Blockchain Intermedio
Fresco play Exam:-
Blockchain is a distributed______.
A)Ledger
B)Server
C)System
D)computer
Answer:-A)Ledger
In private blockchains, you can create your own tokens for transactions.
A)True
B)False
Answer:-A)True
Which style of programming is well suited for Smart Contract programming?
Choose the correct option from below list
(1)Regular
(2)Defensive
(3)Modular
(4)Functional
Answer:-(2)Defensive
A smart contract is a business logic or a legal agreement that is coded using a programming language.
A)True
B)False
Ans:A)True
Ether tokens can be used to buy Gas.
A)False
B)True
Ans:- B)True
What are the two types of forks?
A)Alive, dead
B)Simple, complicated
C)Temporary, permanent
D)Hard fork, soft fork
What are the two main types of cryptography?
A)Strict, Not strict
B)Private, Public
C)Local, Global
D)Symmetric, Asymmetric
A hash function should produce different output strings for the same input data.
A)True
B)False
Public blockchains are goverened by communities.
A)False
B)True
Which of the following blockchain is used for non currency, industrial application?
Choose the correct option from below list
(1)Hyperledger
(2)Bitcoin
(3)Litecoin
(4)Ethereum
Answer:-(1)Hyperledge
Ethereum is a programmable blockchain.
Answer:-True
Which type of cryptography is also called public key cryptography?
A)symmetric
B)dual key cryptography
C)asymmetric
D)public
| _____ is a mechanism that allows digital assets from one blockchain to be used as a separate blockchain. Choose the correct option from below list (1)Subchain (2)Sidechain (3)Bitcoin (4)Forkchain Answer:-(2)Sidechain Which release of Ethereum will have Proof of Stake Consensus algorithm. A)Constantinople Which type of accounts are programmable accounts in ethereum? A)Private accounts |
_____ is a javascript library that allows you to interact with Ethereum.
A)D3.js
B)Web3.js
C)jQuery
D)Angular
______ are systems that provide external data sources to smart contracts.
A)Tokens
B)Fortunes
C)Oracles
D)Routers
_____ contains hash of previous block and all the important information required by the block.
Choose the correct option from below list
(1)block header
(2)block metadata
(3)chain
(4)block footer
Answer:-(1)block header
Ether and Gas are the two types of tokens in ethereum.
Choose the correct option from below list
(1)True
(2)False
Answer:-(1)True
What is the Consensus algorithm used by Ethereum?
A)Eth Consensus
B)Dagger hashimoto
C)Ethash
D)Ethereum Hash
Which of the following is a Ethereum test network?
A)testnet
B)Ropsten
C)Ethertest
D)testnet3
Which type of cryptography is also called public key cryptography?
A)symmetric
B)dual key cryptography
C)asymmetric
D)public
_____ is a open source platform founded by Linux for private blockchain development.
A)Hyperledger
B)Ethereum
C)Bitcoin
D)R3Corda
______ is a way of verifying the authenticity of digital messages and documents over the internet.
A)Digital Imprint
B)Password
C)Digital Signature
D)Fingerprint
______ are systems that provide external data sources to smart contracts.
Choose the correct option from below list
(1)Routers
(2)Fortunes
(3)Oracles
(4)Tokens
Answer:-(3)Oracles
Which release of Ethereum will have Proof of Stake Consensus algorithm.
Choose the correct option from below list
(1)Casper
(2)Serenity
(3)Constantinople
(4)Juniper
Answer:-(2)Serenity
Permissioned blockchains usually use PBFT algorithms.
Choose the correct option from below list
(1)True
(2)False
Answer:-(1)True
In ______ mechanism, the miner is selected based on reputation built over time.
Choose the correct option from below list
(1)Stake-based
(2)Reputation-based
(3)Elapsed Time
(4)Power-based
Answer:-(2)Reputation-based
| Which of the following is a Leader election-based consensus mechanism? Choose the correct option from below list (1)Proof of Work (2)Proof of Stake (3)Proof of Deposit (4)Proof of Elapsed Time Answer:-(1)Proof of Work |
Which consensus algorithm requires the users to have a stake in the blockchain?
Choose the correct option from below list
(1)Proof of Elapsed Time
(2)Proof of Identity
(3)Proof of Stake
(4)Proof of Work
Answer:-(3)Proof of Stake
The Proof of Elapsed Time (PoET) concept was developed by ______ in early 2016.
Choose the correct option from below list
(1)Intel
(2)IBM
(3)Apple Computers
(4)Microsoft
Answer:-(1)Intel
_____ are a set of rules that verify and add transactions to a blockchain
A)Blocks
B)Consensus mechanisms
C)Laws
D)Mathematical formulas
Answer:-B)Consensus mechanisms
Nodes are independent computing units of a distributed system.
Choose the correct option from below list
(1)True
(2)False
Answer:-(1)True
What does C stands for in CAP theorem?
Choose the correct option from below list
(1)Computation
(2)Capacity
(3)Consistency
(4)Correct
Answer:-(3)Consistency
You can perform CRUD operations on a blockchain.
Choose the correct option from below list
(1)False
(2)True
Answer:-(1)False
_____ is a process of verifying transactions, bundling them into blocks, and adding those blocks to the blockchain.
Choose the correct option from below list
(1)Coding
(2)Digging
(3)Filtering
(4)Mining
Answer:-(4)Mining
Bitcoin is a public, permisionless blockchain.
Choose the correct option from below list
(1)False
(2)True
Answer:-(2)True
What is the total number of bitcoins that can ever exist?
A) 21 millionWhich of these is a major limitation of blockchain technology?
Choose the correct option from below list
(1)Scalability
(2)Immutability
(3)Anonymity
(4)Decentralization
Answer:-(1)Scalability
| A peer to peer network of autonomous computers is a ______. Choose the correct option from below list (1)Client (2)Super Computer (3)Server (4)Distributed System Answer:-(4)Distributed System |
_____ are a collection of transactions bundled together to be added to a blockchain.
Choose the correct option from below list
(1)Boxes
(2)Blocks
(3)Algorithms
(4)Nodes
Answer:-(2)Blocks