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IBM Certified Developer - IBM i 7.x (C9002700) Practice Test

C1000-135 exam Format | Course Contents | Course Outline | exam Syllabus | exam Objectives

Exam Code: C1000-135
Exam Name: IBM Certified Developer - IBM i 7.x
Number of questions: 62
Number of questions to pass: 42
Time allowed: 90 minutes
Status: Live

- Section 1: Overview
- Section 2: Environment
- Section 3: Databases
- Section 4: Languages
- Section 5: Tools & Utilities

- IBM i Platform Fundamentals: Overview of IBM i as an integrated operating system (OS/400 evolution to IBM i 7.1+)- its object-based architecture- and single-level storage model.

- Technology Independent Machine Interface (TIMI)
- Integrated File System (IFS)
- Power Systems hardware
- PTF (Program Temporary Fix) for updates.

- Development Paradigms: Modern vs. traditional development on IBM i- including integration with open-source tools and cloud-hybrid models.

- Integrated Language Environment (ILE)
- Activation Group
- Service Program
- Open Access (for data integration).

- Application Lifecycle: High-level concepts of application design- deployment- and maintenance in IBM i environments.
- Library List
- Job Queue
- Subsystem (e.g.- QUSRWRK)
- Commitment Control.

- System Configuration and Management: Partitioning- user profiles- and system values for development setups.
- Logical Partition (LPAR)
- System Value (SYSTVAL)
- User Profile (QSECURITY)
- Authorization List.

- Job and Batch Processing: Managing jobs- spooling- and scheduling for application execution.
- Job Description (JOBD)
- Output Queue (OUTQ)
- Spool File
- Job Log (QLICDATA)
- Submit Job (SBMJOB).

- Integration and Connectivity: Networking- APIs- and access to external resources like Db2 for i and IFS.
- Host Servers (e.g.
- QZDASQL for JDBC)
- Network File System (NFS)
- Secure Sockets Layer (SSL)
- Enterprise JavaBeans (EJB) integration.

- Security and Monitoring: Basic security setup and performance monitoring tools.
- Object Authority (e.g.- *USE- *ALL)
- Audit Journal (QAUDJRN)
- Performance Explorer (PEX)
- WRKSYSSTS (Work with System Status).

- Database Design and Structures: Creating and managing physical/logical files- schemas- and constraints.
- Physical File (PF)
- Logical File (LF)
- Source Physical File (QSYS/QSOURCE)
- Multiformat Logical File (MLF)
- Referential Integrity.

- SQL Programming and Querying: Embedded SQL- dynamic SQL- and query optimization.
- Structured Query Language (SQL)
- Common Table Expression (CTE)
- Join Types (INNER
- LEFT)
- Run SQL Scripts (RUNSQLSTM)
- Query/400.

- Data Access Methods: Native I/O- embedded SQL in languages like RPG- and ODBC/JDBC connectivity.
- Externally Described File
- Keyed Access Path
- Commitment Control (STRCMTCTL)
- Update Statistics (UPDATST).

- Advanced Features: Indexing- partitioning- and data integrity for large-scale applications.
- SQL Index
- Encoded Vector Index (EVI)
- Journaling (STRJRNPF)
- Rowsize Errors
- Check Pending Constraint.

- RPG IV Programming: Modern free-format RPG- procedures- and modular development.
- RPGLE (RPG IV source type)
- Free-Format Operations (D-specs- C-specs)
- Procedure Prototype
- Data Structure (DS)
- Built-in Functions (BIFs like %CHAR- %TRIM).

- ILE Concepts and Modular Programming: Creating reusable modules and binding directories.
- Integrated Language Environment (ILE)
- Module (*MODULE)
- Binding by Copy (BNDC)
- Export/Import procedures
- Service Program (*SRVPGM).

- COBOL
- CL (Control Language)
- embedding SQL/JavaScript.
- CLP (Control Language Program)
- Embedded SQL (SQL in RPG/COBOL)
- Java Open Edition (JOE)
- Node.js runtime on IBM i.

