Buck Interview Questions, Process, and Tips

SQL query to find max salary

• Use the MAX() function to find the maximum salary

• Specify the column name for salary in the SELECT statement

• Specify the table name in the FROM clause

• Use a semicolon to end the query

SQL query to find nth max salary

• Use ORDER BY and LIMIT to get the nth max salary

• Use subquery to avoid duplicates in case of ties

• Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT n-1, 1

Interface is a contract that defines the methods a class must implement, while abstract class can have both implemented and abstract methods.

• Interface cannot have method implementations, while abstract class can have both implemented and abstract methods.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Interfaces are used to achieve multiple inheritance in Java, while abstract clas...read more

Spring is a framework for building Java applications. IOC container is a core feature of Spring that manages object dependencies.

• Spring is a popular Java framework used for building enterprise-level applications.

• IOC (Inversion of Control) container is a core feature of Spring.

• IOC container manages object dependencies by creating and managing objects and their relationships.

• It allows loose coupling between objects, maki...read more

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