TCS interview questions

Preview Questions

1. Tell me about yourself

   Start with your introduction – Name, course, and college. Mention your education – Briefly describe your academic background and what you’re currently pursuing. Talk about your skills – Focus on relevant technical...

2. What are static methods?

   A static method is a method that belongs to the class rather than any specific object. It can be called without creating an instance of the class. Static methods are mainly used when a behavior or logic is common to all...

3. Difference between throw and throws ?

   The difference between throw and throws is simple — both are used in exception handling, but they serve different purposes. The throw keyword is used inside a method to actually throw an exception. It signals that an...

4. How does a destructor work in Java?

   In Java, there is no destructor like in C++. Instead, Java uses a process called garbage collection to automatically free up memory when an object is no longer in use. When an object has no active references, the...

5. What are super, primary, candidate, and foreign keys?

   In a database, keys are used to uniquely identify records and establish relationships between tables. A Super Key is any combination of attributes that can uniquely identify a record in a table. For example, in a...

6. Difference between BETWEEN and IN operators in SQL.

   The BETWEEN and IN operators in SQL are both used for filtering records, but they work differently. The BETWEEN operator is used to filter data within a range of values. It checks whether a value falls between two given...