HashedIn

Role: Software Development Engineer (SDE)

College: Not Specified (On-campus)

Interview Date: Not Specified

Interview Type: On-Campus

Result: Selected (implied by detailed experience and tips, no rejection mentioned)

Difficulty: Medium

Rounds: 3 rounds (Online Coding Test, Technical Interview Round 1, Technical Interview Round 2) + HR-type questions in TR2.

Topics Asked: DSA (String-based, Array-based - prefix sums, recursion, Linked List), SQL (basic queries, aggregate functions, WHERE, GROUP BY, Joins, Normalization), DBMS (ER Diagrams), Java concepts (OOP, Collections, Exception Handling), Projects.

Experience:

This experience is for an SDE role at HashedIn by Deloitte through an on-campus drive.

1. Online Coding Test: Total 3 questions.

• 2 String-based problems (involved pattern checking and manipulation).
• 1 Array-based problem (focused on prefix sums and optimization).

The difficulty was Medium, and the candidate was able to solve all three within time with full test cases passing.

2. Technical Interview Round 1:

• SQL Questions: Basic queries, aggregate functions, filtering using WHERE, and GROUP BY.
• DSA Questions: One based on recursion, one on Linked List, and one based on arrays.
• Other Questions: Discussion on internships (explained what was done, tools used, challenges faced). Java concepts: OOP, Collections, and exception handling.

3. Technical Interview Round 2:

• Project Discussion: In-depth explanation of projects listed in the resume — architecture, tech stack, challenges, and how they were handled.
• SQL & DBMS: Joins (inner, left, right, full), Normalization (1NF, 2NF, 3NF), ER Diagrams (drawing and explaining entity relationships).
• HR-type Questions: Current role and responsibilities, what motivates the candidate, and long-term goals.

Tips: Be thorough with SQL, DBMS, and Java basics. Prepare to explain projects clearly (architecture, contribution, problem-solving approach). For DSA, practice standard medium-level problems on strings, arrays, and linked lists.