BTA CBSA Certification Sample Questions

01. Three freight carriers each maintain their own shipment database. Most of their operating cost in the shared lane comes from staff who compare the three records every month and resolve the disagreements. Which statement best describes what a shared ledger would change for them?
a) It guarantees that the data entered by each carrier is accurate
b) It replaces the monthly comparison with one record all three write to and read from
c) It lowers the cost of holding each individual shipment record by storing that record more efficiently
d) It removes any need for each carrier to keep and maintain an internal operational database of its own records

02. A team proposes making its contract upgradeable so that defects found after launch can be fixed, with a single administrator key authorized to install a new implementation. Which consequence must be presented to the sponsor?
a) The contract will no longer be able to hold funds, because an upgradeable implementation cannot be trusted with a balance
b) Users holding balances will need to migrate them after each upgrade
c) Whoever holds that key can replace the contract's behavior entirely at any time
d) Every upgrade will require the agreement of the network's validators before it can take effect

03. Eight distributors share one permissioned network. Any two of them negotiate prices that the other six must not see, but all eight must share one product catalog and one recall history. Which structure serves this best?
a) Separate bilateral networks for each trading pair, with the catalog replicated into every one of them
b) One network for shared catalog data, with private channels per trading pair
c) One network holding every record, with reading restricted through the client application's permissions
d) One network for the catalog and a second network shared by all eight for every price negotiation

04. A team accustomed to web releases proposes its usual acceptance criteria for a contract deployment: functional tests pass, no known high-severity defects, and a rollback plan in place. Which criterion does not transfer?
a) The rollback plan, because a deployed contract cannot be withdrawn
b) The functional test criterion, since contract behavior can only be confirmed on the production network
c) The defect severity criterion, since every contract defect is high-severity where funds are held
d) All three criteria transfer unchanged, since a contract deployment is a release like any other

05. Two banks currently exchange trade instructions during the day and settle the resulting net position through a central counterparty on the following business day. Which change does a shared ledger with on-ledger cash tokens introduce to that arrangement?
a) The central counterparty is replaced by an automated netting engine that runs on the ledger overnight
b) Settlement risk shifts entirely to the receiving bank
c) Instructions are exchanged more quickly, because messages and confirmations no longer pass through an intermediary
d) The instruction and the transfer of value become the same event

06. A treasury team uses a wallet that derives a fresh address for each incoming payment from a single recovery phrase. They plan to give each of four analysts one derived address to work with. Which security consequence should be raised?
a) Anyone holding the recovery phrase controls every address the wallet will ever derive
b) The four analysts will not be able to receive payments at the same time
c) An analyst who exposes one derived address can be used to reconstruct the recovery phrase
d) Each derived address inherits the transaction history of the addresses derived before it

07. On a stake-based network, a set of validators whose bonds were withdrawn long ago still hold the keys they used at that time. They can therefore sign an alternative history branching from a point far in the past. What limits this attack in practice?
a) The alternative history would take longer to produce than the genuine chain took to grow
b) Nodes reject blocks whose timestamps precede the current head
c) The bonds of the validators who sign the alternative history are destroyed with the protocol's slashing rules
d) A node refuses any history that conflicts with a recent state it already trusts

08. A team clones an existing network's configuration to create their own private network and leaves the network identifier unchanged. Which problem does this create?
a) Wallet software will display balances from the original network alongside the new one
b) Nodes from the two networks will connect to one another and attempt to merge their chains
c) A transaction signed for one network is valid on the other
d) The new network will be unable to produce a genesis block distinct from the original one

09. An auditor reviewed a contract's source code and reported no findings. The team then deployed the contract to the production network. What must a user do to establish that the audited code is the code now running?
a) Confirm that the deployment transaction was signed by the same team that commissioned the audit of the source
b) Compile the reviewed source and compare the result against the bytecode at the deployed address
c) Read the deployed contract's storage and confirm that it matches the values the audit report describes
d) Check that the audit report names the contract's deployed address

10. A payout function calls an external token contract to move funds to a recipient, then marks the payout as settled. Audit logs later show payouts marked settled for recipients who received nothing. What is the most likely cause?
a) The external call reported failure through a return value the payout function never inspected
b) The external call ran out of gas partway through and left the recipient's balance entirely unchanged
c) The payout function marked settlement before the external call was made
d) The recipients had not registered with the token contract before the payout was first attempted