What is a 51% attack and how to prevent it?

1

What type of records can be kept in a blockchain? Is there any restriction on the same?

1

What are off-chain transactions?

1

How important are merkle trees in blockchains?

1

Is it true that a block in the blockchain can never have more than one parent block?

1

What are the benefits of blockchain? Explain it from your viewpoint and understanding?

1

Blockchain is a distributed database. How does it differ from traditional databases?

5

What is blockchain?

1

Tell me more about rsa algorithm?

1

What are the merkle trees?

1

What are private blockchains?

1

You mentioned something about indexes. What determines the account index?

1

What is the lightning network?

5

Is the Blockchain Different from Banking Ledgers?

5

What do you know about blockchain? What is the difference between the bitcoin blockchain and ethereum blockchain?

1