Deep Merge With Business Rules | Dataford Interview Questions

Write a function that deeply merges two complex configuration objects while handling arrays and null values according to custom business rules.

Implement def deep_merge(base, override):. Both arguments are JSON-like dictionaries. Recursively merge dictionaries, concatenate arrays as base + override, let non-null override values replace base values, and preserve the base value when an existing key has a null override; keys appearing only in the override are copied, including null values. Return a new object without mutating either input.

Constraints

Both inputs are JSON-like dictionaries containing dictionaries, arrays, strings, numbers, booleans, or null
Nested dictionaries can have arbitrary depth up to 100 levels
Array order must remain base elements followed by override elements
The function must not mutate either input object
Keys appearing only in the override must be included in the result

Function Signature

def deep_merge(base, override):

Your question is Deep Merge With Business Rules. Start with the requirements in the Question tab.

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Problem

Write a function that deeply merges two complex configuration objects while handling arrays and null values according to custom business rules.

Constraints

Both inputs are JSON-like dictionaries containing dictionaries, arrays, strings, numbers, booleans, or null
Nested dictionaries can have arbitrary depth up to 100 levels
Array order must remain base elements followed by override elements
The function must not mutate either input object
Keys appearing only in the override must be included in the result

Function Signature

def deep_merge(base, override):

Your question is Deep Merge With Business Rules. 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.