20+ Associate Software Developer Interview Questions and Answers for Freshers

It's a list of different items.

• Apple, mango, and grapes are fruits.

• Tea and milk are beverages.

• They are not related to each other.

• It's just a random list of items.

Shuffle a playlist of songs without repeating any song.

• Create a copy of the original playlist

• Use a random number generator to select a song from the copy and remove it

• Add the selected song to a new shuffled playlist

• Repeat until all songs have been selected

• Return the shuffled playlist

Armstrong numbers are numbers that are equal to the sum of their own digits raised to the power of the number of digits.

• Iterate through numbers from 10 to 250

• Calculate the sum of each digit raised to the power of the number of digits

• Check if the sum is equal to the original number, if yes, it is an Armstrong number

Python is a high-level programming language used for various applications. SQL is used for managing relational databases. Big data refers to large datasets that cannot be processed using traditional computing techniques. Data science involves extracting insights from data. Machine learning is a subset of AI that involves training algorithms to make predictions.

• Python is easy to learn and has a large community of developers. It is used for web development, data analysis, and m...read more

I worked on a project that involved developing a web application using Java and Spring framework.

• Developed RESTful APIs using Spring Boot

• Implemented user authentication and authorization using Spring Security

• Used Hibernate for database operations

• Implemented caching using Redis

• My role was to develop and maintain the backend of the application

Reverse a linked list iteratively and recursively.

• Iteratively: Traverse the list and change the pointers to reverse the list.

• Recursively: Traverse to the end of the list and then change the pointers while returning back.

• Create a temporary variable to hold the next node while reversing iteratively.

• In recursive approach, handle the base case when the current node is null.

Find pairs from array whose sum is equal to target.

• Use a hashmap to store the difference between target and each element in the array.

• Iterate through the array and check if the current element exists in the hashmap.

• If it exists, then a pair with the sum equal to target is found.

To fetch data from an API and show the result, use HTTP requests and parse the response data.

• Identify the API endpoint and required parameters

• Make an HTTP request using a library like Axios or Fetch

• Parse the response data using JSON.parse()

• Display the data in the desired format, such as a table or list

Compiler translates entire code into machine code before execution, while interpreter translates code line by line during execution.

• Compiler converts entire code into machine code before execution

• Interpreter translates code line by line during execution

• Compiler generates intermediate object code or executable file

• Interpreter does not generate intermediate object code

• Examples: C, C++ compilers vs Python, Ruby interpreters

Query to find the second largest number from MySQL database.

• Use ORDER BY clause to sort the numbers in descending order.

• Use LIMIT clause to limit the result to 2.

• Use OFFSET clause to skip the first largest number.

• Example: SELECT column_name FROM table_name ORDER BY column_name DESC LIMIT 1 OFFSET 1;

The 4 pillars of OOP are Inheritance, Encapsulation, Abstraction, and Polymorphism.

• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation restricts access to certain components within a class, protecting the data.

• Abstraction hides the complex implementation details and only shows the necessary features.

• Polymorphism allows objects to be treated as instances of their parent class.

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. JS is a scripting language used to create interactive web pages.

• Node.js is used for server-side programming and allows for non-blocking, event-driven I/O.

• JS is used for client-side programming and allows for dynamic and interactive web pages.

• Both Node.js and JS are open-source and have a large community of developers.

• Node.js can be used with various frameworks such as Express and NestJS.

• JS can be used wit...read more

Shortest path algo is a method to find the most efficient route between two points in a graph or network.

• Shortest path algorithms are used in various applications such as GPS navigation systems, network routing, and logistics planning.

• Examples of shortest path algorithms include Dijkstra's algorithm, Bellman-Ford algorithm, and Floyd-Warshall algorithm.

• These algorithms calculate the shortest path based on different criteria such as distance, time, or cost.

• The goal is to find ...read more

Polymorphism is the ability of an object to take on many forms. It allows objects of different classes to be treated as the same type.

• Polymorphism is achieved through method overriding and method overloading.

• Method overriding allows a subclass to provide a different implementation of a method that is already defined in its superclass.

• Method overloading allows multiple methods with the same name but different parameters in the same class.

• Polymorphism helps in achieving code re...read more

DOM stands for Document Object Model in JavaScript, which represents the structure of a webpage as a tree of objects.

• DOM is a programming interface for web documents.

• It allows scripts to dynamically access and update the content, structure, and style of a webpage.

• DOM represents the HTML elements as objects, allowing manipulation through JavaScript.

• Example: document.getElementById('myElement') retrieves an element with the specified ID.

The numbers should be sorted in ascending order: 0 1 2

• Use a sorting algorithm like bubble sort, selection sort, or insertion sort

• Compare each number with the next one and swap if necessary

• Repeat the process until the array is sorted

I have worked on various projects including a web application for a retail company and a mobile app for a fitness tracker.

• Developed a web application for a retail company using React and Node.js

• Created a mobile app for a fitness tracker using Swift and Firebase

• Collaborated with a team to implement new features and fix bugs

Find the maximum value in an array of strings.

• Iterate through the array and compare each element to find the maximum value.

• Convert the strings to numbers if needed before comparison.

• Handle edge cases like empty array or non-numeric strings.