Aon Assessment Guide for Technical Candidates: Coding, Ability Tests, Games, and Candidate Reports

An Aon assessment invitation may lead to coding, a short reasoning test, a game-like task, a work-style questionnaire, or several modules combined into one stage.

The most important point is simple: there is no single universal Aon assessment for technical candidates. The employer selects the modules, deadlines, scoring rules, and report access.

This guide explains how the major Aon modules differ, what employers may review, what candidates may receive, and how to prepare without memorizing one company's old test.

Aon Assessment: Quick Answer

An Aon assessment is an employer-configured collection of online tests measuring job-relevant abilities, skills, or behaviors. For a technical candidate, it may include coding, numerical or verbal reasoning, abstract logic, working memory, situational judgment, or a personality questionnaire. Your invitation is the source of truth because the mix changes by employer and role.

Possible module	What it covers and how to prepare
Coding simulation	Correctness, efficiency, and code quality; practice implementation, edge cases, and explanation.
Ability test	Numerical, verbal, logical, or concentration skills; practice the named format with timed accuracy.
Game-like task	Planning, working memory, numeracy, or judgment; learn the interface and use a consistent strategy.
Work-style questionnaire	Job-relevant preferences; respond honestly and attentively rather than inventing a persona.
Candidate feedback report	An explanation of results when released; read the dimensions without treating them as the hiring decision.

Why There Is No Single Aon Test Format

Aon's assessment-taker guidance says online assessments can combine tests and questionnaires based on the position. It gives examples spanning memory, concentration, language skills, performance tests, personality questionnaires, and professional knowledge.

Two candidates can therefore describe very different "Aon assessments." One may receive a short logical-reasoning module, another coding plus numerical reasoning, and a third a work-scenario simulation with no programming.

Modules usually begin with untimed instructions, a demonstration, and examples. Before the timer starts, confirm the controls, whether you can revisit items, permitted aids, and how the timer behaves.

Aon says individual tests often last less than 15 minutes, but there is no standard total duration. Separate modules may be completed on different days before the deadline; a started timed module normally cannot be paused.

What to Expect From an Aon Coding Assessment

Aon's talent assessment products page describes a configurable coding simulation across more than 30 programming languages and five complexity levels. It says employers can assign coding challenges, observe progress, and evaluate logically correct, complete, and algorithmically efficient code.

That capability does not mean every Aon invitation includes coding. Employers choose the role, language, difficulty, and surrounding package. Check the environment before practicing a specific language.

Prepare around four review surfaces:

1. Correctness: your solution satisfies the prompt and visible examples.
2. Hidden cases: empty input, duplicates, boundaries, overflow, malformed data, and repeated operations do not break it.
3. Efficiency: time and space costs fit the constraints rather than merely passing a toy input.
4. Engineering clarity: names, structure, tests, and comments make the approach understandable.

Before coding, restate the input and output contract, note the target complexity, and list three edge cases. Use any sample environment to confirm input handling, output checks, available libraries, and required function signatures. A readable complete solution is more defensible than a clever half-finished optimization.

Ability Tests: Numerical, Verbal, and Logical Reasoning

Aon uses performance test, ability test, and aptitude test for modules measuring concentration, logical conclusions, text comprehension, and related skills. Its candidate page lists named products with different timers and interaction styles.

Official example	Practical preparation
Numerical reasoning: scales numerical, 12 minutes and 37 tasks	Read tables accurately, estimate first, and verify units.
Verbal reasoning: scales verbal, 12 minutes and 49 tasks	Judge claims only from the provided passage.
Inductive logic: scales clx, six minutes	Compare attributes and test the smallest pattern rule.
Working memory: gridChallenge, nine minutes and nine tasks	Preserve state while processing new information.
Planning: motionChallenge, six minutes	Work backward from the goal and avoid irreversible moves.

These examples help identify a module, but they are not a promise that your employer selected it. Match the exact product name in your invitation to Aon's official practice material.

Accuracy and speed both matter on timed performance tests. Aon says correct answers are generally added and incorrect answers can reduce the result, so random rapid clicking may be worse than controlled progress. Use a soft stop rule: if you cannot identify a defensible next step, choose according to the stated scoring rules and move on.

What Aon's Game-Like Tasks Actually Measure

"Game-based" does not mean gaming experience creates an automatic advantage. Aon uses game elements in ability and situational-judgment tasks while still measuring job-relevant constructs.

For example, Aon's candidate page describes chatAssess as a 20-minute messaging simulation in which candidates respond to work-related scenarios. It also lists gridChallenge for working memory, motionChallenge for planning, digitChallenge for numeracy, and switchChallenge for deductive reasoning.

There is no secret winning move. Learn the interface and objective, then use a consistent strategy: define the target state in planning tasks, identify what must be retained in memory tasks, and address the stated work problem in situational tasks.

