1. OOPS CONCEPTS 2. DIFFERENCE BETWEEN ABSTRACT AND INTERFACE 3. WRITE A SQL QUERY TO GET SECOND HIGH SALARY FROM SALARY TABLE. 4. What is index in SQL server 5. Define primary key, foreign key and unique key 6. Mvc lifecycle 7. Routing

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OOPS concepts include inheritance, polymorphism, encapsulation, and abstraction
Abstract classes cannot be instantiated while interfaces cannot have implementation
SQL query to get second highest salary: SELECT MAX(salary) FROM table_name WHERE salary < (SELECT MAX(salary) FROM table_name)
Index in SQL server is a data structure that improves the speed of data retrieval operations
Primary key uniquely identifies a record, foreign key establishes a relationship between tables, and unique key ensures uniqueness of a column
MVC lifecycle includes request routing, controller instantiation, action execution, and view rendering
Routing is the process of matching a URL to a specific action in the application

1. OOPS CONCEPTS 2. DIFFERENCE BETWEEN ABSTRACT AND INTERFACE 3. WRITE A SQL QUERY TO GET SECOND HIGH SALARY FROM SALARY TABLE. 4. What is index in SQL server 5. Define primary key, foreign key and unique key 6. Mvc lifecycle 7. Routing

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