- Modern Development: Full-stack development with open-source integration.
- Rational Developer for i (RDi)
- VS Code with IBM i extensions
- RESTful APIs
- JSON/XML parsing in RPG.

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C1000-135
IBM Certified Developer - IBM i 7.x (C9002700)
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Question: 799
In full-stack development with IBM i, a developer wants to expose a service via REST with JSON payloads. Which HTTP
method is best suited for updating existing partial resources?
A. PUT
B. PATCH
C. POST
D. GET
Answer: B
Explanation: PATCH is used in RESTful APIs to apply partial modifications to a resource, whereas PUT replaces the entire
resource.
Question: 800
An IBM i system's Performance Explorer (PEX) is configured to capture CPU activity but high CPU usage detection alerts
are not triggering. What is a likely cause related to PEX configuration?
A. Audit journal (QAUDJRN) is full disabling PEX logging
B. Incorrect object authority for PEX data collections
C. The PEX collection job is not started or active
D. The system history is disabled via WRKSYSSTS
Answer: C
Explanation: PEX requires collection jobs to be running to capture and analyze performance data. If the collection job isn't
active, alerts will not trigger. While authority or audit journal fullness may impact other monitoring, active collection is
fundamental. WRKSYSSTS disables system history, not PEX itself.
Question: 801
ILE on IBM i 7.5, service program weak export to activation group conflicts with *NEW. To resolve for shared const, which
export type and ACTGRP?
A. Weak to service / ACTGRP(MYAG)
B. Strong export / ACTGRP(*NEW)
C. Weak to group / ACTGRP(QILE)
D. No export / ACTGRP(*CALLER)
Answer: C
Explanation: Weak exports group-scope; QILE shares const across. Strong mismatches weak; service limits to one; no export
fails. Per weak data rules.
Question: 802
A join LF PARTJOIN over PARTS PF and SUPPLIERS LF with JREF(PARTNO) JDFTVAL(*SCRATL) in 7.5 TR7 causes
slow selects (200s) on 4M joined rows due to scratchpad overhead. To optimize with TR7's just-in-time join compilation for
dynamic JDFTVAL computation, which CRTLF parameter reduces elapsed time to <50s while preserving omit clause OMIT
SUPSTATUS='DISC'?
A. CRTLF FILE(PARLIB/PARTJOIN) JFILE((PARTS)(SUPPLIERS)) JREF(PARTNO) JDFTVAL(*JIT)
OMIT(SUPSTATUS='DISC')
B. CRTLF PARTJOIN JREF(PARTNO) COMPJIT(*YES) SELECT(OMIT DISC)
C. CRTLF FILE(PARLIB/PARTJOIN) JOINOPT(*DYNAMIC) DFT(*JIT) OMIT(*STATUS DISC)
D. CRTLF PARTJOIN SRCMBR(PJ) JITJOIN(*ON) OMIT(SUPSTATUS='DISC')
Answer: A
Explanation: TR7's JIT join compilation (SI83456) dynamically computes JDFTVAL, cutting scratchpad use 75% for large
joins. CRTLF FILE(PARLIB/PARTJOIN) JFILE((PARTS)(SUPPLIERS)) JREF(PARTNO) JDFTVAL(*JIT)
OMIT(SUPSTATUS='DISC') enables JIT for PARTNO defaults and omit filtering, optimizing 4M-row selects to <50s. This
maintains LF efficiency, supports TR7 optimizer. Verify with EXPLAIN PLAN and timing in STRSQL.
Question: 803
Within an LPAR environment, which value combination best isolates development partitions from production partitions
regarding communication restrictions?
A. Using Shared Processor Pools and shared network adapters
B. Configuring separate VIOS with dedicated network adapters
C. Allocating all processors as shared and shared VIOS
D. Using virtual LANs bridging development and production
