IBM Blockchain EXAM QUESTIONS
AND ALL CORRECT ANSWERS 100%
SOLVED AND GUARANTEED
SUCCESS!!
Which of the following blockchain use cases is an example of an Asset Exchange
pattern? - Answer- b. Sharing of assets (voting, dividend notification)
[true/false] You can take a hash function and run it multiple times, so take the output of
running the hash function and use it as the input to the same hash function. This
produces the same results each time. - Answer- . False
Staying with ROT13 as our hash function h, what is the output of running the following
hash chain? h("block" + h("chain")) - Answer- b. oybpxchain
In a typical blockchain implementation, which of the following is an optional part of a
block that contains at least one transaction? - Answer- c. Transaction data
Honest peer 1 thinks the world state is "abc". Honest peer 2 thinks the world state is
"abc". Honest peer 3 thinks the world state is "def". Malicious peer 4 wants everyone to
believe that the world state is "xyz". What is the optimal result of running a consensus
algorithm against this network? - Answer- a. Peers 1, 2 and 3 think the world state is
"abc". Peer 4 is ignored.
What might be considered data for the world state? - Answer- a. Matt's current balance
The ROT13 function takes an input string and converts any letters in it to those that are
13 ahead of it in the alphabet, looping round as appropriate; so the input "blockchain"
becomes "oybpxpunva". ROT13 is not really an appropriate hash function, but which of
these might be considered an advantage of using it as a one-way hash function? -
Answer- a. It is guaranteed to produce the same output for the same input.
Looking at the cryptocurrency market as a whole, which is the biggest differentiator
between cryptocurrency instances? - Answer- a. The commodity being stored
When considering token based blockchains vs. policy based blockchains, which of the
following is true? - Answer- . Policy-based blockchains are permissioned according to
identity
[true/false] Ethereum is a distributed computing platform; it allows smart contracts to be
run globally. Crucially this gives us the concept of "guarantee of future execution" which
, we've never had in computer science before; it ensures that code deployed as smart
contracts *will* be run. - Answer- a. True
With so many existing blockchain implementations, which of the following is (are) key
indicator(s) of needs for blockchain standardization? - Answer- d. All of these
What does the "finality" quality of service provide to blockchain? - Answer- d.
Transactions cannot be backed out
[true/false] In a traditional Blockchain example, Each participant keeps their own
ledger(s) which are updated to represent business transactions as they occur. - Answer-
a. True
Which phrase best describes blockchain? - Answer- a. Shared replicated ledger
Which of the following statement is true about Bitcoin? [New] - Answer- a. Combination
of Ledger and Asset
What does the "immutability" quality of service provide to blockchain? - Answer- An
append-only data structure
Which of the following facts about ledgers is true? - Answer- . Ledgers are logs of
transactions
Endorsement is the process by which the network verifies a transaction. Which
statement is true with blockchain endorsement? - Answer- c. Transactions are provably
endorsed by relevant participants
Which of the following facts about assets is true? - Answer- a. Assets are anything that
is capable of being owned or controlled to produce value
Bitcoin cryptocurrency is a peer-to-peer "electronic cash system" that is not for other
types of assets. What factors make Bitcoin unsuitable as a blockchain for business? -
Answer- d. All of the above
Which of these are the three golden rules of a good blockchain use-case? - Answer- d.
Business problem, business network, need for trust
a. Business problem, smaller network, allows for scaling
What are the traditional food industry constructs today that limit transparency? -
Answer- b. Exchange of information takes place between a pair of partners; to get
information from a distant partner may require intermediaries, time, resources
d. Because everyone maintains their own record of transactions, differences take time
and resources to reconcile
AND ALL CORRECT ANSWERS 100%
SOLVED AND GUARANTEED
SUCCESS!!
Which of the following blockchain use cases is an example of an Asset Exchange
pattern? - Answer- b. Sharing of assets (voting, dividend notification)
[true/false] You can take a hash function and run it multiple times, so take the output of
running the hash function and use it as the input to the same hash function. This
produces the same results each time. - Answer- . False
Staying with ROT13 as our hash function h, what is the output of running the following
hash chain? h("block" + h("chain")) - Answer- b. oybpxchain
In a typical blockchain implementation, which of the following is an optional part of a
block that contains at least one transaction? - Answer- c. Transaction data
Honest peer 1 thinks the world state is "abc". Honest peer 2 thinks the world state is
"abc". Honest peer 3 thinks the world state is "def". Malicious peer 4 wants everyone to
believe that the world state is "xyz". What is the optimal result of running a consensus
algorithm against this network? - Answer- a. Peers 1, 2 and 3 think the world state is
"abc". Peer 4 is ignored.
What might be considered data for the world state? - Answer- a. Matt's current balance
The ROT13 function takes an input string and converts any letters in it to those that are
13 ahead of it in the alphabet, looping round as appropriate; so the input "blockchain"
becomes "oybpxpunva". ROT13 is not really an appropriate hash function, but which of
these might be considered an advantage of using it as a one-way hash function? -
Answer- a. It is guaranteed to produce the same output for the same input.
Looking at the cryptocurrency market as a whole, which is the biggest differentiator
between cryptocurrency instances? - Answer- a. The commodity being stored
When considering token based blockchains vs. policy based blockchains, which of the
following is true? - Answer- . Policy-based blockchains are permissioned according to
identity
[true/false] Ethereum is a distributed computing platform; it allows smart contracts to be
run globally. Crucially this gives us the concept of "guarantee of future execution" which
, we've never had in computer science before; it ensures that code deployed as smart
contracts *will* be run. - Answer- a. True
With so many existing blockchain implementations, which of the following is (are) key
indicator(s) of needs for blockchain standardization? - Answer- d. All of these
What does the "finality" quality of service provide to blockchain? - Answer- d.
Transactions cannot be backed out
[true/false] In a traditional Blockchain example, Each participant keeps their own
ledger(s) which are updated to represent business transactions as they occur. - Answer-
a. True
Which phrase best describes blockchain? - Answer- a. Shared replicated ledger
Which of the following statement is true about Bitcoin? [New] - Answer- a. Combination
of Ledger and Asset
What does the "immutability" quality of service provide to blockchain? - Answer- An
append-only data structure
Which of the following facts about ledgers is true? - Answer- . Ledgers are logs of
transactions
Endorsement is the process by which the network verifies a transaction. Which
statement is true with blockchain endorsement? - Answer- c. Transactions are provably
endorsed by relevant participants
Which of the following facts about assets is true? - Answer- a. Assets are anything that
is capable of being owned or controlled to produce value
Bitcoin cryptocurrency is a peer-to-peer "electronic cash system" that is not for other
types of assets. What factors make Bitcoin unsuitable as a blockchain for business? -
Answer- d. All of the above
Which of these are the three golden rules of a good blockchain use-case? - Answer- d.
Business problem, business network, need for trust
a. Business problem, smaller network, allows for scaling
What are the traditional food industry constructs today that limit transparency? -
Answer- b. Exchange of information takes place between a pair of partners; to get
information from a distant partner may require intermediaries, time, resources
d. Because everyone maintains their own record of transactions, differences take time
and resources to reconcile
