ISACA Blockchain Fundamentals Certification Sample Questions

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ISACA Blockchain Fundamentals Sample Questions:

01. Five insurers run a permissioned ledger for shared claims data, with one validator node each. To save cost, two of the insurers ask the largest member to host and operate their nodes on their behalf, so that member would run three of the five validators.

Which risk does this arrangement MOST directly create?

a) Block validation stops entirely, because the mechanism requires that each validator run at a separate site

b) Claims data becomes readable by the largest member, which it could not see before

c) The ledger's hash links weaken, since fewer independent sites now store the chain

d) One member can approve blocks by itself, which removes the protection that spread control gave

02. A university plans to record graduates' personal details on a consortium ledger shared with employers. Its architect proposes encrypting each record before it is written, so that only authorized employers can read it, and argues that this resolves the data-protection right to erasure.

Which assessment of the proposal is accurate?

a) Encryption resolves the conflict, provided the employers each hold a decryption key

b) Encrypted entries remain on every node, so the conflict persists

c) Encryption satisfies the erasure right because unreadable data counts as deleted

d) The proposal works only if the ledger is switched to a permissioned network

03. Two hospitals reconcile a large imaging archive each night. An architect proposes that, instead of exchanging full copies to compare, each side computes a digest of its archive and exchanges only the digests. A reviewer asks what the change actually gains.

Which answer BEST captures the gain?

a) A small value verifies a large archive without exposing its content

b) A small value shows which images differ, so only those need to be resent

c) A small value restores either archive if one side's copy is later lost

d) A small value proves each archive was accurate when the images were captured

04. A supplier joining a consortium ledger tells its board that, because the ledger is hash-linked and cryptographically secured, competitors on the same network will be unable to read its pricing records. The board asks an analyst to evaluate the claim before the supplier commits to joining.

Which evaluation is MOST accurate?

a) Hash linking protects integrity, so competitors can see that records exist but not their content

b) Hash linking scrambles and hides records, leaving a competitor with nothing until a member shows the matching key

c) Hash linking protects integrity, every member holds the readable ledger and confidentiality needs a separate control

d) Hash linking replaces encryption on a consortium ledger, since only approved members may join

05. One validating node in a public-sector land registry consortium is compromised and begins proposing blocks that contain transfers never signed by the owners. The other validating nodes reject each of those blocks. What action is now required of the consortium?

a) Leave the node in place, since the other validators are rejecting its blocks

b) Roll the ledger back to the last block before the node was compromised

c) Re-run consensus on every block that the compromised node proposed earlier

d) Withdraw that node's validator status without repairing the ledger

06. An energy-trading consortium's ledger code has been running for three months when a member finds a logic error that overpays some sellers. The code holds funds and is still processing trades. The consortium never agreed how the code could be replaced.

Which statement BEST describes the consortium's position?

a) The running code can be patched by the member who found the error, provided the other members are notified afterward

b) The running code can be corrected by its node operators, who hold the copies on which it executes

c) The running code cannot be edited in place, so remediation means agreeing a replacement and moving activity to it

d) The running code will stop executing once the members record the error on the ledger, releasing its held funds and pending trades

07. Six agricultural cooperatives form a consortium ledger to record grain deliveries. Every validator node will be operated by a named cooperative under a signed membership agreement, and no outside node may join. One cooperative proposes Proof of Work so that the ledger is as secure as a public network.

Which assessment is MOST accurate?

a) Proof of Work guards against anonymous participants, which this membership model already excludes

b) Proof of Work is appropriate, because identified validators still need to compete for the block reward

c) Proof of Work is required, because it is the only mechanism that makes a block's hash tamper-evident

d) Proof of Work and consensus itself are both unnecessary among named members

08. A property developer on a real-estate settlement ledger denies having submitted a transaction that released a deposit to a contractor. The transaction carries a signature that verifies against the developer's public key, and the ledger shows that the network accepted it in an earlier block.

Which conclusion is BEST supported by that evidence?

a) The network accepted it by consensus, so the developer is bound whatever key produced the signature

b) The signature proves only that the transaction was not altered, so the developer's denial stands

c) The denial must stand because a signature cannot identify a person

d) The key holder authorized it, unless the developer can show the key was compromised

09. Four banks plan a shared settlement ledger. Their regulator must be able to read every entry as soon as it is written, but the banks want only member banks to submit entries and to validate blocks, and the regulator has said it does not want to run consensus.

Which access design BEST meets all of these requirements?

a) Grant the regulator read-only access, with writing and validation kept to member banks

b) Send the regulator an exported copy after each block is accepted

c) Give the regulator a validating node of its own, so that it reads every entry as soon as it is accepted

d) Make the ledger public so that the regulator and the public can read it, with member banks validating

10. A city council's innovation office has received four blockchain proposals and can fund only three. For each one it asks who writes the record, who must trust it, and whether an acceptable party already keeps it. Which proposal should NOT proceed?

a) A recycled-material batch record passed between collectors, sorters and reprocessors

b) A register of licensed taxi drivers that operators and passengers already check with the licensing office

c) A land-transfer record that buyers, sellers, lenders and surveyors each need to verify without relying on one another

d) A charity grants record shared by the council, donors and audited recipient organizations that do not trust each other

Answers:

Question: 01 Answer: d	Question: 02 Answer: b	Question: 03 Answer: a	Question: 04 Answer: c	Question: 05 Answer: d
Question: 06 Answer: c	Question: 07 Answer: a	Question: 08 Answer: d	Question: 09 Answer: a	Question: 10 Answer: b

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