Recent Posts
Title | Description | Creator | created |
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What are the trade-off choices between performance and security? | A trade-off decision that many solution architects struggle to make is what requirements to compromise if security and performance requirements conflict? Something which I saw many times in my long career. One point of view is that good user experience is linked primarily to the performance of the system since it does make sense to provide good functionality but without a responsive system. On the other hand, some architects would see that providing a maximum level of security would give a better user experience. This may be true, but have they considered system performance while adding all security measures? | Dr. Osama M. Khaled | Sep 22, 2020 10:45 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 |
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 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 |
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 |
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 |
About | Dr. Osama M. Khaled | Aug 14, 2022 03:19 AM | |
Postal Rates | Data are often presented in tables, with information organized in rows and columns. This exercise will give you the basic concepts of reading a table to find a piece of information. | Dr. Osama M. Khaled | Oct 02, 2023 07:35 AM |
Use the multiplication poperty of quality | Multiplying both sides of an equation by the same nonzero number does not change its solution. | Dr. Osama M. Khaled | Sep 29, 2023 07:32 PM |
Multiply fractions | To multiply two fractions, multiply the numerators and multiply the denominators. Simplify the result, if possible | Dr. Osama M. Khaled | Sep 21, 2023 02:26 AM |
Use the subtraction property of equality | Subtracting the same number from both sides of an equation does not change its solution | Dr. Osama M. Khaled | Sep 20, 2023 08:53 PM |
Exercise 2: Concepts | Practice the essential concepts to simplify algebraic expressions | Dr. Osama M. Khaled | Sep 20, 2023 11:45 AM |
Identify corresponding angles, interior angles, and alternate interior angles | A line that intersects two coplanar lines in two distinct (different) points is called a transversal | Dr. Osama M. Khaled | Sep 18, 2023 11:22 AM |
Identify and define parallel and perpendicular lines | Parallel lines are not intersecting while perpendicular lines are intersecting and form a right angle | Dr. Osama M. Khaled | Sep 17, 2023 11:24 AM |
Equivalent Fractions | Fractions can look different but still represent the same part of a whole. | Dr. Osama M. Khaled | Sep 15, 2023 11:28 PM |
Round whole numbers | When we don’t need exact results, we often round numbers | Dr. Osama M. Khaled | Sep 14, 2023 06:01 AM |
Use the addition property of equality | Adding the same number to both sides of an equation does not change its solution. | Dr. Osama M. Khaled | Sep 13, 2023 04:08 AM |
Exercise 1: Vocabulary | Practice some essential vocabulary when you simplify algebraic expressions | Dr. Osama M. Khaled | Sep 12, 2023 11:46 PM |
Determine whether a number is a solution | An equation is a statement indicating that two expressions are equal | Dr. Osama M. Khaled | Sep 12, 2023 07:03 AM |
Exercise 6:Translate to algebraic expression | Abstract the words into concrete algebraic expressions | Dr. Osama M. Khaled | Sep 11, 2023 08:13 PM |
Exercise 1: Guided Practice | An exercise showing how percents could be used in practical situations | Dr. Osama M. Khaled | Sep 11, 2023 05:50 AM |
Write fractions as percents | We use a two-step process to write a fraction as a percent. First we write the fraction as a decimal. Then we write that decimal as a percent. | Dr. Osama M. Khaled | Sep 09, 2023 01:00 AM |
Write decimals as percents | To write a percent as a decimal, we drop the % symbol and move the decimal point 2 places to the left. To write a decimal as a percent, we do the opposite: we move the decimal point 2 places to the right and insert a % symbol. | Dr. Osama M. Khaled | Sep 08, 2023 02:09 AM |
String Processing | String processing algorithms have been important for computer science for a long time in conjunction with computer languages and compiling issues. | Dr. Osama M. Khaled | Sep 07, 2023 11:36 PM |
Searching | The searching problem deals with finding a given value, called a search key, in a given set (or a multiset, which permits several elements to have the same value). | Dr. Osama M. Khaled | Sep 07, 2023 12:30 AM |
Sorting | The sorting problem is to rearrange the items of a given list in nondecreasing order | Dr. Osama M. Khaled | Sep 04, 2023 06:31 AM |
Write percents as decimals | To write a percent as a decimal, recall that a percent can be written as a fraction with denominator 100 and that a denominator of 100 indicates division by 100 | Dr. Osama M. Khaled | Sep 02, 2023 08:26 PM |
Internet of Things Overview | The Internet of Things (IoT) encapsulates a vision of a world in which billions of objects with embedded intelligence, communication means, and sensing and actuation capabilities will connect over IP (Internet Protocol) network. | Dr. Osama M. Khaled | Aug 29, 2023 03:07 AM |
Organizational Challenges | Cloud services impact organizations in subtle ways. The cloud impacts the whole company, not just the IT department | Dr. Osama M. Khaled | Aug 28, 2023 06:41 AM |
Atoms, Molecules, and Ions: Exercises | Test your knowledge in atoms, molecules and Ions | Dr. Osama M. Khaled | Aug 23, 2023 03:27 AM |
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