EXAM : CERTIFIED BLOCKCHAIN
SOLUTIONS ARCHITECT
QUESTIONS & ANSWERS(GRADED
A+)
"If a hardfork appears on a public blockchain software
- 20 running nodes choose not to update
- What can be said about the 20 nodes ? - ANSWER" "The 20 nodes are running on
a different blockchain network
- than the nodes that were updated
"
"What is the best practice
- preventing contract addresses from changing
- when a new contract is released - ANSWER" "Use the ""- addressForce""
parameter
- when releasing a new contract
"
"Data structure to create a lightweight data fingerprint
- of all transactions in the block - ANSWER" Merkle Tree
Proof of Stake is most required and implemented by - ANSWERBlockchains that
manage wealth and asset
Transsactions can only be added to the blockchain - ANSWERTRUE
"To prevent duplicate addresses/accounts from being generated, on the same
blockchain network
- the input for the hash function that generates the address - ANSWER" should
contain enough entropy/randomness
To determine the anticipated load on an application, the number of end users should
be considered along with - ANSWERThe average no of transactions per user
In public key cryptography, the private key is used to.. - ANSWER"Sign/Approve any
transaction,
- that might be made by any holder of the key pair
"
Records on the public blockchain are deleted by - ANSWERThey cannot be deleted
Two main types of transactions that can be performed are - ANSWER"Deploy
Transactions
,Invoke Transactions
"
21. To approve pending ledger transactions, consensus algorithms often implement -
ANSWERBizantyne Fault Tolerance
22. It is impossible to persist media types such as MP3 and MOV on any distributed
ledger - ANSWERFALSE
23. Which of the following is TRUE regarding Smart Contracts on the Ethereum
Blockchain - ANSWERThey are Turing Complete and deterministic in nature
In public key cryptography, public key is used in - ANSWEREncrypt the private key
How are blocks of data chained together to ensure integrity of transactions -
ANSWER"The hash of the previous block
- is writtent to the header of the current block
"
A Smart Contract is most like which classical programming object -
ANSWERFunction
Which scenario would be most appropriate for a blockchain solution to implement a
Proof of Work or Proof of Stake Consensus ? - ANSWER"Aim of the blockchain
- to be trustless as possible
"
Byzantine Fault Tolerance can be achieved only through Proof of Work - ANSWERA.
FALSE
Complex application components should try to be concentrated in which App Layer -
ANSWERPresentation / Top
"When a blockchain software is updated with new functionality that breaks/modifes
- the rules of the prev version of the software
- What has just occurred - ANSWER" A Hard Fork
Blockchain addresses or "Accounts" are generated by - ANSWER"Creating a hash
based on a cryptographic public key
- and various meta data
"
In a Proof - Of -Work group consensus , the nounce refers to - ANSWER"The
random data
- that can be combined with the block data
- which will produce a hash output
- matching the current difficulty level
"
, Types of data are able to be stored on any given blockchain ledger -
ANSWEREncrypted textual and numerical data
Identity and transaction approval is possible through - ANSWERNone of the above
"A product's supply chain data is stored on blockchain
- Only members of the Product Supply chain can write announcements to the
blockchain
- Any consumer can query the data in a store to learn more about the product they
want to buy.
This is an example of - ANSWER" Private / Open - Blockchain Type
Ownership or Partial Ownership of an asset can be tracked with which type of token
- ANSWERUtility
Proof of Stake offers which advantage over Proof of Work - ANSWER"* Greater
Transaction speed
* Compatible with new generation chipsets
* Longer History / Deeper Knowledge Base
* Answer : None of the above
"
Transactions can only be added to a blockchain - ANSWERFALSE
A consideration that must be taken into account when working with Hyperledger
Fabric - ANSWERHow often Hard Forks occur on the software
What is true about Hyperledger Fabric - ANSWER"Because it is permissioned
- It is impossible to display data to the public
"
"A Large departmental store chain is being pressured by Lawmakers to
- provide evidence that proves that stores clothing is not produced through child
labour.
- Store's clothing is being transferred between atleast 6 different parties in between
creation and placement at the storefront
- The store is considering use of blockchain
-- Descretion in the reading and writing of transactions
- How will you design the solution - ANSWER" "Use a public blockchain
- that supports Assets | Create a new clothing ""Asset""
- When the clothing is transferred to the next party in the process
- the associated blockchain asset be transferred to the next party's blockchain
account
-- with relevant meta data.
