The Hadoop framework is open-source that has the ability to expand computation and storage. A spread environment across a host of computers lets you store and process big data. As an alternative, Spark is an open-source clustering technology. It was designed to speed up computing. This product enables whole program clusters that are fault tolerant and implicitly parallel. The prime characteristic of Spark is in-memory cluster computing, which improves an application's speed. These technologies have some similarities and differences, so let's briefly discuss them. What is Hadoop? In the year of 2006, Hadoop began as a Yahoo project. ... Read More

Have you ever faced the situation of extending a string or char array? If you haven't yet, you might probably encounter this situation in the future. It is a common practice to append a single character to a string or char array in Java. The significant difference between a string array and a char array is that a string array is a sequence of characters, and a char array is a sequence of collection of data type char. String array runs as a single entity, whereas char array runs as a separate entity. In this blog, we will look ... Read More

Are you a fresher or final-year graduate looking to start your career as a Java developer? Have you already landed as a java developer and are looking to prepare for the next company? If you say "Yes" to any of these questions, then you are at the right place. In this article, you will come across the top resources and websites that will help you to prepare and do well in java programming interviews. The list includes popular online platforms and websites like Tutorialspoint, StackOverflow, DZone, etc., where you can learn frequently asked java questions in top companies' interviews and ... Read More

Vacuum tube and Transistor are types electronic switching devices used a variety of electronic devices and circuits such as computers, communication systems, power supplies, TV, radios, amplifiers, etc. However, both are significantly different from each other based on their technology and operation. In this article, we will highlight all the points that differentiate a vacuum tube from a transistor. Let's start with some basics of vacuum tubes and transistors. What is a Vacuum Tube? A vacuum tube is an electronic device used to control the current flowing in a circuit using a vacuum in a sealed glass tube. Basically, ... Read More

In every electrical system, we need to measure various electrical quantities such as current, voltage, power, energy, etc. For this purpose various types of measuring instruments have been developed to measure the respective quantity. Go through this article to find out more about wattmeter and energy meter. We also learn about the significant differences between a wattmeter and energy meter. One major difference between wattmeter and energy meter is that the wattmeter measures electrical power in the circuit, whereas the energy meter measures total amount of energy consumed by the load.What is a Wattmeter? A wattmeter is an ... Read More

An electric circuit that is used to start an electric motor is called a starter. Depending on the type of electric motor, there are different types of starters available. In this article, we will discuss the basics of three-point starters and four-point starters which are used for DC motor starting. We will also highlight how these two types of starters are different from each other. What is a Three Point Starter? As its name implies, a three point starter (shown in the above figure) is the one which has only three points (or terminals). A typical three point starter ... Read More

A cell is a device which can convert chemical energy into electrical energy. A cell consists of two electrodes and chemical substances inside it. When the cell is connected in a circuit, the chemical reactions take place inside the cell and as a result of these chemical reactions, an electric current flows in the circuit. In this article, we will discuss about galvanic cells and electrolytic cells and how these two types of cells are different from each other.What is a Galvanic Cell?A galvanic cell is an electrochemical cell in which an electric is produced from spontaneous oxidation-reduction reactions.The galvanic ... Read More

An electric motor is an electromechanical energy conversion device which converts the electrical energy input into mechanical energy output in the form of rotation of shaft. Based on the types of electric supply and working, the electric motors are classified in many types such as DC motors, induction motors, synchronous motors, stepper motors, servo motors, and many more. In this article, we will highlight all the major differences between a stepper motor and a DC motor. But, before discussing the differences, let's start with some basics of stepper motor and DC motor. What is a Stepper Motor? A type ... Read More

A circuit breaker is an electrical switching device that can open or close an electric circuit either normally or in case of fault. Therefore, a circuit breaker is one of the major component of an electrical power system or wiring system. A circuit breaker is usually equipped with a control mechanism which enable it to operate automatically in case of abnormal conditions in the circuit. Since the different electrical systems operate at different voltage and current levels. Therefore, according to system voltage and current, there are various types of circuit breakers available such as MCB (Miniature Circuit Breaker), ACB (Air ... Read More

Both servo motor and stepper motor are special electrical machines that can satisfy the basic requirements of a positioning application. Servo motors and stepper motors convert the input electrical energy into angular velocity or movement of the motor shaft. However, there are quite different from each other in the way they operate. In this article, we have highlighted all the differences between servo motor and stepper motor. But, before discussing the differences, let's have some basic information about the servo and stepper motors so that it becomes easier to understand the differences between them. What is a Servo Motor? ... Read More