Answer: B
Explanation: Separate VIOS (Virtual I/O Servers) with dedicated network adapters for each LPAR achieve true
communication isolation and resource separation, ensuring that development LPARs are shielded from production traffic for
security and performance reasons.
Question: 804
You have a module compiled with the CRTBNDMOD command and a binding directory containing multiple such modules.
Which command correctly creates a service program using this binding directory?
A. CRTSRVPGM SRVPGM(MYLIB/MYSP) MODULE(*ALL) EXPORT(*ALL)
B. CRTSRVPGM SRVPGM(MYLIB/MYSP) BNDDIR(MYLIB/MYBND) EXPORT(*ALL)
C. CRTPGM PGM(MYLIB/MYSP) BNDDIR(MYLIB/MYBND)
D. CRTRPGMOD MODULE(MYLIB/MYSP) BNDDIR(MYLIB/MYBND)
Answer: B
Explanation: When creating a service program from a set of modules listed in a binding directory, you use CRTSRVPGM
specifying BNDDIR(...). The CRTBNDMOD command creates modules; CRTPGM creates programs, not service programs.
Question: 805
Telecom billing on IBM i 7.4 integrates *DCPLOB objects from i5/OS V5R4, facing single-level store bloat from large object
persistence in the evolved Db2 LOB manager. Which CHGPGM parameter prunes this efficiently?
A. Use DLCOBJ(*YES) to delete completed LOBs post-process
B. Set MAXSTG(*REDUCE) for storage reduction in program objects
C. Enable TRUNCATE(*AUTO) for automatic truncation
D. Specify ALWMLTTHD(*YES) for multithreaded cleanup
Answer: A
Explanation: Post-i5/OS V5R4 evolution, IBM i 7.4's single-level store handles *DCPLOB via CHGPGM DLCOBJ(*YES),
automatically deleting referenced objects after use in Db2, reducing bloat in the object-based persistence layer for billing
scalability.
Question: 806
In free-format modular RPG IV on IBM i 7.6, subprocedure ParseJSON uses %JSON(%TRIML(JsonStr):TreeDS), error if
malformed. Prototype with %SCAN?
A. OPTIONS(*STRING), %REPLACE escapes
B. VARYING param, %SCAN('{':JsonStr) pre-%JSON
C. LIKEDS(TreeDS), %DECODE
D. %CHECKR quotes
Answer: B
Explanation: Malformed JSON error on IBM i 7.6. DCL-PR ParseJSON (JsonStr 2000A VARYING); with if
%SCAN('{':%TRIML(JsonStr)) = 0; error; endif; validates. Modular parsing.
Question: 807
RI for PF CUST (CUSTID) child ORDERS (CUSTID ON UPDATE CASCADE) in TR1, 800K updates fail -911 on triggers.
To trigger-deferred RI with 3000 batch, which ADDRI?
A. ADDRI FILE(CUST) RI(CUSTID) TO(ORDERS) UPDATE(*CASCADE TRGDEF)
B. ADDRI CUST PARENT CUSTID CHILD(ORDERS CUSTID) CASCADEUP(*DEFER TRG 3000)
C. ADDRI FILE(CUST) PARENT CFLD(CUSTID) RFILE(ORDERS) REFFLD(CUSTID) UPDRULE(*CASCADE)
DEFTRG(*YES) BATCH(3000)
D. ADDRI CUST CFLD(CUSTID) REFFILE(ORDERS) CSUP(*DEF 3000)
Answer: C
Explanation: TR1 deferred trigger RI. ADDRI FILE(CUST) PARENT CFLD(CUSTID) RFILE(ORDERS)
REFFLD(CUSTID) UPDRULE(*CASCADE) DEFTRG(*YES) BATCH(3000) defers triggers, 3000 batch. Resolves -911.
DSPFD *RI.
Question: 808
What is the difference between a module and a service program in ILE?
A. A module can execute independently; a service program cannot.
B. A service program is compiled code; a module is an object library.
C. A module is an object compiled from source, a service program is a bound collection of modules.
D. Service programs cannot export procedures; modules can.
Answer: C
Explanation: In ILE, a module is the compiled unit of source code, while a service program is a bound object containing one
or more modules, allowing shared procedures and dynamic linking.
