Object –Objects in JavaScript are like key-value pairs. let company = { name: “Intellipaat”, employees: 200 }; 4. State the difference between var, let, and const. Early Javascript had only ‘var’ keywords to declare variables. Variables declared as ‘var’ are globally scoped or fu...
Here’s an updated list of top Java interview questions and answers that’ll help you in Java interviews. Top Java Interview Questions and Answers – Set 1 1) Define class in Java? In Java, a class is a template used to create objects and define their data type of them. It acts as ...
Collections are used in every programming language and initial java release contained few classes for collections: Vector, Stack, Hashtable, Array. But looking at the larger scope and usage, Java 1.2 came up with Collections Framework that group all the collections interfaces, implementations and alg...
Java C# In this article General Development Java runtime and OS versions Deployment Show 2 more Note The Basic, Standard, and Enterprise plans entered a retirement period on March 17, 2025. For more information, see the Azure Spring Apps retirement announcement. The Standard consumption and...
13) What is the parent class of exceptions in Java? The root class is Throwable, and has two main subclasses: Exception and Error. 14) What is the difference between function and procedure in SQL? A function returns a single value that, as it were, becomes an element in queries. A pro...
An Inversion of Control(IOC) container is a core concept in the Spring framework that manages the creation and life cycle of objects. It allows the framework to control the flow of application execution by injecting dependencies into objects rather than the objects creating their dependencies. The...
Optional:Optional is a final Class introduced as part of Java SE 8. It is defined in java.util package. It is used to represent optional values that are either exist or not exist. It can contain either one value or zero value. If it contains a value, we can get it. Otherwise, we ...
Java exception class hierarchy diagram overview: What is the difference between Exception and Error? In Java, all exceptions have a common ancestorjava.langpackageThrowableclass.ThrowableThe class has two important subclasses: Exception: Exceptions that can be handled by the program itself can be caugh...
The equals method is used to check whether two objects are same or not. It needs to be overridden if we want to check the objects based on property.For example, Employee is a class that has 3 data members: id, name and salary. But, we want to check the equality of employee object ...
Java Platform 1 . Why is Java so popular? 2 . What is platform independence? 3 . What is bytecode? 4 . Compare JDK vs JVM vs JRE 5 . What are the important differences between C++ and Java? 6 . What is the role for a classloader in Java?