- The lawmakers can now view the transactions and transfers at any time
"
A private blockchain such as HyperLedger would be the right choice for which
scenario - ANSWER"An enterprise that needs to build
- scalable, secure, permissioned blockchain application
SOLUTIONS ARCHITECT
QUESTIONS & ANSWERS(GRADED
A+)
"If a hardfork appears on a public blockchain software
- 20 running nodes choose not to update
- What can be said about the 20 nodes ? - ANSWER" "The 20 nodes are running on
a different blockchain network
- than the nodes that were updated
"
"What is the best practice
- preventing contract addresses from changing
- when a new contract is released - ANSWER" "Use the ""- addressForce""
parameter
- when releasing a new contract
"
"Data structure to create a lightweight data fingerprint
- of all transactions in the block - ANSWER" Merkle Tree
Proof of Stake is most required and implemented by - ANSWERBlockchains that
manage wealth and asset
Transsactions can only be added to the blockchain - ANSWERTRUE
"To prevent duplicate addresses/accounts from being generated, on the same
blockchain network
- the input for the hash function that generates the address - ANSWER" should
contain enough entropy/randomness
To determine the anticipated load on an application, the number of end users should
be considered along with - ANSWERThe average no of transactions per user
In public key cryptography, the private key is used to.. - ANSWER"Sign/Approve any
transaction,
- that might be made by any holder of the key pair
"
Records on the public blockchain are deleted by - ANSWERThey cannot be deleted
Two main types of transactions that can be performed are - ANSWER"Deploy
Transactions
,Invoke Transactions
"
21. To approve pending ledger transactions, consensus algorithms often implement -
ANSWERBizantyne Fault Tolerance
22. It is impossible to persist media types such as MP3 and MOV on any distributed
ledger - ANSWERFALSE
23. Which of the following is TRUE regarding Smart Contracts on the Ethereum
Blockchain - ANSWERThey are Turing Complete and deterministic in nature
In public key cryptography, public key is used in - ANSWEREncrypt the private key
How are blocks of data chained together to ensure integrity of transactions -
ANSWER"The hash of the previous block
- is writtent to the header of the current block
"
A Smart Contract is most like which classical programming object -
ANSWERFunction
Which scenario would be most appropriate for a blockchain solution to implement a
Proof of Work or Proof of Stake Consensus ? - ANSWER"Aim of the blockchain
- to be trustless as possible
"
Byzantine Fault Tolerance can be achieved only through Proof of Work - ANSWERA.
FALSE
Complex application components should try to be concentrated in which App Layer -
ANSWERPresentation / Top
"When a blockchain software is updated with new functionality that breaks/modifes
- the rules of the prev version of the software
- What has just occurred - ANSWER" A Hard Fork
Blockchain addresses or "Accounts" are generated by - ANSWER"Creating a hash
based on a cryptographic public key
- and various meta data
"
In a Proof - Of -Work group consensus , the nounce refers to - ANSWER"The
random data
- that can be combined with the block data
- which will produce a hash output
- matching the current difficulty level
"
, Types of data are able to be stored on any given blockchain ledger -
ANSWEREncrypted textual and numerical data
Identity and transaction approval is possible through - ANSWERNone of the above
"A product's supply chain data is stored on blockchain
- Only members of the Product Supply chain can write announcements to the
blockchain
- Any consumer can query the data in a store to learn more about the product they
want to buy.
This is an example of - ANSWER" Private / Open - Blockchain Type
Ownership or Partial Ownership of an asset can be tracked with which type of token
- ANSWERUtility
Proof of Stake offers which advantage over Proof of Work - ANSWER"* Greater
Transaction speed
* Compatible with new generation chipsets
* Longer History / Deeper Knowledge Base
* Answer : None of the above
"
Transactions can only be added to a blockchain - ANSWERFALSE
A consideration that must be taken into account when working with Hyperledger
Fabric - ANSWERHow often Hard Forks occur on the software
What is true about Hyperledger Fabric - ANSWER"Because it is permissioned
- It is impossible to display data to the public
"
"A Large departmental store chain is being pressured by Lawmakers to
- provide evidence that proves that stores clothing is not produced through child
labour.
- Store's clothing is being transferred between atleast 6 different parties in between
creation and placement at the storefront
- The store is considering use of blockchain
-- Descretion in the reading and writing of transactions
- How will you design the solution - ANSWER" "Use a public blockchain
- that supports Assets | Create a new clothing ""Asset""
- When the clothing is transferred to the next party in the process
- the associated blockchain asset be transferred to the next party's blockchain
account
-- with relevant meta data.
- The lawmakers can now view the transactions and transfers at any time
"
A private blockchain such as HyperLedger would be the right choice for which
scenario - ANSWER"An enterprise that needs to build
- scalable, secure, permissioned blockchain application
