Valuefy Solutions Senior UI Developer Interview Questions and Answers

Joins in SQL are used 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

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

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

Types of arrays in PHP include indexed arrays, associative arrays, and multidimensional arrays.

• Indexed arrays: default type where each element is assigned a numeric index starting from 0.

• Associative arrays: elements are assigned a specific key instead of numeric index.

• Multidimensional arrays: arrays within arrays, creating a matrix-like structure.

• Example: $indexedArray = [1, 2, 3]; $associativeArray = ['key1' => 'value...read more