Dell Interview Questions — 7 DSA Problems

7 problems with full solutions in Python, Java, C++, JavaScript, Go, Rust.

Most frequently asked Dell LeetCode questions for software engineering interviews.

• Valid Parentheses (EASY) — String, Stack
• Merge k Sorted Lists (HARD) — Linked List, Divide and Conquer, Heap (Priority Queue), Merge Sort
• Longest Substring Without Repeating Characters (MEDIUM) — Hash Table, String, Sliding Window
• Group Anagrams (MEDIUM) — Array, Hash Table, String, Sorting
• Longest Palindromic Substring (MEDIUM) — Two Pointers, String, Dynamic Programming
• Delete Duplicate Emails (EASY) — Database
• Department Top Three Salaries (HARD) — Database