| Medium | Letter Combinations of a Phone Number | Amazon Apple Atlassian Capital One Databricks eBay Facebook Google Microsoft Morgan Stanley Oracle Qualtrics Twilio Uber VMware Walmart Labs | queue |
| Medium | Top K Frequent Elements | Amazon Apple Bloomberg ByteDance Capital One eBay Facebook Google Microsoft Oracle Pocket Gems | queue |
| Medium | Level order traversal using two Queues | Amazon Hike Microsoft Morgan Stanley | queue |
| Hard | Find the First Circular Tour that visits all the Petrol Pumps | Amazon Factset Microsoft Morgan Stanley Zoho | queue |
| Medium | Minimum sum of squares of character counts in a given string after removing k characters | Amazon | queue |
| Medium | First negative integer in every window of size k | Accolite Amazon PayPal Soroco | queue |
| Medium | Queue based approach for first non-repeating character in a stream | Amazon Flipkart Microsoft PayU Yahoo | queue |
| Hard | Distance of nearest cell having 1 in a binary matrix | Accenture Amazon Honeywell HSBC Hulu Twitter | queue |
| Hard | Sum of minimum and maximum elements of all subarrays of size k | ByteDance Capital One CouponDunia Databricks Google Twilio Yandex | queue |
| Hard | Find the largest multiple of 3 | Amazon | queue |
| Medium | Check if a queue can be sorted into another queue using a stack | Amazon American Express MAQ | queue |
| Medium | Priority Queue using doubly linked list | Amazon Citadel MAQ Wooker | queue |
| Easy | Implement Stack and Queue using Deque | Fanatics GE Healthcare MAQ Myntra Qualcomm | queue |
| Medium | Implementation of Deque using circular array | Amazon GE Healthcare Google Microsoft | queue |
| Medium | Priority Queue Using Singly Linked List | BrowserStack Hulu Mahindra Comviva Pocket Gems Soroco | queue |
| Easy | Reversing the First K elements of a Queue | BlackRock JP Morgan Robinhood Sprinklr Wooker ZScaler | queue |
| Easy | Sorting a Queue without Extra Space | Belzabar GE Healthcare Mahindra Comviva MAQ Nvidia Qualcomm ServiceNow | queue |
| Easy | Reversing a Queue using Recursion | | queue |
| Easy | Queue using Stacks | Accolite Adobe Amazon DE Shaw Flipkart Goldman Sachs InfoEdge InMobi MakeMyTrip MAQ Microsoft Morgan Stanley Oracle Walmart Labs | queue |
| Easy | Reversing a Queue | Accolite Coursera Delhivery Factset GreyOrange Zoho | queue |
| Easy | Priority Queue in C++ | Amazon Fourkites Infosys Microsoft Oracle | queue |
| Easy | Priority Queue | Amazon Avalara CodeNation Goldman Sachs Google Microsoft | queue |