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Computers Articles
Page 96 of 100
Is the popular saying 'Everything is an object in Java' true?
Although it is based on C++, Java is more of a “pure” object-oriented language. In Java, everything extends into an Object class. It means the coding is mostly wrapped in Java objects. The Java language assumes that you want to do only object-oriented programming.You cannot code anything in Java without declaring classes and objects.For example, if you have to say a small sentence "Hello World", it should be declared as a class:class HelloWorldApp { public static void main(String[] args) { System.out.println("Hello World!"); // Display the string. } }Because more than 90% of coding involves objects, ...
Read MoreControl unit and CPU
During the execution of a program, the control unit fetches one instruction at a time from the main memory and then executes it. In this execution process, it takes help of ALU, if the instruction execution involves arithmetic or logical operation (like AND, OR, Ex-OR). After execution of the current instruction, the CPU fetches the next instruction for execution. This process continues until the program is completed and the result is output using the output device. In many computers, the control unit and the ALU are integrated into a single block, known as Central Processing Unit (CPU).Central Processing Unit (CPU) consists ...
Read MoreComputers Input/Output Ports
CPU and the main memory are having speed faster compared to the electromechanical input or output devices like printers, mouse etc. In such a case it is essential that the data lines of the computer should not kept engaged for a long time during communication with input/output (I/O) devices. Otherwise as an effect, the overall speed of the computer system comes down drastically. So I/O devices are connected to a computer through I/O ports.For example, to get a document printed by the printer, phase wise printer will get required information from the CPU to carry out the printing process. After ...
Read MoreMicrocomputer Basics
A microcomputer can be defined as a small sized, inexpensive, and limited capability computer. It has the same architectural block structure that is present in a computer. Present-day microcomputers are having smaller sizes. Nowadays, they are of the size of a notebook. But in coming days also their sizes will get more reduced as well. Due to their lower costs, individuals can possess them as their personal computers. Because of mass production they are becoming still cheaper. Initially in the earlier days they were not very much powerful. Their internal operations and instructions were very much limited and restricted. But ...
Read MoreMicrocontroller Basics
A Microcontroller is a small and low-cost microcomputer, which is designed to perform the specific tasks of embedded systems like displaying microwave’s information, receiving remote signals etc.The general microcontroller consists of the processor, the memory (RAM, ROM, EPROM), Serial ports, peripherals (timers, counters) etc.Types of MicrocontrollersMicrocontrollers are divided into various categories based on memory, architecture, bits and instruction sets. Following is the list of their typesBit − Based on bit configuration, the microcontroller is further divided into three categories.8-bit microcontroller − This type of microcontroller is used to execute arithmetic and logical operations like addition, subtraction, multiplication division, etc. For ...
Read MoreWhat is the difference between a white box, black box, and gray box testing?
When you develop a web application, before hosting to the web, testing is very important to prevent the hackers. There are three types of tests, Black, gray and white box tests which are conducted to ensure that an attacker cannot reach your application code.White Box (or glass box) testingWhite Box (or glass box) testing is the process of giving input code to the system and checking how the system processes it how the output is generated using that code. This is the test where the team tests the internal logic of the code written.It is the process of checking how ...
Read MoreWhich Storage drive is better, SSD or HDD?
A great many people now purchase laptops for their processing needs and need to settle on the choice between getting either a Solid State Drive (SSD) or Hard Disk Drive (HDD) as the storage component. So which of the two is the better decision, an SSD or HDD?There's no straightforward response to this question; every buyer has different necessities and we need to evaluate our choice in light of those requirements, your preferences and obviously the cost.Despite the fact that the cost of SSDs has been falling, the cost per gigabyte advantage is still firm with HDDs. However, in the ...
Read MoreWhat is the easiest way to transfer files from phone to PC?
This question occurs in our minds when we have to transfer files and all old methods start giving us enough troubles. The one way is to synchronize your phone with the USB cable, but you cannot carry the cable everywhere. You can transfer your data through email or other conventional methods, but again these tricks come with a lot of mess. However, you can get this done through some easy tools mentioned here:Push BulletYou can connect your phone and PC completely with the help of this tool, which also gives you a feeling that both your device and PC are ...
Read MoreHow does the 'off-the-record' chat option of Gmail work? Can these messages be retrieved?
One of the features in Google hangouts ensures that no record of your chat history is stored. To enable this, you simply have to go to −Hangouts> Open any conversation> Go to Setting> check for the option 'Conversation History'> Uncheck the box placed in front of this option>Checked: History is turned on.Unchecked: History is turned off.Now the answer to your another question on retrieving the messages is that 'You, as a user' cannot retrieve; however, your employer, in case you use a shared network, can not only see but retrieve even from 'off' mode. Although, I know that Gmail claims ...
Read MoreHow can I turn on error information in my Web Browser?
The most basic way to track down errors is by turning on error information in your browser. By default, Internet Explorer shows an error icon in the status bar when an error occurs on the page.Double-clicking this icon takes you to a dialog box showing information about the specific error that occurred.Since this icon is easy to overlook, Internet Explorer gives you the option to automatically show the Error dialog box whenever an error occurs.To enable this option, select Tools → Internet Options → Advanced tab. and then finally check the "Display a Notification About Every Script Error" box option ...
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