Hi Suraj if you really want to crack IT company interview in first attempt then you must try following process

Research the job role, required skills, and company’s background means all information about that company also understand their products, services, culture, and latest news about company
Align your skills: Edit your resume and cover letter to highlight how your skills and knowledge match with the job requirements.

2. Technical preparation.
Core concepts: Review essential topics related to the job. Focus on data structures, algorithms, and language skills when applying for software development positions.

Practice coding: Use services like LeetCode, HackerRank, or CodeSignal to practice coding problems. Solve a variety of problems to gain proficiency in various subjects.
Mock Interviews: Use mock interviews to replicate the interview process. Websites such as Pramp and Interviewing.io provide free mock interview sessions.

3.Build a strong portfolio.
Projects: Display your projects on GitHub or your own website. Include full details of your participation, the technologies employed, and the results.
certificates: Obtain relevant certificates to demonstrate your knowledge and dedication to lifelong learning.

4. Behavioral and soft skill preparation
Common Questions: Prepare for frequent behavioral questions by following the STAR (Situation, Task, Action, Result) strategy. “Tell me about a time you faced a challenge” or “Describe a project you are proud of.”
Communication Skills: Practice communicating clearly and succinctly. Prepare to describe technical concepts in simple words.