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
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 property of equality
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
AWS Compute Essentials
Practice questions to test your knowledge about AWS compute
Dr. Osama M. Khaled
Aug 24, 2023 04:24 AM
Atoms, Molecules, and Ions: Exercises
Test your knowledge in atoms, molecules and Ions
Dr. Osama M. Khaled
Aug 23, 2023 03:27 AM
Common names of chemical molecules
Some molecules which have some common names
Dr. Osama M. Khaled
Aug 22, 2023 12:04 PM
Molecules and Chemical Nomenclature
By taking this quiz, you should be able to define a molecule, name simple molecules based on their formulas, and determine a formula of a molecule based on its name.
Dr. Osama M. Khaled
Aug 16, 2023 11:01 AM
