Free EXIN Blockchain Foundation Exam BLOCKCHAINF Exam Practice Test

Once a record has been added to a Blockchain it can be altered.

• True
• False

A Blockchain provides .

• true information by all parties involved
• a trusted transaction between untrusted parties
• the easiest way to conduct international transactions
• only trusted banks for conducting transactions

One of the big issues that new financial transaction Blockchain solutions face is .

• increasing the number of transactions per second (TPS)
• the inability to find use cases
• solving user identity
• getting banks to cooperate

What is a private Blockchain used instead of a public one?

• It is less expensive to develop
• It requires less mining power that a public Blockchain
• To limit user access and permissions
• It requires fewer administrators to manage it

Which of the following problems did Blockchain solve for cryptocurrencies?

• Anonymity
• Double Spending
• Destination of currencies
• None of the above

Transactions per second (TPS) for a Proof-of-Work Blockchain are approximately?

• 24K per second
• 175K per second
• Only limited to the number of nodes on the network
• 7-15 per second
• None of the above

A distributed network is always decentralized.

• True
• False

What are the drawbacks of using Blockchain? Select all that apply

• High cost of developers
• Changing technology and the lack of a stable standard
• Its use of cryptography
• Its use of new applications

An asset is defined as .

• all records on a database
• any data on the ledger
• anything of value requiring accountability of ownership
• any record on a private network

How much data can be represented by the data hash of a block?

• a maximum of 20 MB
• virtually any amount
• not to exceed 100k bytes
• the hash is only a memory location