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4 Python Algorithms for Coding Interviews – DataDrivenInvestor

Aug 14
Whether you want to be o Data Scientist, Software Developer, or any position that includes coding, you might be going to face with a Coding challenge.
Learning Coding is like learning a new language. You have to develop a neural path in your mind in that language.
For example, during learning a new language, there are stages.
You have to be proficient in four of that stages to understand clearly and speak fluently.
In python, the schedules, of course, are different.
And many advanced topics.
If you want to speak Python, you have to be proficient in these topics first.
One of the main things to do for me is solve coding challenges. Because that will help you to boost your coding challenge in your Interview too.
Here is 4 website for you to sharpen your coding skills.
If you want to see more details, you can read that article.
Write a code, that will take 9 numbers as an input and turns it into an array, 3×3 shape.
Now after that explanation, almost anytime they either describe or give an explanation about sample Input and sample Output.
1 2 3 4 5 6 7 8 9
Now, let us load the library and take the input.
First, we should split the given input, and second turn them into numbers.
Third, we will change the type as an array.
Fourth, we will reshape that array.
For more Numpy functions;
Now, in this challenge, we will determine the given year, whether it is a leap year or not.
If it will be a leap year the code should return True or return False.
The leap year conditions;
Let me give an example;
Now, it is obvious we will write a function containing if else block.
Before looking for the answer, try to write your own by yourself, it actually is like a game and rather amusing.
For this challenge, 4 blocks of if-elif are needed.
First, if the number can be evenly divided by ;
Prime numbers are whole numbers that have only two dividers: 1 and the number itself.
The first four prime numbers are 2, 3, 5, and 7.
For example, 8 has four dividers: 1, 2, 4, 8.
So we know 8 is not a prime number.
Now, we will write code to check if the numbers in the list are prime numbers or not.
If the numbers are prime, the code should print
* “ ( )is a prime number.”
If the number is not a prime number, it should print
Now to solve this answer we need two loops.
If our first loop can divide our second loop, the number automatically is not a prime because it has a divider, hence we will print;
is not a prime number because { } is a divider of { }.
We should fill the black correctly with the divider and our number.
If our first block does not answer, then our number has not any divider, our second loop checks if a possible divider comes near our number.
Suppose you are a teacher and you add the notes of your student in your dictionary and you want to find the student's name whose grade is over 90.
Select the name in that dictionary item, if the score is greater and equal to 90.
Now, of course, the list goes on and on.
One other tip for you, if you already study one Python library or concept, you can filter the challenges in Hackerrank, then focus on that one.
On the other hand, if you are at the bottom of the ladder, first try to learn all of the pre-requisites that I gave to you as a list in the Intro.
And one additional piece of information comes from my experience if you want to be really good at any one of the programming languages you should write code every day.
In the first days of learning coding days, I really had a struggle doing that but try finding an amusing way to code.
Personal projects and coding websites really help me be consistent.
You should be consistent to build a neural path in your mind, and make repetition.
Repetition is the mother of learning, the father of action, which makes it the architect of accomplishment.” Zig Ziglar
Thanks for reading my article.
“Machine learning is the last invention that humanity will ever need to make.” Nick Bostrom
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