QREP
Qlik Replicate Certification Exam
QREP Exam Guide: What to Verify, Study, and Practise
The permitted IBM sources describe Q Replication, not a published Qlik-branded certification or an official exam blueprint named QREP. They establish a technology built around Q Capture, IBM MQ queues, Q subscriptions, and Q Apply for moving committed transactional data between source and target systems. This guide therefore helps a candidate make the right preparation decision: first confirm which organization owns the exam and its current objectives, then build practical knowledge around Q Replication architecture, configuration, high availability, latency, recovery, and operations rather than relying on unsupported exam-format assumptions.
Confirm what “QREP” means before you schedule
Do not book an exam until the issuing organization, certification title, current objectives, and registration page are confirmed. The permitted official research does not verify a Qlik-branded product or certification called “Qlik QREP”; it identifies IBM Q Replication instead. That distinction affects every study resource and prevents preparation for the wrong technology.
What the available evidence establishes
IBM documentation identifies Q Replication as a high-volume, low-latency replication solution that uses IBM MQ message queues to transmit transactions between source and target databases or subsystems. IBM documents support for Db2 targets, native Oracle targets, and federated targets. These are product capabilities, not proof of a certification’s eligibility rules or test structure.
What remains unverified
The supplied research does not provide an official exam code, prerequisite, question count, passing score, exam duration, language list, delivery method, price, testing location, retirement date, or domain-weighted blueprint. Treat any page that supplies those details without a current issuer source with caution. Confirm them directly with the organization named on your registration page before paying or scheduling.
The practical decision
If your intended credential is an IBM certification, use the current IBM certification page and exam-specific objectives as the controlling authority. If a training provider or marketplace uses QREP as a catalogue label, ask for the official sponsor and an examinable objective list. Until that evidence is available, use this article as a Q Replication technology study plan, not as a claim about an official exam format.
Understand the replication path end to end
A useful mental model follows a committed source transaction through capture, transport, subscription mapping, and application. Q Capture reads changes from the source database recovery log and sends transactions as messages through queues; Q Apply reads messages from receive queues, converts them to SQL, and applies transactions to target tables.
Source capture
Start with the source recovery log rather than with target tables. Q Replication sends committed transactional data as soon as it is read from the source log, without staging the data in tables. In a study session, explain what information must be captured, when a transaction becomes eligible to move, and why log access is central to timeliness and recoverability.
IBM MQ transport
The official tutorial covers one-way replication between two databases and the configuration of IBM MQ queue managers, queues, and channels for transporting replication messages. Study the transport as a chain of dependencies: the source-side capture process, the sending path, the receiving path, and the apply process. Draw the path and annotate where a message could wait or fail.
Target application
Q Apply reads replication messages from receive queues, converts them to SQL, and applies the transactions to target tables. Practise describing the difference between receiving a message and successfully applying its transaction. A queue can contain work that has arrived but has not yet produced the expected target state, so troubleshooting must separate transport delay from apply delay.
Table pairing
Q Replication uses Q subscriptions to pair source tables with target tables. Include the subscription in every design exercise: identify the source object, target object, direction, and intended data relationship. Do not reduce replication to a generic “copy database” operation; the documented pairing mechanism is part of the configuration and reasoning model.
Study the skills the sources actually support
Because no official QREP blueprint is supplied, the domains below are study domains derived from the IBM documentation and Redbooks topics. They are not percentage weights or an exam-authorized scope. Use them to organize practice, then replace or refine them when the exam owner publishes current objectives.
Architecture and component roles
Be able to distinguish Q Capture, Q Apply, IBM MQ, recovery logs, queues, and Q subscriptions. Explain the direction of data movement and the responsibilities of each component without blending capture, transport, and application into one vague process.
Configuration and topology
The IBM tutorial provides a one-way replication example involving two databases and IBM MQ queue managers, queues, and channels. Build from that simple topology before attempting more complex designs. The Redbooks material also covers two-node, advanced two-node, and three-node scenarios, giving you a basis for studying alternative high-availability arrangements.
High availability and workload distribution
The Redbooks publication focuses on high availability solutions using Q Replication on IBM z/OS and includes design, implementation, management, latency analysis, and recovery procedures. IBM’s community material also describes synchronized Db2 targets for planned or unplanned source outages and workload distribution. Study the business requirement first, then map it to a topology and operating procedure.
Latency and throughput reasoning
The Redbooks source identifies low latency and high throughput as contributors to timely data availability and includes a chapter on latency analysis. Prepare to reason through where delay is introduced: source-log reading, message transport, queue wait, or target application. Avoid memorizing a single performance promise; investigate the path and the relevant workload conditions.
