Infosys Software Engineer Interview Questions and Answers for Freshers

Identifying prime numbers involves checking divisibility by integers up to the square root of the number.

• A prime number is greater than 1 and has no divisors other than 1 and itself.

• To check if a number n is prime, test divisibility from 2 to √n.

• For example, to check if 29 is prime: test 2, 3, 4, 5 (all ≤ √29). None divide 29, so it's prime.

• For composite numbers, like 30, it can be divided by 2, 3, 5, etc., confir...read more

Encapsulation is a fundamental OOP principle that restricts direct access to an object's data and methods.

• Encapsulation helps in data hiding, protecting object integrity.

• It allows controlled access through public methods (getters/setters).

• Example: A class 'BankAccount' with private balance and public methods to deposit/withdraw.

• Encapsulation promotes modularity and maintainability in code.

DevOps is a collaborative process that integrates software development and IT operations for faster delivery and improved quality.

• Continuous Integration (CI): Automating code integration and testing, e.g., using Jenkins or GitHub Actions.

• Continuous Delivery (CD): Ensuring code is always in a deployable state, e.g., using Docker for containerization.

• Infrastructure as Code (IaC): Managing infrastructure through code...read more

Kubernetes (K8s) is an open-source platform for automating deployment, scaling, and management of containerized applications.

• K8s orchestrates containers across a cluster of machines, ensuring high availability and scalability.

• It uses a declarative configuration model, allowing users to define the desired state of applications.

• K8s supports rolling updates, enabling seamless application updates without downtime.

• It p...read more

Hashing function is a mathematical function that converts data of arbitrary size to a fixed size.

• Hashing is used for data integrity and security purposes.

• Hash functions are one-way functions, meaning it is difficult to reverse engineer the original data from the hash value.

• Examples of hashing algorithms include MD5, SHA-1, and SHA-256.

A foreign key is a column or a set of columns in a table that refers to the primary key of another table.

• It establishes a relationship between two tables.

• It ensures referential integrity.

• It helps in maintaining data consistency.

• It can be null or have duplicate values.

• Example: A 'customer_id' column in an 'orders' table that refers to the 'id' column in a 'customers' table.