Bristlecone Interview Questions, Process, and Tips

Indexing is a technique to improve database performance by creating a quick lookup of data.

• Indexing helps in faster retrieval of data from a database.

• It reduces the time taken to search for data in a large database.

• Indexes can be created on one or more columns of a table.

• Examples of indexes include primary key, unique key, and clustered index.

• Indexing can also help in optimizing query performance.

Query to retrieve hierarchical data from a table with parent-child relationship maintained by ID and parent ID.

• Use a self-join to join the table with itself based on the parent ID and ID columns.

• Use a recursive CTE (Common Table Expression) to traverse the hierarchy and retrieve all levels of data.

• Order the results by the hierarchy level to display the data in a hierarchical structure.

Spring Profile is used to configure different environments. Spring Validations is used to validate data.

• Spring Profile allows developers to define different configurations for different environments

• It helps in managing properties like database credentials, logging levels, etc.

• Spring Validations provide a way to validate data before processing it

• It helps in ensuring that the data is in the correct format and meets certa...read more

ORM provides advantages such as increased productivity, improved maintainability, and reduced code duplication.

• ORM eliminates the need for manual SQL queries, reducing development time and increasing productivity.

• ORM provides a higher level of abstraction, making it easier to maintain and modify code.

• ORM reduces code duplication by providing reusable code for common database operations.

• ORM allows for easier database mi...read more

TreeMap and HashMap are both implementations of the Map interface in Java.

• HashMap is faster than TreeMap for most operations, but TreeMap maintains elements in a sorted order.

• HashMap allows null keys and values, while TreeMap does not allow null keys but allows null values.

• HashMap uses hashing to store and retrieve elements, while TreeMap uses a red-black tree.

• HashMap is generally preferred for faster operations, while...read more