Operations and recovery
The Redbooks contents specifically include managing Q Replication in the Db2 for z/OS environment and recovery procedures. Your practice should cover detecting an unhealthy flow, identifying the affected component, protecting consistency, and restoring service according to documented procedures. Do not invent recovery commands from memory; use the version-specific IBM documentation for execution details.
Use the IBM tutorial as your first lab sequence
Begin with IBM’s one-way replication tutorial because it supplies a bounded learning path: two databases plus the queue managers, queues, and channels needed to transport replication messages. Reproduce the conceptual sequence in notes or an authorized lab, and record each prerequisite and verification point instead of copying commands without understanding them.
Prepare the diagram
Before configuration, draw two database endpoints, the source recovery log, Q Capture, the sending queue path, the receiving queue path, Q Apply, and the target tables. Add Q subscriptions between the selected source and target tables. This diagram becomes a checklist when a test scenario asks which component is responsible for a symptom.
Record assumptions explicitly
Write down the source and target database products, replication direction, queue-manager arrangement, selected tables, and expected target result. The sources discuss several target categories and different topologies, so an answer that is correct for one arrangement may not transfer unchanged to another. State the assumption before choosing a configuration or diagnosis.
Verify each boundary
After studying each stage, ask a separate question: has the source change been committed, has Q Capture read it, has a message moved through IBM MQ, has Q Apply read it, and has the target table changed? This sequence prevents the common mistake of treating “not visible at the target” as one undifferentiated failure.
Move from one-way replication to design scenarios
Once the basic flow is clear, compare topologies by requirement rather than by complexity. The Redbooks source presents two-node, advanced two-node, and three-node scenarios, while IBM’s community material describes unidirectional and bi-directional replication involving Db2 LUW and Db2 on RDS. Use each scenario to ask what availability, distribution, and operational trade-off it is intended to address.
Two-node thinking
A two-node exercise should make you identify the primary source, target, replication direction, queue path, and action required if the source becomes unavailable. The goal is not to memorize a diagram; it is to explain how the target supports the stated business requirement and what must be managed during an outage or transition.
Advanced and three-node thinking
For advanced and three-node scenarios, list every node and every direction before discussing failover or workload placement. Identify which data paths are active, which systems are expected to serve workloads, and how recovery differs from ordinary message flow. Keep topology facts separate from assumptions that are not stated in the scenario.
Cloud-target considerations
IBM’s community article describes Q Replication support for Amazon RDS for IBM Db2, including replication between Db2 LUW and Db2 on RDS and between Db2 on RDS environments. It also describes support for different Db2 versions on source and target and continuous near-real-time synchronization. Treat these as documented solution capabilities, while checking current product documentation for configuration limits and prerequisites.
Prepare for high availability questions
Answer availability questions by connecting a disruption to a controlled data and application outcome. IBM describes high availability solutions as ways to minimize the impact of planned and unplanned service disruptions, and the Redbooks material addresses recovery and design considerations. Practise explaining what the replicated target is for, what remains to be done operationally, and how consistency is protected.
Planned disruption
For maintenance or an upgrade, identify the intended source and target roles, the point at which applications move, and the checks needed before relying on the target. The supplied sources establish the high-availability purpose but do not prescribe one universal runbook. Use the relevant IBM product and environment documentation for the exact procedure.
Unplanned disruption
For an outage scenario, first determine whether the target has received and applied the required committed transactions. Then separate the technical recovery action from the business decision to redirect workload. A synchronized target can support continuous availability requirements, but the available evidence does not justify assuming that every design provides automatic failover.
Active use of the target
IBM’s community material says the AWS RDS target is not a passive standby and describes both source and target as fully usable for read and write in the stated support context. Do not generalize that statement to every Q Replication topology. In a question or design, check the specific target arrangement and the documented workload model.
Diagnose latency without guessing
Start latency analysis with timestamps or observable states at each stage, not with a conclusion about network speed or database performance. The Redbooks source includes latency analysis, and IBM documents log-based capture without table staging. Your diagnostic method should therefore locate the first point where expected progress stops.
A practical fault tree
If the source change is not committed, it is not yet the replication transaction you are trying to trace. If it is committed but not captured, investigate source-log access or capture health. If it is captured but not delivered, inspect the MQ path. If it is delivered but not reflected in the target, inspect Q Apply, SQL execution, and the target table mapping.
