100+ Diebold Nixdorf Interview Questions & Answers | Complete Prep Guide 2025

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Software Engineer Interview Questions & Answers

Santhosh Medide

posted on 2 Sep 2015

Interview Questionnaire

13 Questions

Q1. Explain Polymorphism,Constructors,Destructors,Classes

Ans.

Polymorphism is the ability of an object to take on many forms. Constructors and destructors are special methods in classes.

Polymorphism allows objects to be treated as instances of their own class or as instances of their parent class.
Constructors are used to initialize objects when they are created. Destructors are used to clean up after an object when it is destroyed.
Classes are templates for creating objects. They ...

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Q2. Explain Encapsulisation

Ans.

Encapsulation is the process of hiding implementation details and exposing only the necessary information to the user.

Encapsulation is achieved through access modifiers like public, private, and protected.
It helps in achieving data abstraction and information hiding.
Encapsulation provides better control over the data and prevents unauthorized access.
Example: A class with private variables and public methods to access t...

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Q3. Remove duplicates in linked lists

Ans.

Remove duplicates in linked lists

Traverse the linked list and keep track of visited nodes using a hash table
If a node is already visited, remove it from the linked list
Time complexity: O(n), Space complexity: O(n)

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Q4. Explain mergesort and implement it in code

Ans.

Mergesort is a divide-and-conquer algorithm that sorts an array by dividing it into two halves, sorting each half, and merging them.

Divide the array into two halves
Sort each half recursively
Merge the two sorted halves
Repeat until the entire array is sorted
Example: ['apple', 'banana', 'cherry', 'date'] -> ['apple', 'banana', 'cherry', 'date'] -> ['apple', 'banana'], ['cherry', 'date'] -> ['apple'], ['banana'], ['cherry'...

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Q5. Reverse a string

Ans.

Reverse a given string

Create an empty string
Iterate through the original string in reverse order
Append each character to the empty string
Return the reversed string

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Q6. Reverse words in a string

Ans.

Reverse words in a string

Split the string into an array of words
Reverse the array
Join the array into a string

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Q7. Check if a string is palindrome or not

Ans.

Check if a string is palindrome or not

Reverse the string and compare with original
Compare characters from start and end of string
Ignore spaces and punctuation marks while comparing

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Q8. Puzzles- threads,deficient coin,25 horses,two jars

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Q9. Tell me about yourself

Ans.

I am a software engineer with experience in developing web applications and a passion for problem-solving.

Experienced in developing web applications using technologies such as HTML, CSS, JavaScript, and React
Proficient in programming languages such as Java and Python
Skilled in problem-solving and troubleshooting
Strong communication and collaboration skills
Passionate about staying up-to-date with the latest technologies

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Q10. Why not GATE

Ans.

GATE is not my preferred choice as I am more interested in software development than research.

I am more interested in practical application of software development than theoretical research
I believe my skills and interests align better with software engineering roles
I have researched and found that software engineering roles do not require a GATE qualification

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Q11. Why not MS

Ans.

I prefer open-source technologies and have more experience with them.

I have more experience with open-source technologies like Linux and Python.
I believe in the benefits of open-source software for collaboration and innovation.
I am not opposed to using MS technologies if they are the best fit for the project.
However, I prefer to work with technologies that align with my values and experience.

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Q12. Why Diebold

Ans.

Diebold offers challenging work and opportunities for growth in the software engineering field.

Diebold has a strong reputation in the industry
The company offers a diverse range of projects and technologies to work on
There are opportunities for career growth and development
The work is challenging and rewarding
Diebold values innovation and creativity in its employees

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Q13. Why into Software although you are from ECE

Ans.

Software is the future and ECE has a strong foundation in programming and problem-solving.

ECE curriculum includes programming courses
Software development is a growing industry
Programming skills are transferable across fields
Interest in software development and problem-solving
Opportunities to work on software projects during ECE studies

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Interview Preparation Tips

Round: Test
Experience: General Aptitude had 25 questions ,35 minutes was alloted and wasn't much difficult when compared to other company aptitude tests.
Microprocessors had 15 questions ,25 min was alloted and it covered basic and mediocre level questions from Intel 8086 and some c-apti questions.
Tips: www.indiabix.com for general aptitude and c-apti

Duration: 60 minutes
Total Questions: 40

Round: Technical Interview
Tips: Refer any C++ text book
www.geeksforgeeks.com- for any technical interview
www.indiabix.com for puzzles

Round: HR Interview
Tips: Don't just simply say that you are hardworking,punctual etc.Elab

College Name: NIT Surathkal

Skills evaluated in this interview

Software Engineer Interview Questions asked at other Companies

Q1. Bridge and torch problem : Four people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. Person... read more

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Service Desk Executive Interview Questions & Answers

Anonymous

posted on 24 Nov 2024

Interview experience

Bad

Difficulty level

Process Duration

Less than 2 weeks

Result

Selected

I was interviewed in Oct 2024.

Round 1 - One-on-one

(3 Questions)

Q1. Why are you alive?

Ans.

I am alive to experience the beauty of life, learn, grow, and make a positive impact on the world.

To experience the beauty of life
To learn and grow as a person
To make a positive impact on the world

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Q2. Why did you study?

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Q3. Why do you celebrate?

Ans.

I celebrate to acknowledge achievements, milestones, and special occasions in my life.

Celebrating helps me appreciate my accomplishments and hard work
It allows me to share joy and happiness with loved ones
Celebrations create lasting memories and strengthen relationships
It provides a sense of closure and motivation for future goals

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