Recent Posts

by Dr. Osama M. Khaled last modified 2022-07-24T01:26:40+00:00
Title Description Creator created
Cells Cells Cells and cell theory Dr. Osama M. Khaled May 24, 2022 01:54 AM
History of Geometry Good to know historical information about geometry Dr. Osama M. Khaled May 23, 2022 01:25 AM
Geometry Definitions Some essential definitions in geometry Dr. Osama M. Khaled May 23, 2022 01:17 AM
Cell Structure Definitions Play hangman and get to know more definitions related to cell structure topic Dr. Osama M. Khaled May 18, 2022 12:37 AM
Microscopes Microscopes A microscope is a laboratory instrument scientists use to examine objects that cannot be seen by naked eyes. Dr. Osama M. Khaled May 13, 2022 01:08 AM
Java History You may think that history makes facts. You will be amazed to know Java history. Take the quiz to know more Dr. Osama M. Khaled May 04, 2022 04:57 AM
Accelaration Gaining speed Dr. Osama M. Khaled May 02, 2022 05:19 AM
Speed Speed Speed is a very important concept in physics to explain one of the most important characteristics of moving objects. Dr. Osama M. Khaled Apr 17, 2022 11:49 PM
Matter Basics Test your knowledge about some fundamental concepts in matter Dr. Osama M. Khaled Nov 02, 2021 11:03 AM
Definitions Learn the basic terms to endeavour the journey of Chemistry Dr. Osama M. Khaled Oct 31, 2021 02:01 AM
Introductory concepts in Biology - 3 Dr. Osama M. Khaled Oct 28, 2021 02:28 AM
Introductory concepts in Biology - 2 Dr. Osama M. Khaled Oct 28, 2021 01:55 AM
Introductory concepts in Biology - 1 Dr. Osama M. Khaled Oct 28, 2021 01:41 AM
Percentages Increasing or decreasing by a given percentage Dr. Osama M. Khaled Oct 26, 2021 04:28 AM
Water absorption and transmission Absorption and transmission of water and mineral salts in plants is a very important process for plant survival. How much do you know about it? Dr. Osama M. Khaled Oct 18, 2021 10:20 PM
Plant parts Do you know plant parts? Take this quiz and refresh your knowledge Dr. Osama M. Khaled Oct 16, 2021 12:31 AM
Catalysts Catalysts are very important in industry. They speed up a chemical reaction by lowering the amount of energy you need to get one going. They are the backbone of many industrial processes, which use chemical reactions to turn raw materials into useful products. Dr. Osama M. Khaled Oct 11, 2021 05:02 AM
levers - 2 Levers makes the task perform easily by doing one of the following functions Dr. Osama M. Khaled Oct 08, 2021 02:11 AM
Levers - 1 Levers makes the task perform easily by doing one of the following functions Dr. Osama M. Khaled Oct 08, 2021 12:30 AM
Natural Numbers What do you know about natural number Dr. Osama M. Khaled Oct 07, 2021 01:19 AM
Java Compilation Errors This quiz will help you recognize common compilation errors. Usually, IDEs are powerful enough to capture such errors on the fly. However, it is very important to know them by heart as you may be in a situation using only Javac and you do not want to waste a lot of time Dr. Osama M. Khaled Jun 24, 2021 09:08 PM
Variables and Memory Optimization When you start coding, you need to be mindful to memory usage and leakage. Dr. Osama M. Khaled May 27, 2021 10:40 PM
An efficient way to delete an item from a dynamic list It is sometimes tricky working with linked lists if you are searching for an item to delete it. Dr. Osama M. Khaled May 23, 2021 09:10 PM
Make a phone number callable in Android You may want to present a number and make it callable. Dr. Osama M. Khaled May 23, 2021 11:36 AM
Check if a string has a white space at any position It is important sometimes to check a string and make sure that it does contain a white space (e.g. space, new line, tab, etc ...). Dr. Osama M. Khaled May 21, 2021 12:00 PM
Check if a string is Null or Empty It is sometimes not practical to work out a string object immediately before validating if it is null or not Dr. Osama M. Khaled May 17, 2021 09:58 PM
Java Basics Some fundamental questions about Java that you should know and may be asked during interviews Dr. Osama M. Khaled Jan 07, 2021 04:35 AM
Quadratic Expressions - Expanding Another quiz showing how to do equation expansion Mohamed Osama Dec 18, 2020 12:14 AM
Quadratic Expressions - Expanding Expanding quadratic expressions is very important. It should be very easy as well. Do not be scared. Take the quiz and try it yourself Dr. Osama M. Khaled Nov 21, 2020 05:29 AM
Area of complex shapes These are more into practical questions in real life. We do not find shapes just in simple squares and circles. There are actually different types of shapes compiling basic shapes all in one. Take this quiz and enjoy the challenge Dr. Osama M. Khaled Nov 05, 2020 11:48 AM