Parsing and Validating Config Files | Dataford Interview Questions

Implement a function to parse and validate complex configuration files, and explain how you would handle syntax or structural errors.

Implement parse_and_validate(text, schema). Parse text as JSON, then validate it against the schema. A schema object maps required keys to rules, a one-element schema list validates every array item, and primitive rules are string, number, boolean, object, and array. Return (config, []) for valid input, or (None, errors) for invalid syntax or validation errors. Each error must contain path and message, using JSON-style paths such as $.server.ports[1].

Constraints

text is a JSON string.
schema is a nested dictionary, a one-element list schema, or a supported primitive rule.
Object schema keys are required, while extra configuration keys are allowed.
Primitive rules are string, number, boolean, object, and array.
Return every validation error found, in depth-first schema order.

Function Signature

def parse_and_validate(text, schema):

Your question is Parsing and Validating Config Files. 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

Implement a function to parse and validate complex configuration files, and explain how you would handle syntax or structural errors.

Constraints

text is a JSON string.
schema is a nested dictionary, a one-element list schema, or a supported primitive rule.
Object schema keys are required, while extra configuration keys are allowed.
Primitive rules are string, number, boolean, object, and array.
Return every validation error found, in depth-first schema order.

Function Signature

def parse_and_validate(text, schema):

Your question is Parsing and Validating Config Files. 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.