Ethereum – Blockchain
Q.1 The native currency of Ethereum network is _____.
- Mycoin
- Ether
- Bitcoin
- Litecoin
Correct answer : Ether
Q.2 _________requires lots of Electricity/Energy.
- Proof of Stake
- Proof of work
- Proof of Authority
- Blockchain
Correct answer : Proof of Authority
Q.3 The main advantage of Ethereum over Bitcoin is __.
- Smart contracts
- Transaction
- Mining
- Tokens
Correct answer : Smart contracts
Q.4 What are Ethereum tokens?
- Native currency
- Alternate currency
- Digital asset
- Mining reward
Correct answer : Digital asset
Q.5 Ethereum tokens are created by using __.
- Application
- Smart contracts
- Dapps
- Software
Correct answer : Smart contracts
Q.6 How many rewards (Wei/Ether) does the miner receive for adding a block to the chain?
- 5 Ether
- 5 Wei
- 5*e15 Wei
- 5*e9 Wei
Correct answer : 5 Ether
Q.7 How many lower denominations does the Ether have?
- 3
- 10
- 6
- 5
Correct answer : 6
Q.8 What is the smallest unit of Ether?
- Gwei
- Wei
- Kwei
- Mwei
Correct answer : Wei
Q.9 The time taken for mining one block in Ethereum is _.
- 14 Seconds
- 1 Seconds
- 10 Seconds
- 10 Minutes
Correct answer : 14 Seconds
Q.10 EVM stands for _.
- Ethereum Virtual Machine
- Ether Value Mechanism
- Ether Value Measure
- Ether Virtual Measure
Correct answer : Ethereum Virtual Machine
Q.11 Based on the storage of keys, wallets are classified into __.
- Custodial and Non-custodial
- Hot and Cold
- Private and Public
- Desktop and Mobile
Correct answer : Hot and Cold
Q.12 Ethereum Client’s Command Line Interface can be used for _.
- Create transactions
- Run smart contracts
- Mining
- Join the Ethereum network
- All the options
Correct answer : All the options
Q.13 All normal transactions are __.
- Private transactions
- Multi-signature Transactions
- Public transactions
- Single-signature Transactions
Correct answer : Single-signature Transactions
Q.14 MetaMask wallet is a Browser Extension.
- True
- False
Correct answer : True
Q.15 Wallets and Ethereum Clients are used to interact with Ethereum network.
- True
- False
Correct answer : True
Q.16 How is transaction fee calculated?
- Gas Limit-Gas used) * gas price
- Gas used * gas price
- Gas used * Gas Limit
- Gas used + gas price
Correct answer : Gas used * gas price
Q.17 __ is a personal testnetwork that is a part of truffle suite.
- Kovan
- Ropsten
- Ganache
- Goerli
Correct answer : Ganache
Q.18 Configuration file of Truffle is?
- truffle-configuration.js
- truffle-config.ts
- truffle-config.js
- truffle.js
Correct answer : truffle-config.js
Q.19 Solidity is a _ language.
- Turing incomplete
- Turing Complete
- Interpreted
- Dynamic
Correct answer : Turing Complete
Q.20 Remix IDE cannot be used with a Browser.
- True
- False
Correct answer : False
Q.21 Remix IDE can be locally installed.
- True
- False
Correct answer : True
Q.22 Which is the command to install truffle?
- npm install -g truffleSuite
- npm install -g truffleCompiler
- npm install truffleSuite
- npm install -g truffle
Correct answer : npm install -g truffle
Q.23 Which of the following is a geth command?
- geth.accounts
- eth.account
- geth.getAccounts
- eth.getAccounts
Correct answer : geth.accounts
Q.24 If the actual Gas used in a Contract execution is less than the Gas specified by the user, the additional amount is returned.
- True
- False
Correct answer : True
Q.25 Solidity is a statically typed language.
- True
- False
Correct answer : True
Q.26 Truffle can be used for __
- Testing Contracts.
- Debugging contracts
- Compiling Contracts, Deploying Contracts
- Creating front-end for DApps
- All the options
Correct answer : All the options
Q.27 For EIP to become a new ERC, _____.
- Approved by Ethereum Committee
- Deployed in the Blockchain
- Is to follow coding standards
- Is to be coded properly
Correct answer : Approved by Ethereum Committee
Q.28 ______signifies the amount of gas to be spent for a transaction.
- Ether
- Gas limit
- Gas price
- Ether limit
Correct answer : Gas limit
Q.29 Which of the following is a Proof of Work implemented test network?
- Ganache
- Ropsten
- Rinkeby
- Kovan
Correct answer : Ropsten
Q.30 Which of the follwing is an extension of Solidity file?
- .json
- .sol
- .bat
- .class
Correct answer : .sol
Q.31 _______contains the Development Environment, testing Framework, and the asset pipeline.
- Metamask
- Truffle
- Ganache
- Mist
Correct answer : Truffle
Q.32 __ functions can only be called from inside the present contract, and cannot be called by the inherited contracts.
- External
- Internal
- Private
- Public
Correct answer : Private
Q.33 How the ether is brought into the Ethereum system?
- Issued by participation
- Exchanging with bitcoin
- Mining
- Buying
Correct answer : Mining
Q.34 MetaMask wallet is a __.
- Browser Extension
- Physical wallet
- Hot Wallet
- Full Node Wallet
Correct answer : Browser Extension
Q.35 Which control structure is not supported by Solidity?
- Switch
- Do while
- While
- for
Correct answer : Switch
Q.36 What is the denomination used in Ethereum?
- Ether
- Kei
- Wei
- Bitcoin
Correct answer : Wei
Q.37 Ethereum network is classified into _.
- Public and Consortium blockchain
- Public and Private blockchain
- Consortium and Private blockchain
- Public, Private and Consortium blockchain
Correct answer : Public, Private and Consortium blockchain
Q.38 _ is a collection of libraries used to create easy and better front-end for Ethereum DApps.
- Drizzle
- Truffle
- Ganache
- Crizzle
Correct answer : Drizzle
Q.39 What is the token used for executing Smart Contracts?
- Ether
- Bitcoin
- Gas
- Dollars
Correct answer : Gas
Q.40 How can one send ethers?
- Between accounts on the same network
- Between accounts on any network
- Between accounts on any private network
- All the options
Correct answer : Between accounts on the same network
Q.41 Ethereum Virtual Machine supports turing complete languages.
- True
- False
Correct answer : True
Q.42 Contract Accounts have code associated with them.
- True
- False
Correct answer : True
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