Huron Senior Analyst Interview Questions and Answers

Joins are used in databases to combine rows from two or more tables based on a related column between them.

• Joins are used to retrieve data from multiple tables based on a related column between them

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• INNER JOIN returns rows when there is at least one match in both tables

• LEFT JOIN returns all rows from the left table and the matched rows from th...read more

Order of execution concept refers to the sequence in which instructions are executed in a program.

• Instructions are executed in the order they appear in the code unless specified otherwise.

• Some programming languages have specific rules for order of execution, such as PEMDAS in mathematics.

• Understanding order of execution is crucial for debugging and optimizing code.

• Example: In Python, arithmetic operators follow the PEM

Nulls are placeholders for missing or unknown values in a database.

• Nulls represent the absence of a value in a database field.

• Nulls are different from empty strings or zero values.

• Nulls can cause issues in database queries if not handled properly.

• Nulls can be used to indicate missing data or unknown values.

• Nulls can be replaced with default values or handled using functions like COALESCE.