BYLD Group Interview Questions and Answers

C++ is a compiled language with pointers and memory management, while Java is an interpreted language with garbage collection.

• C++ is faster than Java due to direct memory access.

• Java is platform-independent, while C++ is platform-dependent.

• C++ supports multiple inheritance, while Java only supports single inheritance.

• Java has built-in support for multithreading, while C++ requires external libraries.

• C++ allows for manual memory management, while Java uses automatic garbage co...read more

Java doesn't support multiple inheritance to avoid diamond problem and complexity.

• Java supports single inheritance to promote simplicity and avoid ambiguity.

• Multiple inheritance can lead to the diamond problem where a class inherits from two classes with a common parent.

• Java provides interfaces to achieve multiple inheritance of type without the diamond problem.

• Example: class A and class B both have a method with the same name, if a class C inherits from both A and B, it will...read more

Wrapper class is a class that wraps a primitive data type to provide additional functionality.

• Wrapper classes are used to convert primitive data types into objects.

• They provide methods to convert between primitive types and objects.

• Wrapper classes are immutable.

• Examples include Integer, Double, and Boolean.

A constructor is a special method that is used to initialize objects in a class.

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

• They are called automatically when an object is created.

• They can take parameters to initialize the object's properties.

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

• Constructors can be overloaded to provide multiple ways to initialize an object.

Polymorphism is the ability of an object to take on many forms.

• Polymorphism allows objects to be treated as instances of their own class or as instances of their parent class.

• It enables the use of a single interface to represent multiple types of objects.

• Examples include method overloading, method overriding, and interfaces in Java.

• Polymorphism is a key concept in object-oriented programming.

Java is a high-level, object-oriented programming language used for developing desktop, web, and mobile applications.

• Java is platform-independent and can run on any operating system

• It is known for its security features and is widely used in enterprise applications

• Java code is compiled into bytecode which can be run on a Java Virtual Machine (JVM)

• Popular frameworks and libraries in Java include Spring, Hibernate, and Apache Struts