines a block containing a transaction paying the coins to an address under their control.

• Finney attack 

• Brute force attack

• one-confirmation attack

• Goldfinger attack

This attack  targets an exchange rather than a vendor

• Goldfinger attack

• vector 76 

• Finney attack

• All of the above

Cache Hit Ratio is a .........................metric in blockchain performance metrics

• Network

• Node

• Block

• Data

The adoption of blockchain infrastructure for ........................................... users, enables them to connect to the broader crypto-economy by making virtual objects exchangeable for real-world currency.

• DevOps

• Metaverse

• Cloud Computing

• e-government