EarnIn

Online Assessment

EarnInOnline Assessment

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

4 Sets2 Questions/Set90 minLinked ListMathRecursionTwo PointersString

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Practice Sets

EarnIn Coding Assessment Practice Set 1

90 min2 questions
Q1.
Add Two Numbers
Linked ListMathRecursion
Medium50 marks

Problem Statement

In EarnIn's technical coding assessment, candidates are evaluated on clean algorithmic problem-solving for "Add Two Numbers".

Given standard input parameters adhering to Linked List 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 Linked List approach yields the expected solution 3.

Candidate Instructions

  • Identify the core invariant related to Linked List.
  • Verify edge cases including empty inputs and extreme bounds.
  • Optimize time complexity before submitting.
Time:O(N)
Space:O(1)
Approach:Leverage Linked List combined with Math, Recursion to process the input in optimal O(N) time complexity.
Q2.
Longest Palindromic Substring
Two PointersStringDynamic Programming
Medium50 marks

Problem Statement

In EarnIn's technical coding assessment, candidates are evaluated on clean algorithmic problem-solving for "Longest Palindromic Substring".

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^2) or O(N * W)
Space:O(N)
Approach:Leverage Two Pointers combined with String, Dynamic Programming to process the input in optimal O(N^2) or O(N * W) time complexity.

Comprehensive EarnIn Online Assessment Patterns & Questions

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EarnIn Exact Coding Questions

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Test Patterns & Platforms

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🔥 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.