TCS Digital Coding Questions: Top 5 Coding Questions & Solutions

TCS Digital is a premium role offered by Tata Consultancy Services (TCS) that focuses on digital technologies. To secure this role, candidates must go through a rigorous selection process, including a challenging coding round. This guide provides a comprehensive overview of TCS Digital coding questions, covering various aspects such as previous year questions, advanced coding problems, and the types of questions to expect.

TCS Digital Coding Round Overview

The coding round is a crucial stage in the TCS Digital hiring process. It typically consists of 2-3 questions that test the candidate's problem-solving abilities, coding skills, and algorithmic knowledge. The time duration for this round is usually between 60 to 90 minutes.

Digital Coding Questions: Topics Covered

The questions in TCS Digital coding assessments cover a wide range of programming topics. Here's a breakdown of the topics and the types of questions you may encounter:

TCS Digital Previous Year Coding Questions

TCS Digital often repeats coding patterns from previous years with slight modifications. Here are some examples of the previous year's coding questions:

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Top 5 Digital Coding Questions with Solution

Problem Statement 1

One day, Jack finds a string of characters. He is very keen to arrange them in reverse order, i.e., the first characters become the last characters, the second characters become the second-last characters, and so on.

Now he wants your help  to find the kth character from the new string formed after reverse the original string.

Note: String contains only lowercase Latin letters.

Input Format

The first line contains two integers n, k — the length of array and the value of k respectively.

The second line contains a string containing n characters.

Output Format

Print a single line containing the kth character of the string.

Constraints

1 ≤ k ≤ n≤ 10^6

Testcase Input

5 2

abdfa

Testcase Output

f

Solution 1: C++

Solution 1: Java

Solution 3: Python 

Problem Statement 2

Alice challenged Bob to write the same word as his on a typewriter. Both are kids and are making some mistakes in typing and are making use of the ‘#’ key on a typewriter to delete the last character printed on it.

An empty text remains empty even after backspaces. 

Input Format

The first line contains a string typed by Bob.

The second line contains a string typed by Alice.

Output Format

The first line contains ‘YES’ if Alice is able to print the exact words as Bob , otherwise ‘NO’.

Constraints

1 <= Bob.length

Alice.length <= 100000

Bob and Alice only contain lowercase letters and '#' characters.

Testcase Input

ab#c

ad#c

Testcase Output

YES

Solution 1: C++

Solution 2: Python 

Solution 3: Java 

Problem Statement 4

There are n spaceship at given lightyears away from the earth and traveling to reach a distant star system at k lightyear away from earth. You are given two integer arrays, position and speed, both of length n, where

P[i] is the current distance of the ith spaceship

S[i] is the speed of the ith spaceship in lightyears per year.

As the spaceships travel toward the star system, an interesting phenomenon occurs: when a faster spaceship catches up to a slower one, it reduces its speed to match the slower spaceship's speed, forming a fleet. A fleet is a group of one or more spaceships that travel together at the same speed.

Given this information, determine the number of distinct spacecraft fleets that will arrive at the destination star system. A fleet is considered distinct if no other fleet arrives at the destination at the same time while traveling together.

Input Format

The first line contains an integer 'n', representing the total number of spaceships.

The second line contains an integer 'k', representing the distance of the star system from Earth.

The third line contains 'n' space-separated integers denoting the current distance of the i-th spaceship from Earth.

The fourth line contains 'n' space-separated integers denoting the speed of the i-th spaceship.

Output Format

Return the number of spacecraft fleets that will arrive at the destination.

Constraints

1 <= n <= 10^5

0 < k <= 10^6

0 <= P[i] < target

0 < S[i] <= 10

Testcase Input

4

14

10 8 5 3

2 4 1 3

Testcase Output

2

Solution 1: Python 

Solution 2: C++

Solution 3: Java

Problem Statement 5

You are provided with a 2D array(N*M). Your task is to create an ArrayList of Node objects, where each row of the 2D array corresponds to one entry in the ArrayList. After that, a doubly-linked list is constructed, arranging nodes first by even indices from the ArrayList, followed by the odd indices.

Input Format

The first line contains an integer N, representing the size of the array row.

The second line contains an integer M, representing the size of array col.

The third line contains an array.

Output Format

return the linked list

Constraints

1 <= N < 10^2

1 <= M < 10^2

Testcase Input

4

6

2 4 5 3 6 7

5 3 6 3 6 7

3 6 7 2 6 8

4 2 1 6 8 9

Testcase Output

2 <---> 4 <---> 5 <---> 3 <---> 6 <---> 7 <---> 3 <---> 6 <---> 7 <---> 2 <---> 6 <---> 8 <---> 5 <---> 3 <---> 6 <---> 3 <---> 6 <---> 7 <---> 4 <---> 2 <---> 1 <---> 6 <---> 8 <---> 9 <---> null

Solution 1: Java

Solution 2: C++

Solution 3: Python 

Digital Advanced Coding Questions

TCS Digital coding questions for advanced levels test not only your knowledge but also your efficiency in solving complex problems within tight time constraints. These questions often involve multiple layers of logic and optimization techniques. Here are a few sample advanced coding problems:

TCS Digital Coding Round Questions

The coding round for TCS Digital typically involves a mix of medium to high difficulty problems. Here is an example format of a typical coding round:

Digital Coding Questions for Freshers

While the coding questions for TCS Digital are challenging, they are also solvable with proper preparation. Freshers are typically expected to demonstrate a strong grasp of fundamental algorithms and data structures. Commonly asked coding questions for freshers include:

How to Prepare for TCS Digital Coding Exam?

To succeed in TCS Digital coding rounds, you need to focus on understanding and practising core topics:

Disclaimer: While we have gathered as much information from TCS’s official website as possible, we have also included sources gathered from available online sources. Therefore, readers are advised to check and stay updated with the official website.

Conclusion

TCS Digital coding questions challenge candidates on multiple levels, requiring proficiency in algorithms, data structures, dynamic programming, and more. Whether you're a fresher or an experienced professional, thorough preparation and continuous practice of advanced coding problems are essential for cracking the TCS Digital coding round.

Use the past questions as practice and focus on time-bound solving to improve speed and accuracy. By mastering the essential topics and practising a variety of coding problems, you can significantly increase your chances of securing a role in TCS Digital.

Frequently Asked Questions (FAQs)

1. What is the difficulty level of coding questions in the TCS Digital exam?

The coding questions in TCS Digital range from moderate to advanced. They often test knowledge of algorithms, data structures, and problem-solving with an emphasis on optimization.

2. Which programming languages can I use in the TCS Digital coding round?

You can choose from popular languages such as C, C++, Java, Python, and sometimes JavaScript, depending on the platform used for the coding assessment.

3. How many coding questions are asked in the TCS Digital exam?

Typically, the TCS Digital exam includes 2-3 coding questions to be solved within 60 to 90 minutes.

4. What are the most common topics for TCS Digital coding questions?

The most common topics include dynamic programming, string manipulation, sorting and searching algorithms, graph theory, and data structures like arrays, trees, and linked lists.

5. How can I prepare for the TCS Digital advanced coding questions?

To prepare for advanced coding questions, focus on solving complex problems related to dynamic programming, graph algorithms, and system design. Practising on coding platforms like LeetCode and Codeforces can also be helpful.

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