Queue depth is a clue, not a diagnosis
A growing receive queue suggests that messages are arriving faster than they are being applied, but it does not by itself identify the cause. Consider apply throughput, target SQL conditions, locking, mapping, and errors. Likewise, an empty queue does not prove that the target is correct unless the expected transaction has been confirmed as applied.
Use a controlled test
For an authorized lab, make one identifiable source change, note the commit point, and follow it through capture, transport, and application. Change one variable at a time. Record whether the target result matches the source and whether a delay appears before or after message arrival. This builds diagnostic skill without using live exam questions or unauthorized data.
Learn recovery as a decision process
Recovery preparation is more valuable than memorizing isolated commands. The Redbooks publication explicitly includes recovery procedures, so organize your notes around detection, impact assessment, safe intervention, resynchronization, and verification. Exact commands depend on product version and environment; consult the applicable IBM documentation before executing them.
Protect the evidence
Before changing a failing component, record the source transaction context, queue state, subscription, target state, and reported error. This preserves the facts needed to distinguish a transport problem from an apply or mapping problem. Avoid “fixes” that discard messages or alter subscriptions before you understand their effect.
Define the recovery boundary
State whether the issue affects one table pair, one subscription, one queue path, one Q Apply process, or the broader topology. A narrow fault may require a narrow correction; a wider interruption may require a coordinated recovery procedure. The correct boundary is a reasoning result, not a default assumption.
Verify after intervention
Recovery is incomplete when a process starts. Confirm that messages progress, the intended source changes reach the correct target tables, errors remain controlled, and the operational state matches the design. For high-availability use, also verify the business transition conditions rather than assuming technical process health alone proves application readiness.
Build a study notebook that mirrors the product
Organize notes by component, transaction path, topology, symptom, and decision. For each concept, write a short explanation, a diagram, one observable verification point, and the IBM source supporting it. This is more useful than collecting disconnected definitions because it forces you to connect architecture with troubleshooting and design.
Component cards
Create one card each for Q Capture, Q Apply, IBM MQ queue managers, queues, channels, recovery logs, Q subscriptions, source databases, and target databases. On every card, answer: what does it read or write, where does it sit in the flow, and what failure would appear downstream?
Scenario tables
Use a table with columns for business requirement, topology, replication direction, target use, likely risk, monitoring evidence, and recovery concern. Populate it from the IBM tutorial, the Redbooks scenarios, and the documented Db2 target examples. Mark any item that requires confirmation from current version documentation.
Terminology discipline
Keep “captured,” “sent,” “received,” and “applied” separate in your vocabulary. These words describe different stages. Also distinguish a Q subscription, which pairs source and target tables, from an MQ queue, which transports replication messages. Precise language improves both technical troubleshooting and scenario-based answers.
A four-phase roadmap for preparation
Use a staged plan that moves from architecture to configuration, then diagnosis and design. The schedule should be based on your available study time and verified exam objectives; the sequence below is a practical recommendation, not an official timetable or required course plan.
Phase one: establish the flow
Read the IBM Q Replication overview material and produce the end-to-end diagram. Explain Q Capture, Q Apply, Q subscriptions, recovery-log capture, and MQ transport in your own words. Do not move on until you can locate a failure from a symptom such as “source changed but target did not.”
Phase two: work through the tutorial
Study the official one-way replication tutorial in order. Note the role of each queue manager, queue, and channel, and connect each configuration step to the diagram. If you have an authorized environment, validate one controlled transaction. If you do not, practise the sequence on paper and label unverified implementation details.
Phase three: compare scenarios
Use the Redbooks chapters on high availability, two-node arrangements, advanced two-node arrangements, three-node scenarios, latency analysis, Db2 for z/OS management, and recovery as a reading map. For each scenario, write the requirement, data path, target role, failure concern, and recovery question it raises.
Phase four: test your reasoning
Create original questions from the sources rather than searching for recalled exam items. Examples include: which component reads the recovery log; which component converts received messages to SQL; how are source and target tables paired; where would a message wait; and what evidence distinguishes capture delay from apply delay? Explain every answer and cite the relevant IBM page in your notes.
Choose resources by the question they answer
Use IBM documentation for component behavior and tutorial configuration, the IBM Redbooks publication for high-availability scenarios and operational topics, and the IBM Community article for the documented Db2 on RDS context. Do not treat a product overview as a complete exam blueprint or a community article as a substitute for version-specific reference documentation.
For core behavior
Start with IBM’s Q Replication overview pages. They support the facts that Q Capture reads source recovery-log changes, Q Apply reads receive-queue messages and applies SQL, Q subscriptions pair tables, and committed data is sent without table staging. These facts form the foundation for architecture and troubleshooting notes.
