Unified Infotech Interview Questions, Process, and Tips

SQL query is used to retrieve data from a database management system.

• Use SELECT statement to retrieve data from a table

• Use WHERE clause to filter results based on a condition

• Use JOIN to combine data from multiple tables

Time complexity of loops like forEach, map etc is O(n) where n is the number of elements in the array.

• Time complexity of forEach, map, filter, and reduce functions in JavaScript is O(n) where n is the number of elements in the array.

• These functions iterate through each element in the array once, resulting in a linear time complexity.

• For example, if an array has 10 elements, the time complexity of forEach, map, filter, ...read more

Reverse routing in Laravel is the process of generating URLs based on route names.

• Reverse routing helps in generating URLs dynamically without hardcoding them in the application.

• It allows developers to easily change the URL structure without affecting the codebase.

• Example: route('profile') will generate the URL for the 'profile' route.

• Example: route('user.show', ['id' => 1]) will generate the URL for the 'user.show'

Laravel prevents SQL Injection by using parameter binding and prepared statements.

• Laravel uses parameter binding to automatically sanitize user input before executing SQL queries.

• Prepared statements are used to separate SQL code from user input, preventing malicious SQL injection attacks.

• Eloquent ORM in Laravel also helps prevent SQL injection by automatically escaping input values.