Quiz for Blockchain & Cryptocurrency

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What is the primary role of cryptographic hashing in blockchain?

• To compress data for storage efficiency
• To generate unique addresses for users
• To ensure data integrity and create immutable links between blocks
• To increase the processing speed of transactions

In a blockchain transaction, what happens after a transaction is verified?

• It is deleted if not needed
• It is added to a new block
• It is sent to a bank for approval
• It is stored in a private folder

Which blockchain platform introduced smart contracts?

• Bitcoin
• Ethereum
• Hyperledger
• Ripple

How does a blockchain ensure that transactions cannot be altered?

• By using strong passwords
• Through encryption and hashing
• By keeping a single record in a private database
• By allowing only one administrator to edit transactions

What is blockchain technology?

• A centralized database system
• A distributed and decentralized digital ledger
• A type of cloud storage
• A form of physical record-keeping

Which of the following is a common cryptocurrency scam where fraudsters promise high returns using money from new investors?

• Phishing Scam
• Ponzi Scheme
• Rug Pull
• SIM Swap Attack

What is a “rug pull” in cryptocurrency?

• A security measure to protect private keys
• A sudden drop in crypto prices due to market corrections
• A scam where developers raise funds and abandon the project
• A method of securing crypto wallets

How can you protect yourself from phishing scams in crypto?

• Click on all links in emails that look official
• Store private keys in an online notepad
• Verify URLs before logging in and avoid suspicious links
• Share your seed phrase with trusted friends