Prompt Templating With JSON Validation | Dataford Interview Questions

Implement a basic prompt templating utility that fills placeholders and validates structured JSON output. Use {{name}} placeholders, a variables dictionary, a JSON response string, and a recursive schema supporting object, array, string, number, integer, boolean, and null. Implement render_and_validate(template, variables, response, schema) and return [rendered_prompt, parsed_json], or [None, None] for missing placeholders, invalid JSON, or schema violations.

Constraints

The template and response are strings.
variables is a dictionary whose values are convertible to strings.
Placeholder names contain letters, digits, and underscores, and cannot start with a digit.
The schema uses only object, array, string, number, integer, boolean, and null types.
Object schemas may contain required and properties fields; array schemas may contain items.
Schema nesting depth is at most 100.

Function Signature

def render_and_validate(template, variables, response, schema):

Your question is Prompt Templating With JSON Validation. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Constraints

The template and response are strings.
variables is a dictionary whose values are convertible to strings.
Placeholder names contain letters, digits, and underscores, and cannot start with a digit.
The schema uses only object, array, string, number, integer, boolean, and null types.
Object schemas may contain required and properties fields; array schemas may contain items.
Schema nesting depth is at most 100.

Function Signature

def render_and_validate(template, variables, response, schema):

Your question is Prompt Templating With JSON Validation. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.