When you're first starting out in computer science, it can be hard to balance your studies with everything else going on in life. It can be tempting to take shortcuts or risk making mistakes because computers can fix them. However, these 8 mistakes are surefire ways to make certain that you won't have a job when you graduate.

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Common Computer Science Mistakes. Watch this Amazing Video

Not learning a programming language

People often mistakenly think that they don't need to learn a programming language in order to be a programmer. While this is not strictly true, learning a programming language will definitely help you become a better programmer.

Using static methods

Static methods are a powerful tool in the programmer's arsenal, as they allow code to be read and written in a consistent manner. However, they can also be a source of confusion for developers new to the language. In this article, we'll discuss the benefits and pitfalls of static methods, and provide some tips for using them correctly.

Benefits of static methods

Static methods offer several advantages over other forms of code organization. First, they make code more readable by providing a single entry point for all code that uses the method. This makes it easy to follow the flow of execution and troubleshoot errors. Second, static methods are easier to test because there is no need to instantiate objects or call functions from within the test code. Finally, static methods can be used to encapsulate common functionality within a class, making it easier to reuse throughout an application.

However, static methods have their own set of disadvantages as well. First, they can obscure details about how an object works due to their lack of dependency on instance variables. This can lead to confusion when trying to understand how an object works or change its behavior. Second, because static methods do not invoke any functions on objects passed into them, they are less efficient than invoking regular functions on objects. Finally, since static Methods don't access instance variables directly, they cannot readily access private data nested inside objects.

To use static methods effectively, developers should familiarize themselves with both their benefits and drawbacks before

Throwing exceptions as errors

As a developer, you likely know how to code. Unfortunately, that doesn't mean you automatically avoid making common mistakes. In fact, according to Stack Overflow Survey 2016, throwing exceptions as errors is one of the most common computer science mistakes people make.

Throwing exceptions can often lead to unexpected and unintended behaviors in your software. For example, if you're writing a program that asks users for input, and they enter an invalid value, your software might throw an exception and exit prematurely – without asking them for their input again. This could be frustrating for the user and could result in negative reviews on your product's page.

There are other potential consequences of throwing exceptions too. For example, if you're trying to debug a problem with your software, and you throw an exception instead of using standard debugging techniques (like printing out the values of variables), it might be difficult to figure out what's going on.

So why do so many developers rely on throwing exceptions as their go-to error mechanism? Well, it can be easy to get caught up in the excitement of coding and forget about the potential consequences of what you're doing. Additionally, some programming languages (like Java) require users to throw exceptions in order to signal that something went wrong – which can make debugging difficult if you don't know how to do it correctly.

If you're concerned about the consequences of using thrown exceptions in your codebase, there are several things you can do to mitigate

Deleting variables without cleaning them

There are a few steps that you can take in order to avoid making common computer science mistakes. The first step is to be aware of the different types of mistakes that you can make. Second, be sure to clean your variables before deleting them in order to avoid obscuring your code's meaning. Finally, use caution when working with constants as they can also contain sensitive information.

Writing loops that never end

The most common computer science mistakes that people make are the result of writing loops that never end. Loops are a basic building block of programming, but they can be easy to misuse if you don't understand their properties.

A loop is simply a series of instructions that are executed over and over again. In most cases, a loop will have a certain condition that needs to be satisfied in order for it to continue execution. For example, let's say you have a program that prints the numbers from 1 to 100 onscreen. The program might look like this:

for i in range(1,100): print("Number %d",i)

This code will run through each number from 1 to 100, and then print it out onscreen. Notice how the for loop has a condition - in this case, i needs to be equal to or greater than 50 in order for it to continue executing. This condition is enforced by the curly brackets surrounding i in the for statement. If i is less than 50, then the loop won't execute anything and will just jump right back to the top of the loop.

One important thing to keep in mind when writing loops is that they should always have an exit point. This means that once the condition inside the loop has been met, the code inside should stop executing and move on to the next line. In our example above, we'd want our program to stop printing once it reached 101 - this is easily done

Forgetting to use the Parentheses

If you're like most computer science students, you've probably made at least one mistake during your academic career. Here are the three most common ones: forgetting to use parentheses, not indenting code properly, and using the wrong type of variable.

Forgetting to use parentheses is the most common mistake students make in code. When there are multiple expressions inside a single set of parentheses, the code will run more quickly because the compiler can figure out which expression should be executed first.

Not indenting code properly can also cause problems. If your code is unindented by four spaces, then the compiler will place all source code inside of curly braces {} instead of on individual lines. This makes it difficult to understand what each line does and can lead to errors when you try to change or add code later on.

Lastly, using the wrong type of variable can also lead to problems. For example, if you're trying to store a number in a string variable, you'll get an error message because strings cannot hold numbers. Try storing your numbers in int or float variables instead.

Not making sure your code works before releasing it to the public

Your code should be tested before release in order to ensure that it works as expected. This means running different scenarios and making sure all the inputs are correct. If you can't test it yourself, find a friend or colleague who can, and ask them to check your code for you.


It's no secret that computer science can be a difficult and challenging field. But it's also important to keep in mind that there is no one right way to do things – even if you're aiming to become a professional programmer. Hopefully, by learning about these mistakes, you'll be able to avoid them in the future. Thanks for reading!

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