SplashBI UI Developer Interview Questions and Answers

Oops concepts in Java

• Encapsulation - hiding implementation details

• Inheritance - reusing code and creating parent-child relationships

• Polymorphism - multiple forms of a method or object

• Abstraction - creating abstract classes and interfaces

• Example: Encapsulation - using private variables and public methods

• Example: Inheritance - creating a subclass that inherits from a superclass

• Example: Polymorphism - using method overloa...read more

Altering columns in databases involves modifying the structure of a table by adding, deleting or modifying columns.

• Use ALTER TABLE statement to modify columns

• Add new columns using ADD COLUMN

• Delete columns using DROP COLUMN

• Modify columns using MODIFY COLUMN

• Changing column data type may result in data loss

Reversing a number in Java

• Convert the number to a string

• Use StringBuilder to reverse the string

• Convert the reversed string back to a number

To extract words from a line in Java, split the line using whitespace as delimiter.

• Use the split() method of String class

• Pass the whitespace regex as argument to split() method

• Iterate over the resulting array to get individual words

C# concepts including abstraction, interface, abstract method, abstract class, polymorphism, encapsulation, inheritance, and serialization.

• Abstraction: hiding implementation details

• Interface: defining a contract for behavior

• Abstract method: method without implementation

• Abstract class: class with one or more abstract methods

• Polymorphism: ability of objects to take on multiple forms

• Encapsulation: bundling data and behavi...read more

Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.

• Inheritance allows for code reuse and promotes modularity.

• The class that is being inherited from is called the superclass or base class.

• The class that inherits from the superclass is called the subclass or derived class.

• The subclass can access the public and protected members of the superclass.

• Inhe...read more

Regular expressions in PHP are powerful tools for pattern matching and manipulating strings.

• Regular expressions are defined using the preg_match() function in PHP.

• They are used to search, replace, and validate strings based on specific patterns.

• Regex patterns consist of a combination of characters and special symbols.

• Modifiers can be added to the pattern to control the matching behavior.

• Common regex functions in PHP in...read more

Polymorphism is the ability of an object to take on many forms. It allows objects of different classes to be treated as the same type.

• Polymorphism allows a single interface to be used for different types of objects.

• It enables code reusability and flexibility in object-oriented programming.

• For example, a parent class 'Animal' can have multiple child classes like 'Dog', 'Cat', and 'Bird'. They can all be treated as 'Anim...read more