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IBM Software Developer Interview Questions and Answers
61 Interview questions
Oops concepts in Java
Encapsulation - hiding implementation details
Inheritance - reusing code and creating parent-child relationships
Polymorphism - multiple forms of a method or object
Abstraction - creating abstract classes and interfaces
Example: Encapsulation - using private variables and public methods
Example: Inheritance - creating a subclass that inherits from a superclass
Example: Polymorphism - using method ov...
To reverse a number in Java, convert it to a string, reverse the string, and convert it back to an integer.
Convert the number to a string using Integer.toString() or String.valueOf().
Use StringBuilder to reverse the string: StringBuilder sb = new StringBuilder(str); sb.reverse();
Convert the reversed string back to an integer using Integer.parseInt().
Example: int num = 12345; String str = Integer.toString(num); Str...
To extract words from a line in Java, split the line using whitespace as delimiter.
Use the split() method of String class
Pass the whitespace regex as argument to split() method
Iterate over the resulting array to get individual words
List comprehension is a concise way to create lists in Python. Overloading is having multiple methods with the same name but different parameters. Overriding is implementing a method in a subclass that is already defined in the superclass.
List comprehension is a concise way to create lists in Python, for example: squares = [x**2 for x in range(10)]
Overloading is having multiple methods with the same name but diffe...
What people are saying about IBM
Arrays store elements in contiguous memory, while linked lists store elements in nodes with pointers to the next element.
Arrays have constant time access to elements using index, while linked lists require traversal from the head to access elements.
Arrays have fixed size, while linked lists can dynamically grow and shrink.
Arrays are better for random access, while linked lists are better for insertion and deletion...
What are the roles & responsibilities of a Software Developer at IBM?
Read full roles & responsibilities 
CRM stands for Customer Relationship Management. It is a software that helps businesses manage their interactions with customers.
CRM helps businesses organize customer data and interactions
It can track sales, marketing campaigns, and customer support
Examples of CRM software include Salesforce, HubSpot, and Zoho CRM
IBM HR Interview Questions
Java is a popular programming language used for developing various applications. It follows OOPs concepts.
Java is an object-oriented programming language.
It supports encapsulation, inheritance, and polymorphism.
Encapsulation is the process of hiding data and methods within a class.
Inheritance allows a class to inherit properties and methods from another class.
Polymorphism allows objects to take on multiple forms.
J...
Inheritance is a way to create a new class from an existing class while abstraction is a way to hide implementation details.
Inheritance allows a subclass to inherit properties and methods from a superclass.
Abstraction allows a class to provide only essential information to the outside world and hide implementation details.
Inheritance is a 'is-a' relationship while abstraction is a 'has-a' relationship.
Example of i...
Questions related to Java programming concepts
Comparable is an interface used for natural ordering of objects while Comparator is an interface used for custom ordering of objects
Controller is a class that handles incoming requests and returns a response while RestController is a specialized controller for RESTful web services
ControllerAdvice is an annotation used to define global exception handling for all control...
LSMW (Legacy System Migration Workbench) is a tool for data migration in SAP systems, facilitating data transfer from legacy systems.
1. Define the project: Create a new project in LSMW to manage the data migration process.
2. Maintain Object Attributes: Choose the appropriate object type (e.g., BAPIs, IDocs) for data transfer.
3. Define Source Structures: Specify the structure of the source data, such as Excel or CS...
IBM Software Developer Interview Experiences
110 interviews found
Anonymous
Selected
I applied via Approached by Company and was interviewed in Dec 2024. There was 1 interview round.
(3 Questions)
- Q1. Project based questions
- Ans.
Discussing a software project, focusing on challenges, technologies used, and outcomes.
Utilized Agile methodology for project management, ensuring flexibility and iterative progress.
Implemented RESTful APIs for seamless communication between front-end and back-end services.
Faced challenges with data migration; resolved by creating a robust ETL process.
Incorporated unit testing to enhance code quality, achieving over 90...
- Q2. Scenario based question (multithreading and caching related scenarios were asked to me)
- Q3. One coding challenge
Interview Preparation Tips
Selected
I appeared for an interview in Dec 2024.
(1 Question)
- Q1. Everything Regarding python
(1 Question)
- Q1. Everything regarding AI/ML/DL with example
(1 Question)
- Q1. Most situation-based questions
Deviga Deviga
Selected
I appeared for an interview in Jun 2025, where I was asked the following questions.
- Q1. Self introduction
- Q2. Project questions
- Q3. What programming languages are you most comfortable with, and why?
- Q4. How do you ensure the quality and performance of the code you write?
- Ans.
I ensure code quality and performance through best practices, testing, and continuous improvement techniques.
