Coding Test Device With Dynamic Additional Conditions

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Solution Overview

Problem

Conventional online coding tests struggle to accurately assess a candidate's coding ability due to inconsistent difficulty prediction, high rates of perfect scores, and increased recruitment costs from requiring additional verification.

Innovation Solution

A coding test device and method that utilize a problem-solving coding test with additional conditions, providing a result report that includes an evaluation cumulative score, evaluation score for each step, coding time, CPU usage, and memory usage, to enhance the accuracy of coding ability verification.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional coding tests are used to assess coding ability, then the testing process is simple and quick, but the accuracy of ability verification is low due to inconsistent difficulty prediction and high perfect score rates

Engineering Contradiction:

Improveaccuracy of coding ability verificationVSAvoidcomplexity of test structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The test problem is divided into multiple conditions with different difficulty levels (first condition, second condition, third condition, etc.). Each condition assesses different aspects of coding ability, allowing for more granular and accurate measurement of candidate skills rather than a single binary pass/fail outcome.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The test dynamically changes parameters such as time limits and resource constraints (CPU memory limits) across different conditions. The first condition has a standard time limit, while subsequent conditions impose progressively stricter constraints, enabling differentiation of coding ability through performance under varying parameter settings.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If additional verification is conducted for candidates with ambiguous test results, then the accuracy of hiring decisions improves, but recruitment costs increase

Engineering Contradiction:

Improvereliability of hiring decisionVSAvoidrecruitment cost

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The multi-condition test structure performs preliminary differentiation of coding ability before final hiring decisions are made. By assessing candidates across multiple conditions with varying constraints, the system pre-screens candidates more effectively, reducing the number who require additional verification and thereby lowering overall recruitment costs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces manual interviewer assessment with an automated multi-condition evaluation system that objectively measures coding ability through standardized conditions and automatic grading, reducing subjectivity and the need for additional manual verification steps.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If the number of test problems is increased to improve difficulty adjustment, then test coverage improves, but the time required for candidates to complete the test increases

Engineering Contradiction:

Improvedifficulty adjustment accuracyVSAvoidtest completion time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The test dynamically adjusts difficulty within a single problem by introducing multiple conditions with progressively stricter constraints rather than presenting multiple separate problems. This allows the test to adapt to candidate performance in real-time, maintaining engagement while accurately assessing ability across different difficulty levels.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Multiple assessment objectives are merged into a single comprehensive test problem that evaluates various coding skills across different conditions. Instead of requiring candidates to solve multiple separate problems, the patent combines multiple assessment goals into one unified problem structure, reducing total test time while maintaining measurement precision.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12211393B2Coding test device and coding test method

Publication Date: 2025.01.28 JA-IN LAB CO LTD

AI summary

The present disclosure relates to a coding test device and a coding test method. The coding test device according to one embodiment includes a problem provider for providing a test problem including an initial condition to a user terminal, a code receiver for receiving first algorithm code corresponding to the initial condition from the user terminal, and an additional condition provider for determining whether a predetermined passing condition for the first algorithm code is satisfied and providing an additional condition related to the initial condition to the user terminal based on the result of determination for the first algorithm code.