Business Solutions Manager Interview Questions and Answers

Inner join combines rows from two tables based on a related column, while left join returns all rows from the left table and the matched rows from the right table.

• Inner join only includes rows that have matching values in both tables

• Left join includes all rows from the left table, even if there are no matches in the right table

• Example: Inner join would return only customers who have made purchases, while left join would return all customers with or without purchases

Error handling is the process of anticipating, detecting, and resolving errors in a software application.

• Error handling involves identifying potential errors in a program

• It includes implementing mechanisms to handle errors gracefully

• Common error handling techniques include try-catch blocks, logging, and error messages

• Example: Catching a division by zero error and displaying a user-friendly message

Switch case is used for multiple conditions, while if else is used for binary conditions.

• Switch case is more efficient when there are multiple conditions to check

• If else is more suitable for binary conditions

• Switch case can improve code readability in certain scenarios

• If else can be nested for complex conditions

• Example: switch case for days of the week, if else for checking if a number is even or odd