Notes with worthy tutorials
Q: What are the different types of operating systems? Briefly describe. Operating systems and computer architecture have had a great influence on each other. As hardware industry started to develop powerful and feature enriched hardware for computers, the operating systems needed to update themselves to harness the power of those hardware. Again, as operating systems … Read more
An operating system is an intermediary program between computer user and the computer hardware. This computer user can also be just another software running on the operating system or another computer or device. So basically, operating systems are computer programs that let other computer programs or humans communicate with the hardware of the computers.
Histogram: The histogram plots the number of pixels in the image (vertical axis) with a particular brightness value (horizontal axis). Considering the following graph, Here the vertical axis is showing the no of pixels and horizontal axis is showing the grey-levels of the image. From this histogram of that image it is found that the … Read more
Brightness: Brightness of an image is defined by the higher grey-scale values. Such as, if an image has grey-scale values like 175,200,255 etc, it can be said that brightness of the image is high. That is, the higher the grey-scale value the higher the brightness of an image. Thus brightness of an image is the … Read more
High Pass Filter: Considering the grey-scale values of a part of an image as below, Here, we have taken 9 grey scale values. It is seen that the 5th value is very different than the other 8 values, that is a big change is occurring at that point due to the big change of the … Read more
Median Filter: Median filter, as the name implies, replaces the center value of a mask with the median of all the values of the mask. Simply taking some grey-scale values of an image and taking a 3×3 mask. Now we have 9 values and the 5th value is the median. Thus, the center value of … Read more
Following is a list of all the question in the section Class Notes: Database Management System. When new class notes will be added, links of those posts will be added to this list too.
Following is a flowchart drawing of Database system architecture.
Database Administrator: One of the main reasons behind using DBMS is to have central control on both data and the applications access those data. The person who has such central control over the data is called a database administrator (DBA). Some of the functions of DBA are given below, Schema Definition: The DBA creates the … Read more
There are about 4 different types of database users differentiated by their way of interaction with the database system. Brief description has been given below, Naive Users: This type of users generally interacts with the system through previously created programs. Such as, a user may use the system to transfer some balance from one account … Read more