Subjects you should prepare well before campus interviews:

C / C++ / Java [10%]

DSA [25%]

Operating System [5%]

DBMS [10%]

Computer Architecture [5%]

Networking [5%]

Software Engineering [10%]

System Design [5%]

Specialized Subjects [20%]

Data Science (incl. Python, SQL)

Machine Learning (incl. Python)

Web Development (HTML, CSS, JavaScript, React)

Databases (SQL, NoSQL)

Behavioral Skills [5%]

Source: x.com/swapnakpanda/status/1857803400143831078