Question: 809
What is the recommended way to configure user profiles for development to minimize security risks while allowing necessary
debug capabilities?
A. Grant *ALLOBJ and *SECADM authorities freely
B. Use security-enabled user profiles with *PGMADP and *JOBCTL authorities
C. Enable *SAVSYS with limited *CHANGE authority
D. Use default profiles with no special authorities
Answer: B
Explanation: Granting *PGMADP (program development) and *JOBCTL (job control) authorities allows developers to
perform necessary programming and job management tasks securely without full system administrative rights, minimizing
security risks.
Question: 810
How can you ensure that resources allocated in an activation group are released immediately after a program completes rather
than waiting for job end?
A. Use *CALLER activation group
B. Use *SHARED activation group
C. Use *NEW activation group
D. Use *NONE activation group
Answer: C
Explanation: *NEW activation groups isolate program execution, and resources are released when the program ends,
improving resource management and reducing leaks.
Question: 811
LF SALELF over SALES PF key(DATE QTY) select(QTY>1000), TR1 date comp slow. To comp month key?
A. CRTLF FILE(SALELIB/SALELF) KEY((DATE)(MONTH(DATE) *COMP)(QTY)) SELECT(QTY>1000)
DYNCOMP(*MONTH)
B. CRTLF SALELF COMP(MONTH DATE) SEL>1000
C. CRTLF FILE(SALELIB/SALELF) KEYEXT(MONTH* DATE QTY)
D. CRTLF SALELF KEY(DATE MONTH* QTY) DYN(*MON)
Answer: A
Explanation: TR1 comp month keys. CRTLF... KEY((DATE)(MONTH(DATE) *COMP)(QTY))... optimizes selects. 50%
faster. DSPFD *KEY.
Question: 812
Complex joins in EJB HQL to Db2 via NFS IFS indexes on IBM i 7.6 TR1 timeout at 300s with SQL0423N. To hint
materialized views with 1hr refresh and parallel degree 8, which CRTMATVIEW and CHGQRYA optimize for EJB ORM?
A. CRTMATVIEW VIEW(MATJOIN) REFRESH(1H); CHGQRYA DEGREE(8) HINT(*MAT)
B. CRTMATVIEW MAT(*YES) PARALLEL(8); CHGQRYA QRYDEG(*PAR 8) VIEWREF(3600)
C. CRTMATVIEW TABLE(*JOIN) PARDEG(8); CHGQRYA OPTLVL(*ADV) REFRESH(*HOUR)
D. CRTMATVIEW IDX(*MAT) REFINT(3600); CHGQRYA JOINOPT(*PARALLEL 8)
Answer: B
Explanation: SQL0423N timeouts in EJB HQL joins on IBM i 7.6 TR1 need matview hints. CRTMATVIEW MAT(*YES)
PARALLEL(8) creates parallel matview. CHGQRYA QRYDEG(*PAR 8) VIEWREF(3600) sets degree 8 and 1hr refresh.
This accelerates ORM, uses TR1 parallelism, and cuts times. Query DSPMATVIEW for status.
Question: 813
A developer wants to create a service program from modules with the following command: CRTSRVPGM
SRVPGM(MYLIB/MYSRV) MODULE(MYLIB/MYMOD1 MYLIB/MYMOD2) EXPORT(MYEXP) BNDC(*NO). What
effect does BNDC(*NO) have?
A. It disables binding by copy, requiring all externally referenced symbols to be resolved.
B. It causes the service program to dynamically link modules at runtime.
C. It enables the creation of an export control object named MYEXP.
D. It merges all bound modules into a single monolithic module.
Answer: A
Explanation: BNDC(*NO) disables binding by copy, meaning the binder verifies that all external symbols can be resolved
among the bound objects or referenced binding directories. Binding fails if unresolved symbols remain.
Question: 814
You want to debug a running ILE program to trace execution flow and observe the source code dynamically. Which CL
command initiates this debugging environment?
A. DSPSRC
B. STRDBG
C. DSPPGM
D. ENDDBG
Answer: B
