Blockchain Interview Questions | Eklavya Online

Blockchain Interview Questions

What is Blockchain?

A Blockchain is a constantly growing ledger(file) that keeps a permanent record of all the transactions that have taken place, in a secure, chronological, and immutable way. It can be used for the secure transfer of money, property, contracts, etc. without requiring a third-party intermediary like bank or government. Blockchain is the backbone of the …

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What are the Merkle trees? What is its importance in blockchain?

Merkle tree is a fundamental part of blockchain technology. It is a mathematical data structure composed of hashes of different blocks of data, and which serves as a summary of all the transactions in a block. It also allows for efficient and secure verification of content in a large body of data. It also helps …

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What are the types of consensus algorithms?

There are many types of consensus algorithms or techniques available. The most popular consensus algorithm is: Proof-of-Work(PoW) Proof-of-Stake(PoS) Delegated Proof-of-Stake(DPoS) Proof-of-Authority(PoA) Proof-of-Elapsed Time(PoET) Byzantine Fault Tolerance

What are the different types of Blockchains?

The different types of blockchains which introduce to the world are: There are mainly three types of Blockchains introduced to the world. 1. Public Blockchain A Public blockchain is a kind of blockchain which is “for the people, by the people, and of the people.” There is no in-charge it means anyone can read, write, …

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What is Double Spending? Is it possible to double spend in a Blockchain system?

Double spending means spending the same money multiple times. In a physical currency, the double-spending problem can never arise. But in digital cash-like bitcoin, the double-spending problem can arise. Hence, in Bitcoin transactions, there is a possibility of being copied and rebroadcasted. It makes it possible that the same bitcoin could be spent twice by …

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What is a ledger? Name the common type of ledgers that can be considered by users in Blockchain?

A ledger is a file that is constantly growing. It keeps a permanent record of all the transactions that have taken place between two parties on the blockchain network. There are three common types of a ledger that can be considered by users in the blockchain: Centralized Network Decentralized Network Distributed Network

Why is Blockchain a trusted approach?

Blockchain is a trusted approach due to the following reasons: It is easily compatible with other business applications due to its open-source nature. It is safe, hacking proof and encrypted. There is no central authority to control it. All participants agreed to how a transaction inserted into the blockchain. The transaction is immutable means once …

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