Infosys Interview Questions for Freshers

“Explain the latest project you have worked on.”

Answer using this structure: the problem you solved, the tech stack you chose and why, your specific contribution (not the team’s), one significant challenge you faced, and what you would improve now. Never claim team work as your own contribution — interviewers follow up with specific implementation questions that expose this immediately. If your project used a database, be ready to show the schema. If it used an API, be ready to explain how it works.

“Explain the four pillars of OOP with real-world examples.”

Encapsulation: a capsule holds medicine without exposing its contents — in code, a class wraps data and methods together and controls access through public and private modifiers. Inheritance: a savings account inherits basic account properties but adds interest-specific behaviour. Polymorphism: the same brake function works differently in a car versus a bicycle — one method, multiple implementations. Abstraction: a TV remote lets you change channels without knowing the internal circuit — in code, an interface exposes what a class does without showing how. Use your own project as an example wherever possible. That connection earns extra credit.

Common follow-ups: What is the difference between overloading and overriding? What is an abstract class versus an interface? Can you show polymorphism in code?

“What is the difference between DROP and TRUNCATE commands?”

DROP removes the entire table structure along with all its data from the database permanently — the table no longer exists after a DROP. TRUNCATE removes all the data inside the table but keeps the table structure intact for future use. TRUNCATE is faster than DELETE for clearing all rows because it does not log individual row deletions. You cannot roll back a DROP without a backup. TRUNCATE can be rolled back in some database systems depending on the transaction model.

Also prepare: What is normalization? Explain ACID properties. What is the difference between primary key and foreign key? Write a query to find the second highest salary.

“What is the difference between a process and a thread?”

A process is an independent program in execution with its own memory space, resources, and state. A thread is a subset of a process — it is a unit of execution within a process. Multiple threads within the same process share the same memory space, which makes communication between threads faster than between processes. Because threads share memory, they are more efficient but require careful synchronisation to avoid race conditions. Creating a new thread is faster and uses fewer resources than creating a new process.

Also prepare: What is deadlock? What is context switching? Explain the difference between paging and segmentation.

“Explain the difference between a stack and a queue with use cases.”

A stack follows Last In First Out (LIFO) — the last element added is the first removed. Used in function call stacks, undo operations in text editors, and browser back navigation. A queue follows First In First Out (FIFO) — the first element added is the first removed. Used in print queues, CPU scheduling, and message processing systems. If you used either in your project, mention it specifically. That connection demonstrates applied understanding, not just memorisation.

Also prepare: What is a linked list and when would you use it over an array? Explain binary search. What is the time complexity of common sorting algorithms?

“Reverse a string without using built-in functions.”

Talk through your approach before writing. Use two pointers — one starting at the beginning, one at the end, swap characters and move inward until they meet. This is O(n) time and O(1) space. Mention edge cases: empty string, single character, even versus odd length. Write it cleanly with variable names that explain the logic. If you make a mistake, correct it calmly — do not freeze or apologise excessively. Interviewers notice composure under pressure.

Also prepare: Check if a string is a palindrome. Find duplicates in an array. Check if a number is prime. Write a function to find the second largest element.

“Tell me about yourself.”

Use the Present, Past, Future structure. Present: your degree, your strongest skill or area. Past: one specific academic achievement or project you are proud of. Future: why Infosys and what you want to learn here. Keep it under 90 seconds. Do not recite your resume — the interviewer has it in front of them. Do not start with your hometown or family details — start with your professional identity. Practice this until it sounds natural, not memorised.

“Why do you want to join Infosys?”

Mention something specific: the structured Foundation Training Programme at Mysuru, Infosys’s focus on emerging technologies through the DSE and SP tracks, or a specific Infosys initiative you read about. Connect it to your own goal — not what Infosys can give you, but what you want to contribute and build there. A candidate who says “I want to work on cloud infrastructure and I read that Infosys has been expanding its AWS practice significantly” is more memorable than one who says “Infosys is a global leader in IT services.”

“Where do you see yourself in 5 years?”

Be honest about being at the start of your career. A strong answer: in the first two years, master the foundation training and deliver well on my first project. Within five years, develop enough technical depth to take on a module lead or senior developer role. Avoid saying you want to be a manager in two years — it signals unrealistic expectations. Avoid saying you want to start your own company in five years — it signals you see Infosys as temporary. Frame your growth within Infosys, not away from it.

“Are you willing to relocate or work in rotational shifts?”

Answer directly and positively: “Yes, I am completely comfortable with relocation and rotational shifts. I understand that working with global clients means adapting to different time zones and I see this as an opportunity to gain broader exposure.” If you have a genuine constraint, state it calmly with a specific reason and openness to discussion — do not present it as a refusal. The Mysuru training relocation specifically is a condition of joining and should be accepted without qualification.

“What is your biggest weakness?”

Choose a real weakness that is not critical to the SE role. State it honestly, then explain what you are actively doing to address it. Example: “I sometimes get absorbed in technical problems and lose track of time. I have started using time-boxing — setting a fixed time limit before asking for help or moving on — which has made my problem-solving more efficient.” The structure is: honest weakness, specific improvement action, measurable result. The weakness itself matters less than the self-awareness and the action you took.