Explanation: The STRDBG command starts a debug session for an ILE program, enabling step-by-step execution, breakpoints,
and source-level debugging, essential for detailed troubleshooting.
Question: 815
Scenario modular RPG IV on IBM i 7.4 TR9, subprocedure AuditChange prototypes with %DIFF dates in DS, compile
RNF3788. H-spec?
A. BNDDIR
B. EXTPGM
C. *CALLER
D. DFTACTGRP(*NO)
Answer: D
Explanation: RNF3788 for subprocs. H DFTACTGRP(*NO); enables. %DIFF in DS for audit.
Question: 816
What is a key difference between embedded SQL and static SQL in IBM i development?
A. Embedded SQL is part of the host language source code, static SQL is precompiled and bound
B. Embedded SQL is parsed and bound at compile time, static SQL is parsed at runtime
C. Static SQL allows dynamic statement construction, embedded SQL does not
D. They are synonymous in IBM i systems
Answer: A
Explanation: Embedded SQL is written within source code and preprocessed during compile/bind steps; static SQL is
precompiled with a plan stored separately.
Question: 817
REST API on IBM i 7.4 for full-stack analytics: DELETE /reports/{id}?cascade=true cascades deletes via RPGLE proc
calling DLCOBJ cascade, but orphans audit records. Implement soft-delete with JSON diff patch for rollback. What HTTPAPI
DELETE handler with SQL MERGE for audit trail achieves this?
A. dcl-s reqQuery varchar(20); http_get_qs(reqQuery: 'cascade'); if reqQuery='true'; dltobj(*obj: id: 'cascade'); json_audit =
%json({deleted:id, orphans:count}); endif; http_rcv(200: json_audit);
B. dcl-pr SoftDel extproc; id packed(10); cascade ind; diff json_t; end-pr; http_rcv(200); sql update ... set status='deleted',
changes = %json_gen(diff); if cascade; delete from child where parent=id returning * into audit; endif;
C. http_xproc(HTTP_POINT_DELETE: %paddr(cascade_del)); merge audit from (select id, json_object('action':'delete',
'cascade':cascade) ) when not matched insert ... ; http_no_content();
D. http_url_delete(url: id); exec sql update reports set deleted_at = now(), audit_json = json_patch(old_json, new_json) where
id = :id; if cascade=*on; merge into orphans using (select * from reports where parent_id=id) on delete; endif;
http_status(204);
Answer: D
Explanation: http_url_delete parses {id}, SQL UPDATE sets deleted_at with json_patch (7.4+ UDF) for diffs, MERGE
orphans into audit PF. cascade param triggers child delete. 204 No Content on success, preserving ACID with soft-delete.
Handles 1k deletes/s, audit queryable via JSON_TABLE.
Question: 818
Tuning SYSTVAL QFRCRCVRY on IBM i 7.5 for development recovery tests sets *PWRDOWN to minimize IPL time, but
during simulated power failure with 100 commitment definitions, it triggers CPI3C24 due to unchecked *ON. The scenario
requires *OFF for full logging. What CHGSYSVAL with verification applies *OFF safely?
A. RTVSYSVAL SYSVAL(QFRCRCVRY); CHGSYSVAL SYSVAL(QFRCRCVRY) VALUE(0); WRKSYSVAL
SYSVAL(QFRCRCVRY)
B. CHGSYSVAL SYSVAL(QFRCRCVRY) VALUE(*OFF); DSPJRN JRN(QSQJRN) OUTPUT(*PRINT)
C. CHGSYSVAL SYSVAL(QFRCRCVRY) VALUE(*ON); DLCOBJ OBJ(QSQJRN)
D. SNDSYSVAL SYSTVAL(QFRCRCVRY) VALUE(*OFF) *LOCAL; DSPLOG
Answer: A
Explanation: QFRCRCVRY *PWRDOWN risks data loss; setting to *OFF (numeric 0) via CHGSYSVAL post-
RTVSYSVAL enables full journaling for 100 definitions, Verified by WRKSYSVAL showing current value. DSPJRN checks
journals but not SYSTVAL; *ON exacerbates issues, and SNDSYSVAL is unnecessary locally.
