Stack Interview Questions [2026-2027]

I had a hackerrank coding interview with agoda. This is round 1. I failed miserably. The question was **Leetcode 1209. Remove all adjacent duplicates in a string.** Whats frustrating is i could not ev

YoE: 7 Experience: mid & large scale MNCs Date: November, 2024 Round 1 (Coding) Problem 1 /* Design a custom stack structure that supports standard stack operations while efficiently tracking both the minimum and maximum...

I\'ve just taken the OA of shopee There are 2 coding test in 60mins I think they belongs to Easy difficulty according to leetcode problem difficulty They are using Glider First one is...

Concentric AI Pune had total 4 Technical Rounds. 2 Rounds online + 2 rounds offline 1st Round (30 mins): https://leetcode.com/problems/daily-temperatures/description/ Post solving this problem, interviewer asked to implement my custom stack and use my...

R1 With HM. - Tell me about yourself - What is the role that I'm looking forward? - Lead developer or manager? - Tell me a complex project that you have worked on and what were the challenges face

I completed technical phone screen for Airtable and wanted to share my experience. No AI allowed unfortunately :( ## Overview - Quick intros - Demo of a feature in an Airtable app - The actual exercis

I had an interview with 24*7 innovation labs. Their process is telephonic followed by 3 f2f interviews.Round-1 Telephonic1) Stack reversal in place2) How Hashmap worksI wa...

I recently got a call from Akosha Bangalore for on-site interview. This Interview had three round, two technical and one manager round. Round 1: Written Test : 30 Min*20 M...

Blackrock visited our campus for a recruitment drive, providing an exciting opportunity for students to showcase their skills and secure positions in their esteemed organi...

First Round (Online Test) The online test had three sections Software Aptitude: The questions were based on system design. The problem was described and, system design...

Implement a basic calculator that can perform addition and multiplication based on a string.

BlackRock visited our campus and a total of 600 students applied for it. Round 1: This was the online shortlisting round. There were 3 Sections and test was conducted on...

LeetCode #155: Min Stack. Difficulty: Medium. Topics: Stack, Design. Asked at Yandex in the last 6 months.

LeetCode #155: Min Stack. Difficulty: Medium. Topics: Stack, Design. Asked at Palo Alto Networks in the last 6 months.

LeetCode #20: Valid Parentheses. Difficulty: Easy. Topics: String, Stack. Asked at Two Sigma in the last 6 months.

LeetCode #726: Number of Atoms. Difficulty: Hard. Topics: Hash Table, String, Stack, Sorting. Asked at Agoda in the last 6 months.

LeetCode #1209: Remove All Adjacent Duplicates in String II. Difficulty: Medium. Topics: String, Stack. Asked at Agoda in the last 6 months.

LeetCode #394: Decode String. Difficulty: Medium. Topics: String, Stack, Recursion. Asked at Agoda in the last 6 months.

LeetCode #739: Daily Temperatures. Difficulty: Medium. Topics: Array, Stack, Monotonic Stack. Asked at Agoda in the last 6 months.

LeetCode #20: Valid Parentheses. Difficulty: Easy. Topics: String, Stack. Asked at ServiceNow in the last 6 months.

LeetCode #20: Valid Parentheses. Difficulty: Easy. Topics: String, Stack. Asked at Autodesk in the last 6 months.

LeetCode #394: Decode String. Difficulty: Medium. Topics: String, Stack, Recursion. Asked at Tencent in the last 6 months.

LeetCode #2696: Minimum String Length After Removing Substrings. Difficulty: Easy. Topics: String, Stack, Simulation. Asked at Wells Fargo in the last 6 months.

LeetCode #227: Basic Calculator II. Difficulty: Medium. Topics: Math, String, Stack. Asked at IXL in the last 6 months.

LeetCode #227: Basic Calculator II. Difficulty: Medium. Topics: Math, String, Stack. Asked at Rivian in the last 6 months.