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WorksheetsBlock Chain Technology
Total questions: 20
Worksheet time: 15mins
What is a continuously growing list of records which are linked and secured using cryptography?
a chain
a block
a blockchain
a cryptocurrency
Which of the following is popularly used for storing bitcoins?
wallet
box
stack
What does the block in the blockchain consist of?
Transaction data
A Hash point
A Timestamp
all of these
All blocks contain a link to the previous block, except for:
Block number 24601.
First block
thethird block
The second block.
This person invented Bitcoin.
Donald Trump
Sung Sam
Satoshi Nakamoto
Elon Musk
The "blockchain" is data that copied across thousands and thousands of computers worldwide
True
False
Bill Gates has commented on Bitcoin and said, "“Bitcoin is better than currency”.
True
False
The two methods of encrypting data are?
Substitution and transposition
Block and stream
Symmetric and asymmetric
DES and AES
Data that is in an unencrypted form is referred to as which of the following?
plain text
crypt text
cleartext
simpletext
In which type of encryption is the same key used to encrypt and decrypt data?
public
asymmetric
symmetric
private
What alternative term can be used to describe asymmetric cryptographic algorithms?
public key cryptography
user key cryptography
private key cryptography
cipher-text cryptography
What type of cryptography uses two keys on both ends i.e a private and a public key?
shared
asymmetric
symmetric
open
Plaintext
original message
coded message
algorithm for transforming plaintext to ciphertext
info used in cipher known only to sender/receiver
ciphertext
field of both cryptography and cryptanalysis
study of encryption principles/methods
converting plaintext to ciphertext
coded message
Non-repudiation
Ensure message remains secret during transmission between parties
Ensure message is not altered while in transit between communicating partners
Verifies sender is who she says she is
Proves that nobody but on sender could have sent a particular message
cryptography
study of principles/methods of deciphering ciphertext without knowing key
study of encryption and decryption principles and methods
field of both cryptography and cryptanalysis
coded message
Hash identifying each block in the blockchain is generated using which of the following cryptographic algorithm?
SHA128
SHA256
Both of them
None of them
In Blockchain, ----------- tree stores all the transactions in a block by producing a digital fingerprint of the entire set of transactions.
Merkle
Binary
AVL
Red black
What are the pillars of Block Chain Technology
Immutability
Transperency
Decentralization
All of above
