Arrays practice questions for placement and internships

Introduction:- 

                                     Welcome to practice coding question of array. In this blog post i will tell you about after completing basics concept of arrays in java, How you can practice arrays  questions. I have selected some classical questions that are important for placement and internships. Arrays are powerful data structures that play a crucial role in solving a variety of programming problems. Whether you're gearing up for a technical interview or just looking to strengthen your coding skills, these practice problems are designed to help you master array manipulation in Java.

Over view of arrays in java:- 

If you don't have basics knowledge of array in java. Then you should watch my video for clear your basics fundamentals.

And if you have basic knowledge of array in java then you can practice these questions which is given below.

Practice Problems:-

* Problem 1:- Two sum

Description:-

                    Given an array of integers nums and integers target. And you have to return target if you will see any sum of two numbers are equal to the target.

Difficulty:- Easy

Link to LeetCode problem:-

Below is the problem link. you can access this link and solve this problem on leetcode.

 https://leetcode.com/problems/two-sum/

* Problem 2:- Largest Number

Description:-

                    Given an array of non-negative integers nums and you have to find largest element and return it.

Difficulty:- Medium

Link to LeetCode problem:-

And you can solve this problem. The link of the problem is given below.

https://leetcode.com/problems/largest-number/

* Problem 3:- Array rotations

Description:-

                    Rotate the element of an array to the right by k steps.

Difficulty:- Medium

Link to LeetCode problem:-

And you can solve this problem. The link of the problem is given below. https://leetcode.com/problems/rotate-array/

* Problem 4:- Spiral matrix

Description:-

                   In this problem you have given an array and you have to return all the elements matrix in spiral order

Difficulty:- Medium

Link to LeetCode problem:-

And you can solve this problem. The link of the problem is given below. https://leetcode.com/problems/spiral-matrix

* Problem 5:- Trapping Rain Water

Description:-

                 You have given a elevation map with width. You have to find how much water it can trapped after raining. For more clarifications you can visit leetcode site. The link of this problem is given below.

Difficulty:- Hard

Link to LeetCode problem:-

And you can solve this problem. The link of the problem is given below. https://leetcode.com/problems/trapping-rain-water/

How to approach these problems:-

1. Understand the problem requirements thoroughly.

2. Before writing code in editor you should write code on copy.

3. Plan your solution before diving into code.

4. Implement your solution step by step.

5. Test your code with different cases to ensure it works as expected.

Tips for success:-

Practice regularly to build a strong foundation.

Understand different array manipulation techniques.

Don't hesitate to seek help or discuss problems with your peers.

Conclusion:-

Congratulations! You've taken the first step toward mastering arrays in Java. Remember, consistent practice is key to becoming a proficient programmer. Keep challenging yourself with more problems and explore different topics to broaden your skills.

Attribution:-

The problems featured in this blog post are inspired by coding challenges commonly found on LeetCode, a fantastic platform for honing your programming skills. To access the original problems and a myriad of others, visit LeetCode at www.leetcode.com. We appreciate their contribution to the coding community.