Related Topics JAVA Programming Question 7 Can you explain the difference between Stack and Queue in Java? Answer Both Stack and Queue are data structures in Java that allow you to store and retrieve elements, but they have some key differences. Ordering: Stack follows a last-in-first-out (LIFO) ordering, which means that the last element added […]
Related Topics JAVA Programming Question 1 What is the Collections framework in Java? Answer The Collections framework in Java is a set of classes and interfaces that provide a unified and standardized way of representing and manipulating groups of objects. It is part of the Java API (Application Programming Interface) and is included in the
Related Topics JAVA Programming Question 34 Can you explain the use of java.lang.StringIndexOutOfBoundsException class in Java programming? Answer The java.lang.StringIndexOutOfBoundsException class in Java is a runtime exception that indicates that an index or a range of indices is out of bounds for a given String. It is a subclass of the IndexOutOfBoundsException class. This exception
Related Topics JAVA Programming Question 29 What is the difference between Error and Exception in java.lang package? Answer In Java, errors and exceptions are both subclasses of the Throwable class, but they have different purposes and are used in different scenarios. An Error is a subclass of Throwable that represents an unrecoverable condition that should
Related Topics JAVA Programming Question 23 What is the purpose of java.lang.Objects class in Java programming? Answer The java.lang.Objects class was introduced in Java 7 and provides utility methods for performing various object-related operations. Some of the main purposes of the class are: To provide null-safe operations for comparing, hashing, and retrieving the string representation
Related Topics JAVA Programming Question 16 How does the hashCode() method work in java.lang.Object class? Answer The hashCode() method in the java.lang.Object class returns a hash code value for the object on which it is invoked. This method returns an integer value that represents the object’s memory address in the JVM’s heap memory. The hashCode()
Related Topics JAVA Programming Question 8 How does the clone() method work in java.lang.Object class? Answer The clone() method in the java.lang.Object class is used to create a new object that is a copy of an existing object. The general syntax for using clone() is: Object obj1 = new Object(); Object obj2 = obj1.clone(); To
Related Topics JAVA Programming Question 1 What is java.lang package and what is its significance in Java? Answer The java.lang package is a core package in Java that contains fundamental classes and interfaces that are automatically imported into every Java program. This package provides basic functionality for Java programs and includes classes for working with
Related Topics JAVA Programing Question 23 How do you handle null and empty Strings in Java, and what is the difference between them? Answer In Java, a null String is a reference to a String object that does not point to any memory location, while an empty String is a String object that has a
Related Topics JAVA Programming Question 18 Can you explain the use of the toLowerCase and toUpperCase methods in Java for converting a String to lowercase or uppercase? Answer The toLowerCase() and toUpperCase() methods in Java are used to convert the characters in a string to lowercase or uppercase, respectively. Here’s an example of using the