Follow coding standards and best practices, such as using meaningful variable names and consistent indentation.
Implement unit tests to validate individual components; for example, using JUnit for Java applications.
Conduct code reviews with peers to catch potential issues early and share knowledge.
Utilize perform...
- Q5. Can you describe a challenging bug or issue you encountered in development and how you resolved it?
- Ans.
I faced a critical memory leak in a web application, which I resolved through systematic debugging and code optimization.
Identified the memory leak using profiling tools like Chrome DevTools.
Narrowed down the issue to a specific component that retained references unnecessarily.
Refactored the component to use weak references and properly clean up event listeners.
Conducted extensive testing to ensure the fix did not intr...
I appeared for an interview in Jul 2025, where I was asked the following questions.
- Q1. What factors motivate you in your work?
- Q2. How did you learn coaching, and in which languages do you have expertise?
JYOTI KUMARI
(1 Question)
- Q1. What is the function of a transformer?
- Ans.
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
Transformers are used to increase or decrease the voltage in electrical circuits.
They consist of two coils of wire, known as the primary and secondary coils.
The primary coil is connected to a power source, while the secondary coil is connected to the load.
The changing magnetic field in the primary c...
Rahul M.V
(2 Questions)
- Q1. Basic javascript questions
- Q2. Difference between useCallback and useMemo hooks ?
(2 Questions)
- Q1. React JS scenario based question , how to implement certain requirements
- Ans.
Implementing a dynamic form in React JS to handle user input and validation.
Use controlled components to manage form state. Example: <input value={this.state.value} onChange={this.handleChange} />
Implement validation logic to ensure user inputs are correct before submission. Example: check if email is valid.
Utilize React hooks like useState and useEffect for managing state and side effects in functional component...
- Q2. Previous project , the challenges faced
Interview Preparation Tips
Need to be thorough with the basics of React JS
gayathri reddy yeddla
(2 Questions)
- Q1. Tech questions based on data structures
- Q2. Tech questions on algorithms
I applied via Campus Placement and was interviewed in Aug 2024. There were 3 interview rounds.
Good good good good goog fooof
(2 Questions)
- Q1. C++ based questions asked
- Q2. Dsa based questions asked
(2 Questions)
- Q1. Introduce yourself to the panel
- Q2. What makes you fit for the role
- Ans.
I have a strong background in software development, with experience in various programming languages and a proven track record of delivering high-quality projects on time.
Extensive experience in software development
Proficient in multiple programming languages such as Java, Python, and C++
Strong problem-solving skills and ability to work well in a team
Proven track record of delivering high-quality projects on time
Shankar
I applied via Campus Placement
Normal basic aptitude questions . overall easy
(1 Question)
- Q1. Introduce yourself
- Ans.
I am a software developer with 5 years of experience in Java, Python, and SQL.
5 years of experience in Java, Python, and SQL
Worked on developing web applications using Java Spring framework
Proficient in database management with SQL
Strong problem-solving skills and ability to work in a team environment
(2 Questions)
- Q1. Introduce yourself.
- Ans.
I am a software developer with 5 years of experience in Java, Python, and SQL.
5 years of experience in Java, Python, and SQL
Worked on developing web applications using Java Spring framework
Proficient in database management with SQL
Strong problem-solving skills in software development
- Q2. Why you want to join?
- Ans.
I am passionate about creating innovative software solutions and contributing to a dynamic team.
Passionate about coding and problem-solving
Excited to work on challenging projects
Interested in collaborating with a talented team
Driven to learn and grow in the software development field
I applied via Company Website and was interviewed in Aug 2024. There was 1 interview round.
(2 Questions)
- Q1. Basics DSA questions
- Q2. High level system design
- Ans.
High level system design involves creating an overall architecture for a software system.
Identify the main components of the system
Define the interactions between components
Consider scalability, performance, and security
Use diagrams like UML to visualize the design
Skills evaluated in this interview
IBM Interview FAQs
Some of the top questions asked at the IBM Software Developer interview -
The duration of IBM Software Developer interview process can vary, but typically it takes about less than 2 weeks to complete.
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IBM Software Developer Reviews and Ratings
based on 448 reviews
Rating in categories
|
Application Developer
12.8k
salaries
|  ₹5.2 L/yr - ₹27.1 L/yr |
|
Software Engineer
6.1k
salaries
| ₹8.1 L/yr - ₹25.5 L/yr |
|
Software Developer
6.1k
salaries
| ₹13.7 L/yr - ₹34.4 L/yr |
|
Senior Software Engineer
5.5k
salaries
| ₹14.3 L/yr - ₹30 L/yr |
|
Advisory System Analyst
4.6k
salaries
| ₹13.6 L/yr - ₹23 L/yr |
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