ProblemNest
Sign In
You are coding as a Guest. Sign in with Google in 1 tap to save your daily streak, lock in +50 XP & boost your college rank!
Save Streak (1-Tap Google)
9:00 AM Daily Incident ReleaseMaintaining a 7-day streak grants a 2.5× Recruiter Visibility Multiplier on the Recruiter Talent Radar.
Multiplier Ladder:1d: 1.0ו3d: 1.5ו7d: 2.5× MAX
🔥Structured Deep Clone (State Immutability)Medium
DAILY PROBLEM OF THE DAY+50 XP • Daily Streak

Solve today's challenge or tackle one of the 3 Super Hard challenges for +150 XP.

MediumWeb Engineering•Acceptance: 59.3%

Structured Deep Clone (State Immutability)

Targeted in FAANG & Tech OA:GoogleAmazonMicrosoftSwiggyUber
Real-World Engineering Context
Essential for predictable React Redux/Zustand state immutability, undo-redo histories, and form drafts.
Given a JSON-compatible nested dictionary/object `obj`, implement a deep clone that produces an independent copy. Mutating the clone must never affect the original.

Sample Test Cases

Input: [{"a":1,"b":[2,3]}]
Expected: {"a":1,"b":[2,3]}
Input: [{"user":{"name":"Alex","roles":["admin"]}}]
Expected: {"user":{"name":"Alex","roles":["admin"]}}

Constraints

  • Object contains only primitive types, lists, and dicts.
Verified Proof-of-Work ATS PortfolioCryptographic Verification
Export tamper-proof problem verifications to your direct ATS applications
DevScore: Unranked (0/1000)

Every verified problem solve writes authentic cryptographic proof-of-work to your profile. Attach your verified DevScore badge to ATS applications to stand out to engineering hiring teams across 4,000+ verified live tech openings (23,000+ cumulative audited) on RoleNest.

Explore 4,000+ Direct ATS Openings on RoleNest ↗Solve Challenge to Activate Ledger