Linear Data StructuresA Linear data structure have data elements arranged in sequential manner and each member element is connected to its previous and next element. This connection helps to traverse a linear data structure in a single level and in single run. Such data structures are easy to implement as computer memory is also sequential. Examples of linear data structures are List, Queue, Stack, Array etc.Non-linear Data StructuresA non-linear data structure has no set sequence of connecting all its elements and each element can have multiple paths to connect to other elements. Such data structures supports multi-level storage and often ... Read More

JPEG and PNG both are a type of image format to store images. JPEG uses lossy compression algorithm and image may lost some of its data whereas PNG uses lossless compression algorithm and no image data loss is present in PNG format.Following are the important differences between JPEG and PNG.Sr. No.KeyJPEGPNG1Stands forJPEG stands for Joint Photographic Experts Group.PNG stands for Portable Network Graphics.2Compression Algorithm typeJPEG uses lossy compression algorithm.PNG uses lossless compression algorithm.3Image QualityJPEG image may lose some image data causing quality loss.PNG image is of high quality.4Image sizeJPEG image is generally smaller than PNG image of same image.PNG image ... Read More

In a computer system, several types of secondary storage devices like HDD, CD, DVD, etc. are used to store permanent data and information. These devices can be categorized into two types namely – magnetic memory and optical memory. A magnetic memory like HDD consists of circular disks made up of non-magnetic materials and coated with a thin layer of magnetic material in which data is stored. On the other hand, optical disks are made up of plastic and consist of layers of photo-sensitive materials in which the data is stored using optical effects. A major advantage of the magnetic disk ... Read More

Both Primary Key and Candidate key are used to get records from tables. These keys are also used to create relationships between tables. Both primary keys and candidate keys are used to identify the records uniquely in a table. Read this article to find out more about primary keys and candidate keys and how they are different from each other. What is a Primary Key? A primary key helps us to uniquely identify a record in a relational database. a primary key is a unique identifier for each record or row of data. It ensures that no two records ... Read More

Volatile memory and non-volatile memory are two distinct types of computer memory with significant differences in terms of their functionality and data storage characteristics. Volatile memory is used for temporary storage and loses its data when the power is removed, while non-volatile memory is used for permanent or long-term storage and preserves data even when the power is off. What is Volatile Memory? Volatile memory is a type of computer memory that requires a continuous power supply to retain data. This means that when the power is turned off or interrupted, the data stored in volatile memory is lost. The ... Read More

Both RAM and HDD are types of computer memory. RAM is used to store computer programs and data that the CPU needs in real time. RAM data is volatile and is erased once the computer is switched off. HDD, hard disk, has permanent storage and it is used to store userspecific data and operating system files. HDD data is static and remains in the computer even if computer is switched off. Read this article to find out more about RAM and HDD and how they are different from each other. What is RAM? RAM stands for Random Access Memory. ... Read More

When the word cloud comes to our mind, we think of big white fluffy fantasy. But technically, cloud is the big white hard drive which stores bulky servers and all your information. It’s cool to think how someone else is managing everything and put the data whenever and wherever you want to store.Security might be an issue, you want to consider. But it’s nothing compared to the scary thought of cloud service going down. According to ACM article, regular bugs were pointed in seven coding constructs of the function calls, assignments, conditions, pointers, uses of NULL, variable declaration, function declaration ... Read More

The data that a user enters into multiple pages of a website can be saved using a combination of cookies and sessions. Cookies and sessions are both vitally important since they record the data that the user has provided for a variety of purposes.Cookies and Sessions are used to store information. Cookies are only stored on the client-side machine, while sessions get stored on the client as well as the server.Read through this article to find out more about cookies and sessions and how they are different from each other.What is a Cookie?Cookies are little text-based files that are kept ... Read More