ADP Selected Coding Questions, Answers and Tips for Freshers 2025

When it comes to starting your career with a global leader in technology, ADP stands out as a top choice. Their coding test is a crucial step in the hiring process and is designed to assess your problem-solving abilities, coding expertise, and logical thinking. 

Whether you're a fresher eager to make your mark or an experienced professional aiming to grow, the detailed content in this article will help you prepare effectively for the ADP coding test.

What is the ADP Coding Test?

The ADP coding test is an integral part of the recruitment process for roles requiring technical expertise. It evaluates your ability to solve real-world problems using programming languages, algorithms, and data structures. 

Here's what you need to know:

Key Topics Covered in the ADP Coding Test

To ace the ADP coding test, focus on the following areas:

1. Data Structures

• Arrays, linked lists, stacks, and queues
• Trees and graphs (binary search trees, BFS, DFS)

2. Algorithms

• Sorting (quick sort, merge sort)
• Searching (binary search, linear search)
• Dynamic programming (knapsack problem, longest subsequence)

3. Problem Solving

• String manipulation (palindromes, substring problems)
• Number theory (prime numbers, greatest common divisors)

4. Debugging

• Identify and fix errors in existing code snippets.
• Focus on reading error messages and understanding their meaning.

Selected Questions for the ADP Coding Test

Problem Statement 1

John and Davis are playing a game with ( N ) distinct coins, each numbered from 1 to ( N ). John challenges Davis to place the coins in a straight line. The challenge is that any coin with a number ( P ) that satisfies the equation 1×2×3×...×(p−1)+1 is divisible by ( P ) and must be placed at a prime position in the line. Davis is confused and needs help to find the number of ways to arrange the coins.

Note: If the number of ways is large, take the result modulo (10^9 + 7).

Input Format

The first line consists of an integer ( N ), which denotes the number of coins.

Output Format

Print a single line consisting of an integer that shows the number of ways that are possible.

Solution C++

Solution Java

Solution Python

Problem Statement 2

Given two strings, S and T, your task is to check whether T can be obtained by dividing S into two equal parts and interleaving the characters of the two parts with each other without changing the order of characters within each part.

For example, the string "GHIJKL" can be split into two parts: "GHI" and "JKL". It can be interleaved into "GJHKIL" but not into "HGIKJL", as the order of characters within each part must remain intact.

Find whether T can be obtained from S under these conditions.

Input Format

The first line of input contains two space-separated strings, S and T, representing the original string and the target string, respectively.

Output Format

Display boolean value 1 if T can be formed by interleaving the two parts of S; otherwise, print 0.

Solution C++

Solution Java

Solution Python

Problem Statement 3

Marco likes words a lot. But he likes them in lowercase only. He got a book from his friend where words are written in upper and lowercase characters. Help Marco to convert all words into lowercase.

Input Format

The first line contains the string word.

Output Format

The first line contains the transformed string in lowercase.

Solution C++

Solution Java

Solution Python

Problem Statement 4

Alice loves the sequence and series in mathematics. He got very interesting questions about the special series. The Nth term of the Special Series is the absolute difference between the last two terms of the special series. You have given 3 integers: A, B, and N. A and B represent the first and second terms of the special series.

Your task is to return to the Nth term of the special series.

Input Format

The first and only line contains 3 space-separated integers: A, B, and N.

Output Format

Print the 'N' th term of the special series.

Solution C++

Solution Java

Solution Python

Problem Statement 5

You are given an array of N intervals, where each interval is defined by a start and an end. Your task is to minimize the smallest difference between overlapping intervals.

Specifically, you need to find the difference between the start and end of any overlapping intervals and return the minimum difference among these.

For example, if the overlapping intervals are [1, 5] and [2, 3], the difference is calculated as 3 - 2, which equals 1. You should return the smallest such difference.

Input Format

The first line contains an integer representing the number of intervals.

The next lines each contain two space-separated integers representing the start and end of each interval.

Output Format

Print a single integer representing the minimum difference between the overlapping intervals.

Solution C++

Solution Java

Solution Python

Are you looking for coding assessment questions related to job placement? Click here to access coding practice sessions from moderate to challenging levels.

Preparation Tips for ADP Coding Questions

Here are actionable steps to prepare effectively for the test:

Conclusion

The ADP coding test is your gateway to an exciting career with one of the world's leading technology companies. By mastering the topics, practising regularly, and staying calm during the test, you can set yourself up for success. Remember, preparation is key—so start early, practice smartly, and ace the coding test!

Frequently Asked Questions (FAQs)

1. What level of coding expertise is required for the ADP coding test

Freshers should have a solid grasp of programming basics, while experienced candidates may encounter advanced problem-solving tasks.

2. Can I use any programming language in the test?

Yes, ADP allows flexibility in choosing languages like C, C++, Java, and Python.

3. How can I improve my debugging skills for the test?

Regularly debug code on platforms like GeeksforGeeks or practice finding errors in sample problems.

4. Are there negative marks for wrong answers?

Generally, no negative marking is applied, but ensure to check specific test guidelines.

5. What is the best way to prepare for ADP coding questions?

Focus on practising coding problems, reviewing past test questions, and understanding algorithms.

Disclaimer: While we strive for accuracy, we do not guarantee its completeness or reliability. Readers are encouraged to verify all facts and statistics from the official company website or check independently before making decisions.

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