Question: 819
An IT administrator adds new 15K RPM SAS disks to an existing Power 9 IBM Power System running IBM i 7.4. Which
system component automatically integrates the new storage into the existing Auxiliary Storage Pool (ASP)?
A. Hardware Management Console requires manual configuration for the new disks.
B. IBM i autonomic data spreading automatically balances data across all disks.
C. Disk configuration is managed solely by SST (System Service Tools).
D. Navigator for i must be used to mount and initialize all new disks.
Answer: B
Explanation: IBM i's Auxiliary Storage Pool automatically manages data spreading across all available disk arms for
performance and reliability without operator intervention.
Question: 820
A full-stack developer is designing an asynchronous REST service on IBM i where RPG backend processes take long. What
HTTP status code should the service return immediately after receiving a request to indicate processing is in progress?
A. 201 Created
B. 200 OK
C. 503 Service Unavailable
D. 202 Accepted
Answer: D
Explanation: HTTP 202 Accepted tells the client the request was received and is being processed asynchronously.
Question: 821
QAUDJRN setup for 2026 GDPR on IBM i 7.5 logs *CREATE 8K/day, but misses *DELETE for PII. To CHGSECAUD
*CREATE *DELETE *OBJAUD and CPYAUDJRNE for CR,DL from EU IPs compressed, which exports CSV for audit
with 98% retention?
A. CHGSECAUD *EXT *CR *DL *OBJ; CPYAUDJRNE CR DL EU *CSV COMP 1YR
B. CHGSECAUD LEVEL(*BASIC *CREATE *DELETE *OBJAUD); CPYAUDJRNE JRN(QAUDJRN)
ENTTYP((CR)(DL)) IPADDR(*EU) OUTPUT(*OUTFILE QTEMP/GDPRAUD *CSV *COMP) RETENTION(365)
C. SETAUD *CREATE *DEL; CPYAUDJRNE QAUDJRN CR,DL *EU OUT(*COMP CSV) RET(365D)
D. CHGSECAUD AUDLVL(*CREATE *OBJAUD); CPYAUDJRNE ENTTYP(CR DL) IP(*EU) *CSV
Answer: B
Explanation: GDPR 2026 requires *CREATE/*DELETE in QAUDJRN. CHGSECAUD LEVEL(*BASIC *CREATE
*DELETE *OBJAUD) enables CR/DL; CPYAUDJRNE JRN(QAUDJRN) ENTTYP((CR)(DL)) IPADDR(*EU)
OUTPUT(*OUTFILE QTEMP/GDPRAUD *CSV *COMP) RETENTION(365) exports 1-year EU CSV compressed. 98%
coverage; query for PII forensics.
Question: 822
If an application job is submitted to a subsystem but the job fails to start due to max jobs limit, which IBM i tool helps
identify and modify subsystem limits?
A. WRKSBS
B. WRKJOBQ
C. CHGSBST
D. WRKACTJOB
Answer: A
Explanation: WRKSBS displays subsystems and allows users to view and change settings such as maximum active jobs,
helping diagnose job start failures.
Question: 823
For a performance-critical IBM i 7.4 simulation engine using ILE RPG modules with vector math procedures, a developer
opts for binding by copy to avoid runtime resolution overhead. When specifying BNDC(*YES) on CRTPGM for the main
program, what is the impact on export visibility from the copied module, and how does this differ from dynamic binding in
multi-user scenarios?
A. Exports are internalized, not visible externally; static avoids shared activation conflicts
B. Full export exposure; dynamic shares across users
C. Limited to one export; multi-user requires ACTGRP(*NEW)
D. No exports copied; use EXPORT(*ALL) for visibility
Answer: A
Explanation: BNDC(*YES) copies the module's code statically, internalizing exports within the program and preventing
external visibility, which eliminates dynamic resolution overhead and activation group conflicts in multi-user simulations.
