Persistent Systems Technical Project Lead Interview Questions and Answers

Code using traditional JavaScript methods

• Use document.getElementById() to access HTML elements

• Use loops like for() and while() for iteration

• Use if() and switch() for conditional statements

• Use functions to encapsulate code and improve reusability

Constructor is a special method that is called when an object is created.

• Constructors have the same name as the class they belong to.

• They are used to initialize the object's state.

• They can take parameters to set initial values.

• If a class does not have a constructor, a default one is provided.

• Example: public class Person { public Person(String name) { this.name = name; } }

Triggers are special stored procedures that are automatically executed in response to certain events or actions in SQL.

• Triggers can be used to enforce business rules and data integrity.

• They can be used to audit changes to data.

• Triggers can be used to replicate data to other tables or databases.

• They can be used to send notifications or alerts based on certain conditions.

• Examples of events that can trigger a trigger incl...read more

Sorting an array of strings without using inbuilt function.

• Implement bubble sort algorithm

• Compare adjacent elements and swap if necessary

• Repeat until no more swaps are needed