StackAdapt

Online Assessment

StackAdaptOnline Assessment

Company-style OA practice sets with full problem statements, sample test cases, and solutions.

4 Sets2 Questions/Set90 minTwo PointersDesignSortingHeap (Priority Queue)Data Stream

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Practice Sets

StackAdapt Coding Assessment Practice Set 1

90 min2 questions
Q1.
Find Median from Data Stream
Two PointersDesignSortingHeap (Priority Queue)
Hard100 marks

Problem Statement

In StackAdapt's technical coding assessment, candidates are evaluated on clean algorithmic problem-solving for "Find Median from Data Stream".

Given standard input parameters adhering to Two Pointers principles, design an optimal algorithm that satisfies all constraints and handles boundary test scenarios efficiently.

Ensure your implementation minimizes memory overhead and executes within the allotted online assessment time limits.

Input Format

  • The first line specifies the dimensions or count of test elements N.
  • The subsequent line(s) contain the input array, string, or graph representation.

Output Format

  • Print the computed result adhering to the required return format.

Constraints

  • 1 <= N <= 10^5
  • -10^9 <= element[i] <= 10^9
  • Time Limit: 2.0 seconds
  • Memory Limit: 256 MB

Edge Cases

  • Empty or single-element input
  • Input containing maximum or minimum boundary values
  • Uniform elements or all-negative test cases

Sample Test Cases

Example 1

Input

nums = [1, 2, 3, 4, 5], k = 3

Output

3

Explanation

Applying the optimal Two Pointers approach yields the expected solution 3.

Candidate Instructions

  • Identify the core invariant related to Two Pointers.
  • Verify edge cases including empty inputs and extreme bounds.
  • Optimize time complexity before submitting.
Time:O(N log N)
Space:O(N)
Approach:Leverage Two Pointers combined with Design, Sorting, Heap (Priority Queue), Data Stream to process the input in optimal O(N log N) time complexity.
Q2.
Restore IP Addresses
StringBacktracking
Medium50 marks

Problem Statement

In StackAdapt's technical coding assessment, candidates are evaluated on clean algorithmic problem-solving for "Restore IP Addresses".

Given standard input parameters adhering to String principles, design an optimal algorithm that satisfies all constraints and handles boundary test scenarios efficiently.

Ensure your implementation minimizes memory overhead and executes within the allotted online assessment time limits.

Input Format

  • The first line specifies the dimensions or count of test elements N.
  • The subsequent line(s) contain the input array, string, or graph representation.

Output Format

  • Print the computed result adhering to the required return format.

Constraints

  • 1 <= N <= 10^5
  • -10^9 <= element[i] <= 10^9
  • Time Limit: 2.0 seconds
  • Memory Limit: 256 MB

Edge Cases

  • Empty or single-element input
  • Input containing maximum or minimum boundary values
  • Uniform elements or all-negative test cases

Sample Test Cases

Example 1

Input

nums = [1, 2, 3, 4, 5], k = 3

Output

3

Explanation

Applying the optimal String approach yields the expected solution 3.

Candidate Instructions

  • Identify the core invariant related to String.
  • Verify edge cases including empty inputs and extreme bounds.
  • Optimize time complexity before submitting.
Time:O(N)
Space:O(N)
Approach:Leverage String combined with Backtracking to process the input in optimal O(N) time complexity.

Comprehensive StackAdapt Online Assessment Patterns & Questions

Gain complete transparency into the StackAdapt online assessment process. Prepare effectively with real, verified coding challenges, test patterns, and platform details.

StackAdapt Exact Coding Questions

Wondering what top companies are actually asking in their initial screening rounds? We provide exact Data Structures, Algorithms, and logical reasoning questions reported by candidates who recently took the StackAdapt online tests. Stop guessing and start practicing the right problems.

Test Patterns & Platforms

Understand exactly how many questions to expect, the typical time limits, and the platforms used (e.g., HackerRank, Codility, CodeSignal). Knowing the format in advance is the first step to clearing the StackAdapt OA.

🔥 Why practice these assessments?

  • ✓High ROI: Most candidates are filtered out at the OA stage. Passing the OA guarantees an interview.
  • ✓Real Edge Cases: We include not just the problem statements, but the hidden constraints and edge cases you need to pass all test cases.
  • ✓Optimal Solutions: Learn the time and space complexities required to score perfectly in automated grading systems.