Skill Assessment Test
Time Remaining:
05:00
What is a blockchain?
A distributed ledger technology
A type of database
A programming language
A type of encryption
Which cryptocurrency was the first to use blockchain technology?
Bitcoin
Ethereum
Ripple
Litecoin
What does “decentralization” mean in blockchain?
The distribution of power and control across a network
The centralization of control in a single entity
The use of a central database
The use of a single server
What is the purpose of a “smart contract”?
To automate and enforce the terms of a contract using code
To store data
To create new blockchain blocks
To encrypt data
Which algorithm is commonly used for consensus in blockchain?
Proof of Work
Proof of Stake
Proof of Authority
All of the above
What is a “public key” in blockchain?
A cryptographic key that is shared publicly
A cryptographic key that is kept private
A key used to encrypt data
A key used to decrypt data
What is “mining” in blockchain?
The process of validating and adding transactions to the blockchain
The process of extracting data
The process of creating a new cryptocurrency
The process of hacking a blockchain
What is a “node” in blockchain?
A computer that participates in the blockchain network
A data storage unit
A type of cryptocurrency
A method of encryption
Which of the following is a benefit of blockchain?
Transparency
Security
Immutability
All of the above
What does “immutability” refer to in blockchain?
The inability to alter or change data once it is recorded
The ability to change data
The ability to delete data
The process of backing up data
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