Candidate Reports vs Employer Reports

The word report can refer to two different outputs. The employer may receive a selection report used to compare job-relevant results. The candidate may receive a feedback report that explains measured dimensions, but access is not automatic.

Aon says each test has a feedback report, but the employer controls whether and when candidates see it. A missing report does not mean the assessment failed to submit.

For performance tests, Aon says points usually reflect correct and incorrect responses. Personality questionnaires have no right or wrong answer. Its product material also says hiring teams can observe coding progress and rate exercises.

Do not treat a percentile, band, or trait label as the hiring decision. Employers may combine results with resume fit, eligibility, interviews, and other screens.

Scoring, Cutoffs, Retests, and Proctoring

There is no universal Aon passing score. Aon supplies assessment tools, while the employer decides which modules to use, the comparison group, how results enter the process, and whether a threshold exists. A cutoff quoted for one employer or role should not be transferred to another.

Aon also says retests are sometimes used later in the hiring process. A repeat module can verify that the result reflects the candidate's own work. Prepare honestly and follow the written rules; do not use outside resources, another person, or AI unless the invitation explicitly permits them.

Aon's product catalog includes optional remote proctoring, but that does not prove every assessment records a webcam or screen. Read the permission and onboarding screens. If your event requests a camera, microphone, full-screen mode, or another monitoring feature, complete the system check early and follow those instructions exactly.

A Practical Preparation Strategy

Turn the invitation into a module map: record exact test names, duration, deadline, device requirements, permitted aids, and whether modules can be completed separately. This keeps your preparation proportional to the actual package.

Use official practice to learn each interaction. Repeat the untimed examples until you can explain the task in one sentence.

For coding, run two or three timed problems in the required language and label each miss: contract, algorithm, implementation, boundary, or pacing. For ability tests, record whether misses came from reasoning, reading, arithmetic, or time pressure.

For game-like and work-style modules, do not rehearse a fake personality. Read each instruction literally, respond consistently, and avoid trying to reverse-engineer an "ideal" candidate. If you need an accommodation, Aon recommends contacting the employer or test provider so the adjustment can be evaluated before the event.

A Seven-Day Preparation Plan

Day	Focus and action
Day 1	Decode the invitation: record modules, timers, deadline, allowed aids, and technical requirements.
Day 2	Complete Aon's official examples for every named ability or game-like module.
Day 3	Establish a coding baseline with two timed problems and review hidden-case failures.
Day 4	Practice numerical, verbal, and logical sets that match the invitation.
Day 5	Repair weak areas by redoing missed patterns and one debugging task without the solution.
Day 6	Simulate the assigned modules with the same device, environment, and permitted aids.
Day 7	Recheck access, accommodations, browser, connection, and deadline; stop heavy practice early.

Frequently Asked Questions

Is the Aon assessment difficult?

Difficulty depends on the employer's selected modules and the role. Short ability tests can feel difficult because of speed, while coding simulations add implementation and hidden-case risk. Use the exact module names in your invitation, complete Aon's practice, and prepare the underlying skill instead of comparing one candidate's question set.

How long does an Aon assessment take?

Aon says there is no standard total duration. Individual tests often last less than 15 minutes, and an employer may assign several modules. The invitation usually estimates the total time and deadline. You can often take breaks between separate tests, but you generally cannot pause after starting one timed module.

Can I use a calculator or notes?

Only when the instructions allow them. Aon says some tests may benefit from a calculator, pen, or paper and that permitted aids are explained during the introduction. Do not assume the same rules apply across numerical, coding, and game-like modules. Read the instruction screen before the timer begins.

Will I receive my Aon assessment results?

Not necessarily. Aon says each test has a feedback report, but the hiring company decides whether to make it available. The employer may contact you only with a next-step decision. If report access matters, ask the recruiter after submission rather than expecting Aon support to disclose the employer's selection outcome.

Does Aon record my screen or webcam?

Aon offers remote-proctoring capabilities, but employers configure their own assessment process. The existence of the feature does not prove your event uses it. Check the invitation, privacy notice, and permission screens for camera, microphone, screen, or full-screen requirements, then follow the rules shown for your specific event.

Final Takeaway

The best Aon preparation starts with classification, not guesswork. Identify whether your package contains coding, ability tests, game-like tasks, work-style questions, or a combination. Learn each official interface, practice timed accuracy, and treat any public cutoff or module list as employer-specific unless your invitation confirms it.

Combine that question-level work with Aon's official examples so you are ready for both the assessment interface and the engineering judgment the next round may require.

Sources and Further Reading

• Aon: Prepare for Your Online Assessment
• Aon: Talent Assessment Products and Tools
• Aon: Pre-Hire Talent Assessment
• Aon: Game-Based Assessment Case Study

Research note: This guide was checked on August 26, 2026. Employers can configure different Aon modules, deadlines, scoring rules, proctoring settings, and feedback access. Your invitation remains the source of truth.