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There could be numerous interview questions on Constructors, it is not possible to cover all in just one article. However, we have researched and assorted the most popular Java interview questions on Constructors. In most of the Java interviews, the interviewers always start by asking basic questions. They can test one's knowledge in just a few minutes of the interviews. Therefore, it is essential to get thorough with the fundamental concepts of Java such as class, object and constructor. In Java interviews, the first question one might encounter is to define constructors. So, let's start our discussion with this question. ... Read More
We can create a grid of subplots by using plt.subplot() or plt.subplots() methods in python Matplotlib . 'subplots' refers collection of multiple plots within a single figure, where each subplot is an axis object. We can create multiple subplots by seting the spine visibility false out of multiple axes. Plotting grids across subplots Steps involved to plot grids across the subplots are follows. Setting parameters for figure Creating ... Read More
In PHP, the 'exec()' or 'shell_exec’ function can be used. It can be executed via the shell and the result can be returned as a string. It returns an error if NULL is passed from the command line or returns no output at all. 'exec()' Function The exec function is used for executing commands in the shell and command line of an external program and optinally capture the last line of the output. Syntax exec(string $command, array &$output = null, int &$return_var = null); 'shell_exec()' Function The shell_exec is similiar to exec but it captures and return the ... Read More
We can click on a link on page with the help of locators available in Selenium. Link text and partial link text are the locators generally used for clicking links. Both these locators work with the text available inside the anchor tags. Link Text: In Selenium a link text is used to hyperlinks on a web page, to create the hyperlinks on a webpage, we can use anchor tag followed by link Text. ... Read More
We can click a button with Selenium Webdriver in Python using the click() method. First, we have to identify the button to be clicked with the help of any locators like id, name, class, XPath, tagname, or CSS selector. Then we have to apply the click() method on it. Common Approaches Two common methods for clicking a Selenium button in Python are using locators such as Xpath and with JavaScript Executor. Using X_path Locator: The attribute which is used to locate the button with the text ... Read More
To select last child with a specific class using CSS is a simple process using CSS psuedo-class selectors. In this article, we will understand three different approaches to select last child with a specific class using CSS. We are having four div elements in our HTML documnet, our task is to select the last child with a specific class using CSS. Approaches to Select Last Child using CSS Here is a list of approaches to select last child with a specific class using CSS which we will be discussing in this article with stepwise explaination and complete example codes. ... Read More
Programming a slideshow using HTML and CSS, we should have a basic understanding of HTML and CSS animations. Slideshow displays a series of content in a sequential manner with smooth transitions. In this article, we will discuss how to create a slideshow using HTML and CSS without using JavaScript. We are having a set of div elements having textual content or images as slides. Our task is to program a slideshow using HTML and CSS. Steps for Programming a Slideshow with HTML and CSS We will be following a two step process for programming a slideshow with HTML and CSS ... Read More
You can handle and manipulate date and time values within a database using SQL queries. You need to filter records based on date comparisons, like checking if a date is greater than today. We will query this using our own sample data as given below. Date Comparisons You can use various comparison operators, like >, =, and CURRENT_DATE; Here, date_column is the field containing the date values you want to compare. “CURRENT_DATE” is a keyword in SQL that represents the current date. Example Consider you have created a table named EVENTS using the CREATE TABLE statement as ... Read More
Problem Statement Extraction of the month as an integer from a date object is an essential skill for developers. This is because you may encounter a task that requires you to generate monthly reports, filter date by month, and schedule events among other similar tasks. In this article, we will attempt to familiarize ourselves with Java’s robust date and time API. Prerequisite Let us dive right into the Java task at hand by ensuring you consider the following points. Ensure you are familiar with basic Java syntax, the date and time API especially. You will work with the syntax like the ... Read More
Ever wonder how data processing companies manage huge datasets effectively? Partitioning is a key method employed in this. We'll explore the idea of partitioning in PySpark in this blog article with a particular emphasis on partitioning using a list by several columns. We'll break down the process step-by-step so that even a beginner can understand it.IntroductionIn today's world of big data efficiently processing and managing large datasets is critical. An effective solution for managing such jobs is Apache Spark, and more especially PySpark (the Python API for Spark). "Partitioning" is one of the best strategies to maximize PySpark's query speed ... Read More