Oracle Staff Consultant Interview Questions, Process, and Tips

Dependency injection is a design pattern where components are given their dependencies rather than creating them internally.

• Dependencies are injected into a component through constructor injection, setter injection, or interface injection.

• This allows for easier testing, flexibility, and reusability of components.

• Common frameworks for dependency injection include Spring Framework for Java and Angular for TypeScript.

• Exam...read more

REST API status codes indicate the outcome of an HTTP request.

• 200 - OK: Request was successful

• 404 - Not Found: Resource not found

• 500 - Internal Server Error: Server error occurred

Developed a project management tool for tracking tasks and deadlines.

• Created a user-friendly interface for adding and managing tasks

• Implemented a calendar feature for visualizing deadlines

• Integrated email notifications for task reminders

Right join includes all records from the right table and matching records from the left table, while left join includes all records from the left table and matching records from the right table.

• Right join keeps all records from the right table, even if there are no matches in the left table.

• Left join keeps all records from the left table, even if there are no matches in the right table.

• Example: In a right join between ...read more

A cursor is a database object used to retrieve data from a result set one row at a time.

• Used to fetch and manipulate data row by row

• Improves performance by reducing memory usage

• Can be static, dynamic, forward-only, etc.

• Examples: FETCH, OPEN, CLOSE

A right join returns all records from the right table and the matched records from the left table.

• Use when you want to include all records from the right table, even if there are no matches in the left table.

• Syntax: SELECT * FROM table1 RIGHT JOIN table2 ON table1.column = table2.column;

• Example: SELECT * FROM employees RIGHT JOIN departments ON employees.department_id = departments.department_id;

To find the 2nd max salary, you can use a SQL query with the MAX() function and a subquery.

• Use a subquery to select the maximum salary excluding the highest salary.

• Order the salaries in descending order and select the second row using LIMIT and OFFSET.

• Example: SELECT MAX(salary) FROM employees WHERE salary < (SELECT MAX(salary) FROM employees);