R3 Corda Interview Question-Answer

Q.1 Which of the following is a similarity between bitcoin and R3 Corda?

       A. Both have cryptocurrency

       B. Both are public blockchain platforms

       C. Both have immutable states

       D. Both support Turing complete programs

Ans : Both are public blockchain platforms


Q.2 In R3 Corda, _______ is used as a consensus mechanism.

       A. Database Administrator

       B. Verification Service

       C. Notary service

       D. Consensus Service

Ans : Consensus Service


Q.3 Smart Contracts in R3 Corda are written using programming languages like ______ and _____.

       A. Go , C++

       B. Java, Python

       C. Solidity, Vyper

       D. Java, Kotlin

Ans : Java, Kotlin


Q.4 The Corda vision is a _______ in which all economic factors can transact with full privacy, autonomy, and security, and in an auditable manner.

       A. Shared global logical ledger

       B. Platform

       C. Central database

       D. Network

Ans : Shared global logical ledger


Q.5 Every node in the R3 Corda network has the same view of the ledger.

       A. True

       B. False

Ans : False


Q.6 R3 Corda is a private, permissioned blockchain.

       A. True

       B. False

Ans : True


Q.7 __________ is a distributed ledger technology where data is stored in the form of blocks.

       A. Blockchain

       B. Database

       C. Cryptocurrency

       D. Contracts

Ans : Blockchain


Q.8 _______ include data shared between two more or more nodes in a network.

       A. Data

       B. Messages

       C. Shared fact

       D. Contracts

Ans : Contracts


Q.9 ________ are a set of rules that determine the execution of a transaction.

       A. Program

       B. Instruction

       C. Tables

       D. Contracts

Ans : Contracts


Q.10 Communication between nodes occur in the context of flows, and is point to point.

       A. True

       B. False

Ans : True


Q.11 ___________ is the core business logic on which CorDapps run.

       A. Transaction

       B. Contract

       C. Legal prose

       D. Flow framework

Ans : Transaction


Q.12 A Flow Library contains a set of ______ used for common tasks like notarizing a transaction, gathering required signatures, etc.

       A. Flows

       B. Contracts

       C. Transactions

       D. Cordapps

Ans : Flows


Q.13 Corda states are immutable objects.

       A. True

       B. False

Ans : True


Q.14 Every node in an R3 Corda network has ______ associated with it.

       A. Instances

       B. States

       C. Objects

       D. Private databases

Ans : Objects


Q.15 A Flow Library contains a set of ______ used for common tasks like notarizing a transaction, gathering required signatures, etc.

       A. Flow

       B. Contracts

       C. Cordapps

       D. Transactions

Ans : Flow


Q.16 A _______ is a database in the node where all states are stored.

       A. State database

       B. Central database

       C. Vault

       D. Blockchain

Ans : State database


Q.17 What are the two types of transactions?

       A. Notary change and Generic

       B. Common and Special

       C. Dynamic and Static

       D. State and Non-state

Ans : State and Non-state


Q.18 ___________ is the core business logic on which CorDapps run.

       A. Contract

       B. Transaction

       C. Fow Framework

       D. Legal Prose

Ans : Transaction


Q.19 What happens when shared facts associated with a node change?

       A. States are modified.

       B. Old states are marked historic, and new states are created.

       C. Old states are deleted, and new states are created

       D. Old and new states are merged.

Ans : Old states are marked historic, and new states are created.


Q.20 Oracles are an external piece of information used by contracts.

       A. True

       B. False

Ans : True


Q.21 A _______ is a database in the node where all states are stored.

       A. Blockchain

       B. State database

       C. Central database

       D. Vault

Ans : Vault


Q.22 What service is used to discover nodes on a Corda network?

       A. Finder service

       B. Searching service

       C. Discovery service

       D. Network map service

Ans : Network map service


Q.23 Validity Consensus and Uniqueness Consensus are the two types of consensus.

       A. True

       B. False

Ans : True


Q.24 A Corda network needs certificates to maintain the unique identity of nodes.

       A. True

       B. False

Ans : True


Q.25 A ______ is a JVM runtime environment that has a unique identity on the Corda network.

       A. Contract sandbox

       B. Node

       C. Transaction

       D. Network identifier

Ans : Node


Q.26 Uniqueness consensus solves the ______ problem.

       A. Zero spending

       B. Verification

       C. Agreement

       D. Double spending

Ans : Double spending


Q.27 ______ are applications that execute Smart contracts on the Corda platform.

       A. Distributed app

       B. dapps

       C. Cordapps

       D. Smart app

Ans : Cordapps


Q.28 Which of the following transactions have zero inputs?

       A. Opening

       B. Genesis

       C. Issuance

       D. Intial

Ans : Issuance


Q.29 Which of the following transactions have no output?

       A. Issuance

       B. Exits

       C. Terminal

       D. Genesis

Ans : Exits


Q.30 Corda was initially developed for ______ institutions.

       A. Political

       B. Educational

       C. Cultural

       D. Financial

Ans : Financial


Q.31 ______ are large chunks of data that can be reused across multiple transactions, and are also used for transaction validity.

       A. Attachments

       B. Oracles

       C. Transactions

       D. Files

Ans : Attachments


Q.32 ________ are unique time-stamping services that order transactions, and are responsible for consensus in the Corda network.

       A. Flow framework

       B. Smart contracts

       C. Notary pool

       D. Transaction pool

Ans : Notary pool


Q.33 When new states are created, old states are not deleted, but marked as ______.

       A. Extinct

       B. Historic

       C. Deprecated

       D. Obselete

Ans : Historic


Q.34 A Genesis block is the first block of the blockchain.

       A. True

       B. False

Ans : True


Q.35 Notary clusters are classified according to their ______ and consensus algorithms.

       A. Structure

       B. Visibility

       C. Content

       D. Size

Ans : Structure


Q.36 Spreading transaction load over multiple notary clusters to allow higher transaction throughput is called?

       A. Transaction distribution

       B. Transaction split

       C. Load balancing

       D. Transaction processing

Ans : Load balancing


Q.37 Transactions are atomic in nature.

       A. True

       B. False

Ans : True


Q.38 R3 Corda and Bitcoin use which computational model.

       A. Unspent Transaction Output (UTXO)

       B. Internal Execution

       C. Virtual Computing

       D. Modular

Ans : Unspent Transaction Output (UTXO)


Q.39 Each block in a blockchain contains the hash of the _________.

       A. Next block

       B. Previous block

       C. Genesisblock

Ans : Previous block


Q.40 ______ is a superset of blockchain technology, and both terminologies are used interchangeably.

       A. Bitcoin

       B. Ethereum

       C. Distributed Ledger Technology

       D. Multichain

Ans : Distributed Ledger Technology


Q.41 The Corda network is like a complete graph where all the nodes are connected.

       A. True

       B. False

Ans : True


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