50 Questions
What does OP_CHECKSIG do in Bitcoin scripts?
Verify the digital signature of the transaction
Which component of a Bitcoin transaction contains the recipient address?
scriptPubKey
What is the purpose of scriptSig in a Bitcoin transaction?
Contains the digital signature to prove ownership of funds
In Bitcoin, what are 'addresses' referred to as in terms of scripts?
OP_DUP
What is verified by OP_EQUALVERIFY in a Bitcoin transaction script?
The output value matches the input value
What type of ledger is used in Bitcoin transactions?
Transaction-based ledger
Which cryptographic operation is used in Bitcoin to verify transactions?
SHA-256 hashing
What is the purpose of scriptPubKey in a Bitcoin transaction?
To verify the transaction with the recipient's public key
What does OP_CHECKSIG do in Bitcoin scripting?
Checks if a signature is valid for a given public key
What role does Pay-to-Pubkey-Hash (P2PKH) play in Bitcoin transactions?
Ensures that only the intended recipient can spend the funds
What is the purpose of OP_CHECKSIG in a Bitcoin transaction?
To verify that the provided signature corresponds to the public key in the scriptPubKey
In a Pay-to-Pubkey-Hash (P2PKH) transaction, what does the recipient need to provide in order to spend the coins?
Both the signature and the public key
What is included in the scriptSig of a Bitcoin transaction?
The current transaction data
Why can't a sender provide a full public key in a Bitcoin address when using Pay-to-Pubkey-Hash (P2PKH)?
To protect the privacy of the recipient
What is verified by scriptPubKey in a Bitcoin transaction?
The hash of the provided public key
What is the main difference between fully validating nodes and lightweight nodes on the Bitcoin network?
Fully validating nodes store the entire blockchain, while lightweight nodes only store pieces needed to verify specific transactions.
As of the end of 2014, how many gigabytes did fully validating nodes need to store for the entire blockchain?
26 GB
Why do lightweight nodes differ from fully validating nodes in terms of blockchain storage?
Lightweight nodes store only specific pieces needed to verify transactions.
What is the purpose of storing the Unspent Transaction Output (UTXO) set in memory?
To fit within RAM capacity
How do lightweight nodes manage storage costs compared to fully validating nodes?
Lightweight nodes have lower storage costs due to not storing the entire blockchain.
What is the purpose of OP_CHECKSIG in a Bitcoin transaction?
To verify the digital signature of the transaction.
What does scriptPubKey represent in a Bitcoin transaction?
It represents the conditions that must be met for the recipient to spend the coins.
What information does scriptSig contain in a Bitcoin transaction?
scriptSig contains the unlocking script that provides the necessary data to fulfill the locking conditions (scriptPubKey).
What does Pay-to-Pubkey-Hash (P2PKH) require the recipient to provide in a Bitcoin transaction?
The recipient needs to provide a public key hash (address) to spend the coins.
What component of a Bitcoin transaction contains the recipient's address?
The scriptPubKey of an output contains the recipient's address.
How is the authenticity of a Bitcoin transaction verified using OP_CHECKSIG?
OP_CHECKSIG verifies that the signature matches the public key associated with the address.
What is the purpose of OP_CHECKSIG in a Bitcoin transaction script?
OP_CHECKSIG is used to verify the digital signature of the transaction.
What component of a Bitcoin transaction contains the recipient address?
The scriptPubKey contains the recipient address in a Bitcoin transaction.
What is included in the scriptSig of a Bitcoin transaction?
The scriptSig includes the digital signature and the public key of the sender.
In a Pay-to-Pubkey-Hash (P2PKH) transaction, what does the recipient need to provide in order to spend the coins?
The recipient needs to provide the public key and a digital signature to spend the coins.
Why can't a sender provide a full public key in a Bitcoin address when using Pay-to-Pubkey-Hash (P2PKH)?
Providing the full public key would compromise the security of the address.
What is the main purpose of the Bitcoin address?
The Bitcoin address is used to receive and send Bitcoin transactions.
What is the role of OP_CHECKSIG in a Bitcoin transaction?
OP_CHECKSIG is used to validate that the provided signature was generated by the private key corresponding to the public key.
What does scriptPubKey do in a Bitcoin transaction?
scriptPubKey verifies that the provided public key hashes to the hash in the scriptPubKey, and then it checks the signature against the public key.
What is the purpose of scriptSig in a Bitcoin transaction?
scriptSig in a Bitcoin transaction is used to combine with scriptPubKey to verify the transaction by adding the signature and public key to the stack.
How does Pay-to-Pubkey-Hash (P2PKH) work in Bitcoin transactions?
In a P2PKH transaction, the recipient needs to provide both the signature and the public key to spend the coins. The script verifies that the public key hashes to the hash in scriptPubKey.
Why can't a sender provide a full public key in a Bitcoin address when using Pay-to-Pubkey-Hash (P2PKH)?
A sender can't provide a full public key in a Bitcoin address with P2PKH because the address is only a hash, not the full public key.
What is the significance of a Bitcoin address in terms of scripts?
A Bitcoin address is a hash that allows the sender to provide a secure way of transferring funds without revealing the full public key.
What role does scriptPubKey play in a Bitcoin transaction?
It defines the conditions that must be met to spend the coins.
Why can't a sender provide a full public key in a Bitcoin address when using Pay-to-Pubkey-Hash (P2PKH)?
To enhance privacy and security by not revealing the full public key until the coins are spent.
What is the purpose of scriptSig in a Bitcoin transaction?
It contains the signature and public key necessary to spend the coins.
What does OP_CHECKSIG do in Bitcoin transaction scripts?
It verifies the signature against the public key.
In a Pay-to-Pubkey-Hash (P2PKH) transaction, what does the recipient need to provide in order to spend the coins?
The recipient needs to provide the public key and a signature.
What is a Bitcoin address referred to as in terms of scripts?
A Bitcoin address is referred to as a scriptPubKey.
What does OP_CHECKSIG do in Bitcoin scripting?
OP_CHECKSIG is used to verify the digital signature of a transaction.
What does scriptPubKey represent in a Bitcoin transaction?
scriptPubKey contains the conditions that must be met to spend the transaction output.
What is the purpose of scriptSig in a Bitcoin transaction?
scriptSig contains the digital signature and public key needed to unlock the funds.
What role does Pay-to-Pubkey-Hash (P2PKH) play in Bitcoin transactions?
P2PKH requires the recipient to provide a public key hash to receive funds.
What is a Bitcoin address used for?
A Bitcoin address is used to receive and send Bitcoin transactions.
Why can't a sender provide a full public key in a Bitcoin address when using Pay-to-Pubkey-Hash (P2PKH)?
To enhance security and privacy, P2PKH only requires the recipient to provide a public key hash.
Test your knowledge on cryptocurrency transaction metadata including transaction hash, lock time, size, and more. Understand the significance of unique IDs and signatures in transactions and the importance of permission in distributing copyrighted materials.
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