Cognizant uses technical screens for some roles. Some early-career paths include communication, aptitude, coding, SQL, and skill-based tests. Cognizant says the process varies by role and location. One recent technical-track candidate described an assessment format based on the programming cluster, so use your invitation to confirm the exact format.

One 2025 candidate received two medium-difficulty array and string questions in one hour, followed by SQL and technical fundamentals. A separate candidate in another track received Java coding and SQL before communication and interview stages.

When to Expect the OA for Your Role

In structured early-career programs, candidates generally take an assessment after registration and resume screening. Communication or aptitude may come before or after the technical assessment. Experienced candidates speak with a recruiter and take a technical assessment only if the role requires one.

The skill-set name in your invitation may indicate the programming language and whether SQL, web, cloud, or other technical modules are included.

Does Your Online Assessment Matter?

This test helps determine who advances to technical and HR interviews. Cognizant doesn't have a single cutoff for a particular role and the signals may vary per module. Prepare across the full cluster of coding, SQL, and technical modules.

Compiled List of Cognizant OA Question Types

These problems cover strings, arrays, counting, linked lists, loops, numeric types, trees, and SQL ranking.

1. Valid Palindrome - Normalized string comparison
2. Fibonacci Number — Iterative Sequence State
3. Reverse Integer - Digit manipulation and overflow
4. Merge Two Sorted Lists - Merge sorted lists with a pointer
5. Invert Binary Tree - Tree traversal (recursive or iterative)
6. LeetCode - Remove Duplicates from Sorted Array: In-place array compression
7. Group Anagrams - String-frequency key
8. LeetCode 709. First Unique Character in a String
9. Second Highest Salary - SQL ordering and null handling.
10. Combine Two Tables — SQL joins and missing matches

Cognizant Interview Questions

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How to Prepare and Pass the Cognizant Online Assessment

Spend the first 4 days on arrays, strings, loops, and basic data structures. Spend the next 3 days on SQL joins, functions, grouping, and ranking. Use the final 3 days for timed mixed mock questions and any web, cloud, or language fundamentals listed in the invitation.

Test each solution with empty inputs, single values, duplicates, and boundary cases. After each practice test, use Lodely to review recent Cognizant technical and behavioral questions, including project explanations and core language topics.

Cognizant Interview Question Breakdown

Valid Palindrome

Type: String normalization and two pointers. Prompt: Determine whether a cleaned string reads the same forward and backward. The Trick: Case, spacing, and other characters can break an otherwise correct comparison. What It Tests: Input handling, loop logic, and edge cases.

Merge Two Sorted Lists

Type: Linked lists. Prompt: Merge two ordered linked lists into one ordered list. The Trick: One list ends first, so the remaining nodes must stay connected correctly. What It Tests: Data-structure basics and precise mutation.

What Comes After the Online Assessment

Candidates who pass the required modules move on to technical and HR interviews. One candidate was asked about programming basics, object-oriented programming, SQL, project experience, and behavioral questions. Review the code and queries you practiced, and prepare to explain your projects and the choices you made.

Conclusion

Base your preparation on the skill group in your invitation, with extra attention to basic coding and SQL. Use Lodely's Cognizant questions to prepare for the technical and behavioral interviews that follow.