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IBM Software Developer Interview Questions and Answers
61 Interview questions
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 comp...
useCallback is used to memoize functions, while useMemo is used to memoize values.
useCallback is used to memoize functions to prevent unnecessary re-renders.
useMemo is used to memoize the result of an expensive computation.
Both hooks help optimize performance by memoizing values.
Example: useCallback can be used to memoize event handler functions.
Example: useMemo can be used to memoize the result of a complex calcu...
Multithreading allows multiple threads to run concurrently, improving performance and responsiveness.
Multithreading is used to execute multiple tasks simultaneously.
Threads share the same memory space, allowing for efficient communication and data sharing.
Example: A web server handling multiple client requests concurrently using separate threads.
A project code for a web application that tracks inventory and generates reports.
Use HTML, CSS, and JavaScript for front-end development
Utilize Node.js and Express for back-end development
Implement a database like MongoDB for data storage
Include features like user authentication and CRUD operations
What people are saying about IBM
Code in C++ to print 'Hello, World!'
Use the 'cout' function from the 'iostream' library to print the message
Include the 'iostream' header file at the beginning of the code
Use the 'namespace std;' declaration to avoid writing 'std::' before 'cout'
What are the roles & responsibilities of a Software Developer at IBM?
Read full roles & responsibilities 
Code in Java to sort an array of strings alphabetically
Use Arrays.sort() method to sort the array of strings
Implement a custom Comparator if needed for custom sorting criteria
Handle null or empty strings appropriately
IBM HR Interview Questions
C is a low-level language with manual memory management, while Java and Python are high-level languages with automatic memory management.
C is a low-level language, closer to the hardware, and requires manual memory management
Java and Python are high-level languages, with automatic memory management handled by the runtime environment
C is compiled directly to machine code, while Java and Python are typically compile...
SOAP API is a protocol for exchanging structured information in the implementation of web services.
SOAP stands for Simple Object Access Protocol
It uses XML for message format
It relies on HTTP or SMTP for message transmission
It is a widely used protocol for web services communication
REST API is a set of rules and conventions for building and interacting with web services using HTTP methods.
REST stands for Representational State Transfer
Uses standard HTTP methods like GET, POST, PUT, DELETE
Data is transferred in JSON or XML format
Stateless communication between client and server
Example: GET request to retrieve data from a server
String is a sequence of characters in Java.
String is a class in Java.
Strings are immutable, meaning their values cannot be changed once created.
Strings can be created using double quotes or the String constructor.
String concatenation can be done using the '+' operator.
Strings have many built-in methods for manipulation and comparison.
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
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salaries
| ₹8.1 L/yr - ₹25.5 L/yr |
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Software Developer
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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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