In Selenium, Chrome options allow you to customize the behavior of the Chrome browser when automating tests. You can set different options such as running Chrome in headless mode, setting window sizes, and configuring the Chrome driver with various preferences and flags. Setting Chrome Options in Selenium To use Chrome options in Selenium, you will […]
Processing a sorted array is often faster than an unsorted array because sorted arrays enable more efficient algorithms and optimizations. For example, operations like searching, range queries, and duplicate removal can take advantage of the order in the sorted data. Unsorted Array Approach (Brute Force) For an unsorted array, the brute force approach would be […]
The behavior of var in Java, introduced in Java 10, does not bypass the protected access restriction in any special way. Instead, the misunderstanding often arises from how var is interpreted and its interactions with visibility rules in Java. Let’s break it down: How var Works The Protected Access Modifier Misinterpretation of var and protected […]
In Java, pattern matching with switch statements or expressions can fail with a compiler error like: 'does not cover all possible input values' This happens because the compiler requires exhaustive coverage of all possible cases for a given type. For InetAddress, which is a non-sealed abstract class, the compiler cannot ensure that all possible subclasses […]
In Java, exceptions are categorized into Checked and Unchecked exceptions. While they differ primarily at compile-time, there are also runtime considerations. Here’s an explanation with examples: 1. Checked Exceptions Definition: Runtime Behavior: Example: import java.io.FileReader;import java.io.IOException;public class CheckedExample { public static void main(String[] args) { try { FileReader file = new FileReader("nonexistentfile.txt"); // Throws FileNotFoundException […]
To match open HTML tags but exclude self-closing XHTML tags using Regular Expressions (RegEx), you can use the following pattern: RegEx Pattern <([a-zA-Z][a-zA-Z0-9]*)(?![^>]*\/>)> Explanation of the Pattern Example HTML Snippet <div> <img src="image.jpg" /> <input type="text" /> <span>Text</span> <br /> <p>Paragraph</p></div> Matches Using the RegEx <([a-zA-Z][a-zA-Z0-9]*)(?![^>]*\/>)>: Code Example JavaScript Example const html = `<div> <img […]
Sealed Classes: Restricts which classes can extend or implement a class/interface.Example: sealed class Shape permits Circle, Rectangle { }final class Circle extends Shape { }final class Rectangle extends Shape { }
Functional Interfaces: An interface with a single abstract method. Used with Lambda Expressions.Example: @FunctionalInterfaceinterface Greeting { void sayHello(String name);}Greeting greet = (name) -> System.out.println("Hello, " + name);greet.sayHello("John");
Streams: Used for processing collections with declarative programming. Supports operations like map, filter, reduce.Example: List numbers = Arrays.asList(1, 2, 3, 4, 5);numbers.stream() .filter(n -> n % 2 == 0) .forEach(System.out::println);
Default Methods: Allows interfaces to have concrete methods with default implementation.Example: interface Vehicle { default void start() { System.out.println("Vehicle is starting."); }}class Car implements Vehicle {}Car myCar = new Car();myCar.start();
