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WorksheetsEthereum Devcon Quiz - 1
Total questions: 25
Worksheet time: 12mins
What is the primary purpose of a consensus mechanism in blockchain?
To ensure data privacy
To validate and agree on the state of the blockchain
To create new cryptocurrencies
To facilitate smart contracts
What is a "smart contract" ?
A traditional legal contract
A self-executing contract with terms written into code
A contract that requires a lawyer to execute
A software application for mining cryptocurrencies
Which of the following is a public blockchain?
Hyperledger Fabric
Ethereum
Corda
Quorum
In Ethereum, what does the "EVM" stand for?
Ethereum Value Management
Ethereum Virtual Machine
Ethereum Verification Model
Ethereum Virtual Memory
What is the function of a "block explorer"?
To allow users to view and search blockchain data
To provide a user interface for interacting with smart contracts
To mine new blocks
To store private keys securely
Which of the following best describes the concept of "staking" in blockchain?
Using computational power to validate transactions
Holding and locking up a cryptocurrency to support network operations and earn rewards
Executing smart contracts
Developing decentralized applications
What does "decentralization" mean in the context of blockchain technology?
All data is stored in a central database
Data is controlled by a single entity
Data is spread across multiple nodes with no single point of control
Transactions are always private
What is the primary purpose of a cryptocurrency wallet?
To mine new cryptocurrencies
To store digital keys and facilitate transactions
To create new blocks in a blockchain
To provide internet access
Which cryptographic technique is commonly used to ensure the integrity of data on a blockchain?
Hashing
Public key cryptography
Symmetric encryption
Digital signature
What is a "genesis block"?
The last block in a blockchain
A block that has not yet been validated
The first block in a blockchain
A block containing a reward
What does the term "fork" mean in the context of blockchain?
A new cryptocurrency
A split in the blockchain network resulting in two separate chains
A method of increasing transaction speed
A type of digital wallet
Data stored in the blockchain is ?
Read only
Write only
Editable
Immutable
Blockchain trilemma consists of which terms ?
Centralization,Security, Transaction cost
Centralization, Gas fee, Transaction cost
Scalability, Private key, Gas fee
Decentralization, Scalability, Security
What are the two types of fork ?
Hard fork and Soft fork
Upgradable fork and Sudden fork
Reversible fork and Irreversible fork
Agreed fork and Disagreed fork
If a hacker wanted to alter a blockchain, what percentage of the block copies would he have to alter?
Only his copy
1%
51%
100%
How does Blockchain achieve high availability?
Centralisation
High Performance server
Decentralisation
Request always go to single server
In blockchain, blocks are linked by ?
Hash of the next block
Hash of the previous block
Merkle Tree of the previous block
Merkle Tree of the next block
Is Blockchain a type of DLT ?
True
False
What is the term for the maximum amount of data that can be included in a block?
Block size
Block limit
Block capacity
Block weight
What is a "testnet" in blockchain?
The main blockchain network where real transactions occur
A separate blockchain used for testing and development purposes
A network of nodes that verifies transactions
A blockchain explorer
What does P2P stand for?
Person to Person
Point to Point
Picture to Picture
Peer to Peer
Which of the following is a feature of Blockchain ?
Traceability
Individual Control
Less data storage
Automatic bot detection
Which of the following is a commonly used cryptographic hash function in blockchain?
SHA-256
RSA
AES
DES
What do you mean by node in blockchain ?
A device connected to blockchain network
Block rewards given to user
Act as admin in network
An Application that Improves Transaction Speed
Blockchain and other DLT Systems are related to which version of the web ?
Web 2
Web 2.2
Web 4
Web 3