For implementation sequence
Use the IBM tutorial for the one-way two-database pattern and MQ objects involved in message transport. Read actively: write down why each object exists and what evidence would show that it is working. Avoid treating a copied configuration as portable to a different database or topology without checking the current documentation.
For high availability
Use the Redbooks abstract and its listed chapters to guide study of high availability, node scenarios, latency, management, and recovery on the IBM z/OS platform. Keep the z/OS scope visible in your notes; do not silently generalize every z/OS design detail to Db2 LUW, Oracle, federated targets, or cloud deployments.
For Db2 on RDS context
Use the IBM Community article only for the capabilities it explicitly describes, including Q Replication support for Db2 on Amazon RDS in the stated release context, workload distribution, business insight, and continuous availability use cases. Verify current support and configuration details against IBM product documentation before treating them as operational instructions.
Avoid preparation shortcuts that create false confidence
The most damaging shortcut is studying an unverified exam identity or relying on recalled questions. A second is memorizing component names without tracing a transaction. Build evidence-based understanding: use official documentation, practise original scenarios, and verify every product-specific procedure against the version and environment you will use.
Do not assume a blueprint
No domain percentages are supplied in the permitted research, so none are reported here. Do not assign study time from invented weights or compare unlabeled percentages. Once the exam owner publishes an official blueprint, map its named domains to the architecture, configuration, high-availability, latency, and recovery topics in this guide.
Do not confuse capability with entitlement
A documented replication capability does not prove that a candidate has access to a lab, that a feature appears on an exam, or that a particular release is tested. Mark those as separate questions and confirm them from the issuer, product documentation, or training materials authorized for your certification.
Do not use dumps as a study method
Exam dumps and leaked questions are not reliable evidence of current objectives, and memorization does not demonstrate the ability to design, configure, diagnose, or recover a replication flow. Write and solve your own scenarios from the official material instead.
Do not overgeneralize one topology
One-way replication between two databases is a useful starting point, not a universal model. The sources also discuss different node arrangements, Db2 on RDS contexts, and multiple target categories. Always state direction, platform, target, and availability requirement before applying a conclusion.
Check readiness with explain-and-diagnose exercises
You are ready to seek the next official exam decision when you can explain the complete data path, distinguish the principal component roles, interpret a simple latency symptom, and compare a high-availability design with its operating risks. Readiness here means demonstrated technical reasoning; it is not a prediction of an unverified exam result.
Architecture check
Without notes, describe how a committed source transaction moves from the recovery log through Q Capture and IBM MQ to Q Apply and the target table. Include the Q subscription in the explanation and distinguish message receipt from SQL application.
Configuration check
Given a one-way two-database design, list the objects and relationships that must be understood: source and target databases, Q Capture, Q Apply, queue managers, queues, channels, and table pairing. Explain what you would verify after each major configuration stage.
Troubleshooting check
Given that a source row changed but the target row did not, produce separate hypotheses for uncommitted work, capture delay, MQ transport delay, queue backlog, apply failure, and mapping or target SQL problems. Identify the evidence that would confirm or reject each hypothesis.
Design check
Given a requirement for workload distribution or high availability, explain why a replicated target may help, what target use is documented for the chosen context, and which operational questions remain unanswered. Do not claim automatic failover, zero downtime, or a particular topology unless the applicable official documentation supports that exact claim.
Make the scheduling decision only after verification
Before scheduling, capture the official exam title, issuer, objective version, eligibility rules, delivery arrangement, and current registration details from the certification owner. Then compare those requirements with your study notebook and practical evidence. If the issuer cannot be identified, pause the purchase and treat the Q Replication material as product preparation rather than exam preparation.
A final verification checklist
Confirm the credential is genuinely associated with the organization you intend to certify with. Locate current exam objectives. Check whether your experience or training is required. Verify the permitted delivery route and identity requirements. Confirm current registration information directly on the issuer’s site. None of those administrative facts is established by the supplied IBM product sources.
What to do after scheduling
Convert the verified objectives into a gap list. Allocate more practice to skills you cannot explain or diagnose, not merely to topics that are easy to reread. Keep version notes beside every procedure, use authorized environments only, and reserve final review for diagrams, terminology, failure boundaries, and recovery decisions.
Conclusion
The evidence supports a practical Q Replication preparation path, but it does not establish a complete official QREP certification profile. Confirm the credential and blueprint first. Then study the documented transaction flow, practise the IBM tutorial pattern, expand into high-availability and topology scenarios, and use latency and recovery exercises to test your reasoning. That sequence gives you a defensible next step without inventing exam rules or depending on unreliable question collections.