DSA Interview Roadmap

Full-Stack Developer

A Full-Stack Developer interview leans on 200 of the 370 curated problems. The other 170 are lower frequency for this role — still here, just not first.

Blends frontend array/string basics with backend system-design questions; per-topic depth is shallower than a pure backend loop.

Focus on: 200
Core topics: 7
Deprioritise: 170
Full catalogue: 370

Track your progress on this roadmap — the map fills itself as you solve.

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What this interview looks like

Full-stack evaluations check end-to-end fluency across client event dispatching and backend service orchestration. Candidates parse network responses, manage sequential workflow steps, and coordinate state changes across asynchronous system boundaries. The interview focuses on practical implementation cleanliness, reliable serialization logic, and reasoning through end-to-end data flows rather than obscure combinatorial proofs.

What it leans away from

Exotic trie structures and combinatoric state memoization sit low in the ordering because daily work centers on delivering cohesive business workflows. Even so, candidates interviewing for backend-heavy product tiers or high-volume data aggregation teams may encounter graph dependency checking or memoized path searches.

The whole path

CoreRole-specificAdvanced

Phase 1 - DSA Foundation
Arrays34 Strings22 Two Pointers6 Sliding Window8 Stack16 Queue4 Sorting7
Phase 2 - Role Skill Gaps
Linked List17 Binary Trees32 BST20 Binary Search16 Recursion7 Matrix6 Intervals5
Phase 3 - Projects and Interview Proof
Graph48 Dynamic Programming51 Backtracking12 Heap13 Bit Manipulation11 Trie9 Greedy15 Math11

Phase 1 - DSA Foundation

The curation places 7 core topics first for this role, leading with practice problems.

01ArraysCore
34 problemsVisualize
Two Sum Maximum and Minimum Element in an Array Reverse the Array Contains Duplicate Read the theory
02StringsCore
22 problemsVisualize
Valid Palindrome Valid Anagram Implement strStr()Longest Common Prefix Read the theory
03Two PointersCore
6 problemsVisualize
Valid Palindrome II Move Zeroes Remove Duplicates from Sorted Array Squares of a Sorted Array Read the theory
04Sliding WindowCore
8 problemsVisualize
Minimum Size Subarray Sum Fruit Into Baskets Number of Substrings Containing All Three Characters Max Consecutive Ones III Read the theory
05StackCore
16 problemsVisualize
Valid Parentheses Next Greater Element I Min Stack Evaluate Reverse Polish Notation Read the theory
06QueueCore
4 problemsVisualize
Implement Queue using Stacks Implement Stack using Queues First Non-Repeating Character in Stream Sliding Window Maximum Read the theory
07SortingCore
7 problemsVisualize
Bubble Sort Selection Sort Insertion Sort Merge Sort Read the theory

Phase 2 - Role Skill Gaps

The curation balances theory and practice equally across these role-specific topics to complete the 200 focus problems.

08Linked ListRole-specific
17 problemsVisualize
Read the theory Reverse Linked List Linked List Cycle Merge Two Sorted Lists Middle of Linked List
09Binary TreesRole-specific
32 problemsVisualize
Read the theory Binary Tree Inorder Traversal Binary Tree Preorder Traversal Binary Tree Postorder Traversal Maximum Depth of Binary Tree
10BSTRole-specific
20 problemsVisualize
Read the theory Two Sum in BST Validate Binary Search Tree Lowest Common Ancestor of a BST Kth Smallest Element in a BST
11Binary SearchRole-specific
16 problemsVisualize
Read the theory Binary Search Search Insert Position Sqrt(x)Lower Bound and Upper Bound
12RecursionRole-specific
7 problemsVisualize
Read the theory Factorial Fibonacci Number Flood Fill (Recursion)Tower of Hanoi
13MatrixRole-specific
6 problemsVisualize
Read the theory Count Negative Numbers in Sorted Matrix Spiral Matrix Set Matrix Zeroes Rotate Image
14IntervalsRole-specific
5 problemsVisualize
Read the theory Meeting Rooms Merge Intervals Insert Interval Non-overlapping Intervals

Phase 3 - Projects and Interview Proof

The curation pushes 170 problems down for this role, so understanding the theory is the goal here.

15GraphAdvanced
48 problemsVisualize
Read the primerunderstanding is the goal here rather than grinding problems
16Dynamic ProgrammingAdvanced
51 problemsVisualize
Read the primerunderstanding is the goal here rather than grinding problems
17BacktrackingAdvanced
12 problemsVisualize
Read the primerunderstanding is the goal here rather than grinding problems
18HeapAdvanced
13 problemsVisualize
Read the primerunderstanding is the goal here rather than grinding problems
19Bit ManipulationAdvanced
11 problemsVisualize
Read the primerunderstanding is the goal here rather than grinding problems
20TrieAdvanced
9 problemsVisualize
Read the primerunderstanding is the goal here rather than grinding problems
21GreedyAdvanced
15 problemsVisualize
Read the primerunderstanding is the goal here rather than grinding problems
22MathAdvanced
11 problemsVisualize
Read the primerunderstanding is the goal here rather than grinding problems

Ready to actually walk this path?

Every topic above links to real problems, step-by-step pattern visualizers, and an in-browser compiler. Your progress tracks automatically as you solve.

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Full-Stack Developer DSA questions, answered

How many DSA problems does a Full-Stack Developer need to solve?

About 200 of the 370 curated problems. Those sit in the 7 topics a Full-Stack Developer interview leans on; the remaining 170 are lower frequency for this role and are worth doing later rather than first.

Which DSA topics matter most for a Full-Stack Developer?

Arrays, Strings, Two Pointers, Sliding Window, Stack, Queue and others — the core tier for this role. Topic priority is mapped per role rather than shared, so a Full-Stack Developer path deliberately differs from a generic sheet order.

Can a Full-Stack Developer skip some DSA topics?

Deprioritise rather than skip. 170 of the 370 problems are lower frequency for a Full-Stack Developer, so they belong after the core tier — not never, but not first. Interviews do occasionally reach outside the common ground.

Is this Full-Stack Developer roadmap free?

Yes. The roadmap, the problem list, the pattern walkthroughs and progress tracking are all free with no signup required to read. Only AI-generated insights are metered.

Other role roadmaps

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Problem set and role mapping as of 11 September 2026.