| 1 | Two Sum | Easy | Google, Amazon, Meta, Microsoft, Bloomberg, Apple, Oracle, Visa, Walmart Labs, Goldman Sachs, Yandex, Nvidia, Comcast, DoorDash, Intel, Infosys, EPAM Systems, TikTok, LinkedIn, Uber, Spotify, Zoho, ServiceNow, Epic Systems, Salesforce, Tinkoff, Hubspot, KLA, Pwc, tcs, Accenture, IBM, SAP, Adobe, Yahoo, PayPal, Capgemini, Deloitte, Samsung, Cisco, Grab, Intuit, Nutanix, Deutsche Bank, Flipkart, Siemens, HCL, Snowflake, Ozon, SoFi, Morgan Stanley, Wipro, Barclays, BlackRock, eBay, Huawei, Nagarro, J.P. Morgan, VMware, Atlassian, Karat, ZScaler, Accolite, American Express, Cognizant, Bolt, BNY Mellon, razorpay, Luxoft, Careem, Publicis Sapient, Quince, Mastercard, Altimetrik, Airbnb, Yelp, Dropbox | No | Array, Hash Table |
| 2 | Add Two Numbers | Medium | Google, Amazon, Bloomberg, Microsoft, Meta, Apple, ByteDance, Yandex, Oracle, Goldman Sachs, Avito, Cisco, Accenture, josh technology, TikTok, Zopsmart, Adobe, Nvidia, Uber, Yahoo, Arista Networks, Zoho, EPAM Systems, Airbnb, Wix | No | Linked List, Math, Recursion |
| 3 | Longest Substring Without Repeating Characters | Medium | Amazon, Google, Microsoft, Bloomberg, Meta, Oracle, TikTok, Goldman Sachs, Apple, Walmart Labs, Turing, Yandex, Infosys, Nvidia, IBM, EPAM Systems, HCL, PayPal, Lyft, Visa, Roblox, Netflix, Zoho, Docusign, Paytm, Palo Alto Networks, Dell, Comcast, ByteDance, Flipkart, Adobe, Salesforce, Accenture, Juspay, Alibaba, opentext, LinkedIn, ServiceNow, American Express, Nagarro, tcs, Agoda, AMD, Wipro, PornHub, Tesla, Spotify, Tinkoff, Yahoo, Uber, Intuit, J.P. Morgan, Grab, eBay, Accolite, Cisco, Zynga, Intel, Qualcomm, Nutanix, Coupang, Airtel, BitGo, Capgemini, PhonePe, Luxoft, MakeMyTrip, Ola Cabs, HPE, BNY Mellon, FreshWorks, Lucid, Yelp | No | Hash Table, String, Sliding Window |
| 4 | Median of Two Sorted Arrays | Hard | Google, Amazon, Meta, Goldman Sachs, Microsoft, Bloomberg, Walmart Labs, Yandex, Oracle, Palo Alto Networks, Autodesk, Wix, Adobe, Zoho, LinkedIn, Rippling, Swiggy, Apple, Uber, Yahoo, TikTok, eBay, VMware, Snap, ServiceNow, IBM, Accenture, Akamai, PornHub, Wipro, Zenefits, Dropbox | No | Array, Binary Search, Divide and Conquer |
| 5 | Longest Palindromic Substring | Medium | Google, Cisco, Amazon, Meta, Microsoft, Bloomberg, TikTok, Apple, Goldman Sachs, IBM, Huawei, Walmart Labs, SAP, Oracle, Salesforce, Softwire, EPAM Systems, PhonePe, Zoho, tcs, Accenture, Pure Storage, Yandex, Commvault, Accolite, ThoughtWorks, Turing, Adobe, Yahoo, Uber, J.P. Morgan, Wayfair, ByteDance, Tinkoff, VMware, LinkedIn, PayPal, Dell, Grab, ServiceNow, LiveRamp, Media.net, Wix | No | Two Pointers, String, Dynamic Programming |