🔗 Cryptography & Blockchain practice questions

Try 5 sample questions

1. What is a cryptographic hash function?

   A function that maps input data to a fixed-size output A function that encrypts and decrypts data A function that compresses files A function that sorts data

2. What is a blockchain at its core?

   A distributed ledger of linked blocks of data A type of encrypted database on a single server A password manager A file compression algorithm

3. In cryptocurrency, what is a wallet address?

   A public identifier derived from a public key A private secret only the owner knows A username you register with a company A physical device required to sign transactions

4. What does 'decentralization' mean in distributed systems?

   No single party controls the entire system The system runs on one powerful server The data is stored only on user devices The system has no rules

5. What is the relationship between a public key and a private key?

   They are a mathematically linked pair used in asymmetric cryptography They are the same key used twice The public key is created from a password They are unrelated random strings