How to prepare for them?

“Here are some ideas to help you prepare for interviews at software companies on day-1 and day-2. Please follow these tips”

~ During your winter vacation (December), take a course called Algozenth - 201. If you're new to programming concepts like the 'printf' statement in the C language, start from scratch and build your foundation in this one month. Even if you've taken the course before, it's a good way to reinforce your skills.

~ During the summer vacation, which is around 60-80 days, start working on LeetCode problems once you've completed about 40-50% of the Algozenith 201 courses. Focus on dynamic programming and graph-related problems. Aim to solve at least 100-150 (dp + graph) LeetCode questions to become proficient."Before watching the DP and graph videos from Algozenith, make sure to watch the videos on YouTube by 'Strive' for both DP and graphs (highly recommended)."

~ As you complete around 20% of the Algozenith course, begin participating in the ABC contest (AtCoder Beginner Contest) held every Saturday at 5:30 PM. The first four questions are relatively easier, while the last four require more attention. If you can't solve a problem during the contest, try working on it after the contest (**very important).

~ In the final weeks leading up to interviews, learn Computer Science concepts related to Object-Oriented Programming (OOPs). Watch lectures 6 to 18 of the 'C++ by Saurabh Shukla' series and practice all the OOPs questions on InterviewBit (there are about 50 multiple-choice questions). If you have time, you can also explore subjects like Operating Systems (OS), Databases (DBMS), and Networking for additional knowledge(+ point).
“Having a strong grasp of CS fundamentals, especially OOPs, is crucial."