Blockchain Developer Test 5 - Practice Test Geeks

Is it possible in Blockchain to remove one or more block from the networks?

Yes, it can be done

No, it is not possible

Sometimes

Correct! Wrong!

What are the parts of EVM memory

Storage, Memory and Stack

Database and storage

Front-end and Blockchain

None of the above

Correct! Wrong!

The _______ is the first block in the Blockchain which is also known as block 0

Consortium Block

Genesis block

Primary Block

None of these

Correct! Wrong!

_______ is a data structure that is used for verifying a block. It is in the form of a binary tree containing cryptographic hashes of each block

Blockchain

Merkel Tree

Ledger

Cryptography

Correct! Wrong!

In this stage and individual evaluates all requirements and decides a suitable blockchain platform to be implemented.

Controlling and monitoring the project

Development and implementation of a project

Planning stage

None of the above

Correct! Wrong!

What are the common types of records that can be kept on the Blockchains?

Records of medical transactions

Identity management

Transaction processing

All of these

Correct! Wrong!

Which is not popular consensus algorithm in the list

Digital workforce

PBFT (Practical Byzantine Fault Tolerance)

Proof-of-work

Proof-of-stake

Correct! Wrong!

Is it possible to modify the data once it is written in a block?

Yes it is possible

No, it’s not possible to do so

It depends

Correct! Wrong!

Why is Blockchain a trusted approach?

Blockchain can be trusted due to so many reasons.

Its compatibility with other business applications due to its open-source nature.

Its security. As it was meant for online transactions, the developers have paid special attention to keeping up the pace when it comes to its security.

All of the above

Correct! Wrong!

Name some leading open source platforms for developing Blockchain applications.

Ethereum

Eris

Hyperledger

All of the above

Correct! Wrong!

The ________ is a random value which is used to vary the value of the hash in order to generate hash value less than the target

Nonce

Hash value

Transaction data

Hash output

Correct! Wrong!