The feature type TechJob has the following registered validators:TechJob.

Detailed Answer in Step-by-Step Solution:

Objective: Determine which validator handler runs for is_tech_job(job_family='Engineering').

Understand Validator System: Likely ADS SDK—executes handlers based on conditions.

Analyze Validators:

Default: is_tech_job_default_handler—No condition, fallback.

Open: is_tech_job_open_handler—Condition ('job_family',)—requires job_family arg.

Closed: is_tech_job_closed_handler—Condition ('job_family': 'IT')—requires job_family='IT'.

Evaluate Call: job_family='Engineering'—Matches job_family presence, not IT.

Reasoning:

Open handler applies (tuple condition means arg exists).

Closed fails (Engineering ≠ IT).

Default is overridden by specific matches.

Conclusion: D is correct.

OCI ADS documentation states: “Validators execute the most specific handler matching the condition; for is_tech_job(job_family='Engineering'), is_tech_job_open_handler (D) runs as it matches job_family presence, while is_tech_job_closed_handler (C) requires IT—default (A) is bypassed, no error (B).” Only D fits per ADS validator logic.

Oracle Cloud Infrastructure ADS SDK Documentation, "Feature Type Validators".