free ICO Blockchain Foundation Exam Test

Which statements regarding the common bitcoin units are correct?

Which of the following statements are correct regarding the topic “proof of stake (POS)”?

In POS, it is not possible to take over the network solely by possessing computing power.
POS is NOT currently used in bitcoin.
The activity is called “forging”.

Which of the following systems describe symmetric cryptosystems?

What are the disadvantages of blockchain technology?

Which requirements are placed on a proof of work (POW)?

Which of the following statements on asymmetric encryption are correct?

"Asymmetric cryptosystem" is a generic term for public-key encryption, public-key authentication and digital signatures.
RSA (Rivest, Shamir and Adleman) is an asymmetric cryptographic method that can be used for both encryption and digital signing.
In an asymmetric encryption process, specially matched key pairs are used.

Which of the following statements regarding hash functions are true?

A hash function is a character string agreed between two parties that is used for authentication.
The cryptological hash function is a special form of the hash function which is collision resistant or a one-way function (or both).
MD5 (Message Digest Algorithm 5) is an example of a hash function

What features does a wallet have?

Bitcoins can be managed by means of a wallet
The wallet generates for every address a pair of keys, comprising a private and a public key
The pair of keys (public & private key) are converted into a public address (account number).

Which statements are true with regards to smart contracts?

Smart contracts are contracts that are based on computer protocols and ablockchain, but can not be executed and checked by themselves.
Smart contracts can replace a blockchain.
Smart contracts are comparable to conventional contracts.

What is promised by running a Blockchain and omitting the central, trusted third party (intermediary)?