IBM watsonx Mainframe Modernization Architect Associate (C1000-187) Certification Sample Questions

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IBM C1000-187 Sample Questions:

01. An architect maps the topology and notes that the scanner, the bridge, and the models all sit off the mainframe. The platform owner asks whether the validate phase will ask anything of the z/OS team, whose change queue runs months long.

What should the architect tell the platform owner?

a) It will: the code model is installed on z/OS for the validate phase, so that the comparison runs beside the application.

b) It will: the validation client carries a Java development kit prerequisite for z/OS, so that request belongs in the queue now.

c) It will: the bridge is moved onto z/OS for the phase, so that it can reach the source libraries.

d) It will not, because validation is driven from the editor extension the developers already have, and the work is served by the same cloud service the transformation used.

02. Under schedule pressure, a team closes a divergence by changing the refactored COBOL rather than the Java.

What has that done to the program?

a) Moved the reference, so earlier results describe a version that no longer exists

b) Nothing of consequence, since the two implementations now agree

c) Improved matters, since the COBOL is the older of the two

d) Invalidated the transformation, which has to be generated again from scratch

03. Every generated test passed for a transformed service, and a functional defect appeared in production three weeks later.

Which explanation is consistent with what the comparison actually checked?

a) Comparison of this kind does not detect behavioral differences

b) The Java was optimized after the comparison completed

c) The comparison was run against the wrong version of the COBOL

d) The failing path was not among those exercised

04. Two teams disagree about what an optimization exercise delivered. One expected a shorter elapsed time in production; the other expected a set of code changes to review.

Which expectation matches the capability?

a) The set of code changes

b) Both, because the tool measures the improvement after applying each fix

c) The shorter elapsed time, because the tool applies its own recommendations

d) Neither, because the capability reports only which modules are the largest

05. Developers report that transformation works for every service in an application except one, which fails each time it is requested. The client, the network path to the assistant service, and the developers' credentials are all shared with the services that succeed.

What does the pattern of failure tell the architect about where to look?

a) The client installation should be rebuilt, since an intermittent extension fault can affect one workflow and leave others intact

b) The shared client and service path are exonerated by the services that succeed, so the investigation belongs with that one service's extracted definition and the analysis behind it

c) The equivalence tests for that service should be generated first, since they will show why the transformation cannot complete

d) The foundation model deployment option should be reviewed, since one service may be more than the current host can serve

06. After a rebuild of the discovery environment, the Refactoring Assistant can reach the discovery product over the network, but every attempt to sign in from it is rejected. The Linux host is healthy, the assistant service in cloud is reachable, and developers can still work against that service from Visual Studio Code.

What should the architect check first?

a) That the foundation model deployment option was not changed during the rebuild

b) That the developers' editor extension is pointed at the correct assistant service instance

c) That the Refactoring Assistant is still registered as a valid client of the discovery product's authentication server, which is what it signs in through

d) That a separate identity provider has been configured on the Linux host for the Refactoring Assistant

07. Two systems, a broker portal and an internal claims desk, each need the same customer eligibility rules, which today sit inside one large COBOL program and are partly copied by both callers. A team lead asks what refactoring that program changes for the two of them.

What does it make possible?

a) A ranked list of the inefficiencies in the eligibility logic, so that the shared path can be made faster first.

b) One extracted business service that both can address.

c) An explanation of the eligibility rules that each team can hold as documentation.

d) A separate copy of the eligibility logic generated for each caller, so that neither can be disturbed by a change the other one needs.

08. The blueprint shows that a proposed business service takes in a program which shares a working data area with a second program outside the service boundary. The team is keen to start refactoring.

What does the evidence call for?

a) Adjusting the proposed boundary so the shared data relationship is resolved before refactoring starts

b) Rescanning the estate, because a shared data area between two programs means the analysis was incomplete

c) Refactoring as planned, because the extension separates a shared data area automatically as it modularizes

d) Deferring the question to transformation, where the boundary of the Java service is finally decided

09. Code Explanation returns a description of a payment module that contradicts the specification the business has always believed describes it. A developer asks which of the two to trust.

What should the architect do with the difference?

a) Discard the explanation, because the written specification remains the authoritative description of the module

b) Treat the explanation as a description of what the code does today and take the difference back to the business owners

c) Log it as a transformation defect, because the generated Java would otherwise inherit the discrepancy

d) Request the explanation again until it agrees with the specification, since the first result was a poor generation

10. Before the first discovery scan is run, an architect is listing the pieces that already have to be in place. One of them manages the COBOL repositories that each discovery project is linked to.

Which component is that?

a) The refactoring bridge, which connects the discovery product to the assistant service

b) The metadata store, which holds the analysis results the assistant service later draws on

c) The editor extension, which is the developer's interface to the assistant service

d) COBOL source control management, which holds the repositories the discovery projects are linked to

Answers:

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

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