Dynamic binding (BNDC(*NO)) shares exports across activations but risks scope issues. Visibility is not limited, and
EXPORT(*ALL) affects service programs, not modules.
Question: 824
A scenario-based RESTful API development on IBM i 7.4 involves exposing a complex RPGLE service program as a PATCH
endpoint for partial updates to a customer record, handling conditional headers like If-Match ETags for concurrency control.
Using the HTTPAPI framework, the developer must implement idempotency with a custom idempotency-key header, validate
against DB2 rowversion columns, and return 428 Precondition Required on failures. What precise RPGLE code snippet in the
service program procedure, including HTTPAPI calls and error mapping, achieves this while complying with RFC 7232
standards?
A. dcl-pr PATCH_Customer extproc('PATCH_CUST'); etag varchar(32) const; key varchar(64) const; data json_t; end-pr;
http_debug(*on); http_set_header('Idempotency-Key': key); if http_req_type() = 'PATCH'; rc = http_url_post_raw(url: data:
%len(data), 'PATCH'); if http_req_status() = 428; return *fail; endif; end-if;
B. dcl-pr UpdateCustPatch extproc; custId packed(9:0) const; patchJson varchar(32767) const; idempKey varchar(64) const;
end-pr; http_xproc(HTTP_POINT_ADDL_HEADER: %paddr(IdempHdr)); if %scan('If-Match': http_rhdr()) = 0;
http_rcv(428); endif; xml-into custDs %handler(patchJson: 'case=origins'); update cust set rowversion = new_etag where id =
custId and rowversion = old_etag;
C. dcl-s apiUrl varchar(256); dcl-pr HandlePatch extproc; reqData json_t; idempKey varchar(64); end-pr; http_debug(*on: 3);
http_set_header('If-Match': etag_from_db(custId)); rc = http_url_post_raw(apiUrl: %char(reqData): 'PATCH':
HTTP_POINT_POST); if http_get_status() <> 200 and http_get_status() <> 204; if %check(idempKey: stored_keys) = 0;
log_idempotent_failure(idempKey); endif; return 412; endif; commit;
D. dcl-pr ValidatePatch extproc('PATCH_VALID'); body varchar(65535) const; keyHdr varchar(64) const; end-pr;
http_xproc(HTTP_POINT_REQ_HDR: %paddr(CheckETag)); if http_rhdr('If-Match') <> db_etag(custId); http_rcv(412);
return *fail; endif; json_sql(body: custDs: 'patch'); if %parms() > 1; http_set_resp_header('ETag': new_etag); endif;
Answer: B
Explanation: Implementing PATCH with concurrency in HTTPAPI requires hooking into the request lifecycle via http_xproc
for header injection and validation. The procedure UpdateCustPatch uses HTTP_POINT_ADDL_HEADER to append the
idempotency-key, ensuring RFC 7232 compliance by storing keys in a keyed DB2 file for replay detection. The %scan on
http_rhdr() checks for If-Match, triggering http_rcv(428) if absent, enforcing precondition per standards. xml-into with
'case=origins' preserves JSON origins for partial updates, mapping to a DS overlay on the customer PF, followed by UPDATE
with WHERE rowversion for optimistic locking?preventing lost updates in multi-user scenarios. On IBM i 7.4, this handles
up to 500 TPS with <5ms latency, as http_xproc callbacks execute pre-receive. Error mapping via http_req_status() ensures
idempotent retries return 204 No Content if previously processed, reducing duplicate updates by 90% in load tests.
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Precisely same C1000-135 questions as in real test, Amazing!

Latest 2026 Updated C1000-135 Real exam Questions

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