Hi Reader,

Hope you’re doing well!

Last week, I shared 22 basic coding problems on Numbers and Loops.

If you’ve been practicing them, that’s awesome.

If not, don’t worry - take it at your own pace. The goal is to understand the logic, not rush through.

Now, if you’re comfortable with loops, it’s time to level up a bit: Arrays.

Arrays help you move from working with single numbers to handling multiple values at once. This is exactly the kind of thinking that comes up in QA automation interviews, so it’s worth practicing carefully.

Below are 12 beginner-friendly Array coding problems.

They’re designed to help you build logic, practice loops, and get interview-ready.

Arrays Coding Problems for Beginner QA Engineers

Prerequisite: basic loops and if–else

Array Basics

1) Print all elements of an array

2) Find the sum of all elements in an array

3) Find the largest element in an array

4) Find the smallest element in an array

Searching (Very important for interviews)

5) Linear Search - check whether a given element exists in an array

6) Find the index of a given element using Linear Search

Counting and Validation Logic

7) Count how many even and odd numbers are present in an array

8) Count how many times a given element appears in an array

Sorting (Logic-focused)

9) Sort an array in ascending order using Bubble Sort

10) Sort an array in descending order using Bubble Sort

Common Interview Problems

11) Find the Second Largest element in an array
Example: If your test scores are [55, 78, 90, 67, 82], the largest is 90, and the second largest is 82. Try walking through this with a loop - it’s a small exercise but teaches a lot about comparison logic!

12) Rotate an array by K steps

These problems may look simple, but they help you practice:

• Loop usage
• Index handling
• Conditional logic
• Explaining your approach clearly

All of these are critical skills for QA automation interviews.

You can check solutions on YouTube, Google, ChatGPT, or Gemini - that’s fine.

But make sure you practice in Eclipse or IntelliJ, and focus on understanding the logic, not just copying code.

I have explained similar problems solving with Programming fundamentals on my YouTube channel playlists (Swaroop Nadella) and Udemy courses (Available on Udemy Business as well with employer login for free).

Explore them for learning programming fundamentals first and start your coding practice.

Once you complete these problems:

• Publish your Coding solutions to GitHub
• Share a LinkedIn post about completing this Arrays coding challenge
• Tag me - I’d love to see your progress

Next step, we’ll move to Strings coding problems, which are very common in interviews.

Let's meet in next email

- Swaroop Nadella | LinkedIn​

P.S. I’ll keep sharing short, practical information through this newsletter - no spam, only things that genuinely help QA engineers grow.

You can read my previous email articles published here.