60+ Software Developer fresher Interview Questions and Answers

Yes, Java allows implementing multiple interfaces in a single class.

• A class can implement multiple interfaces separated by a comma.

• All the methods of the implemented interfaces must be defined in the class.

• Example: class MyClass implements Interface1, Interface2 { }

Dynamic language is a programming language that executes at runtime and allows for flexibility in variable types.

• Variables do not need to be declared with a specific data type

• Examples include Python, Ruby, and JavaScript

• Statically typed languages require variable types to be declared before runtime

Normalization is the process of organizing data in a database to eliminate redundancy and improve data integrity.

• Normalization helps in reducing data redundancy by breaking down a large table into smaller, more manageable tables.

• It ensures that each piece of data is stored in only one place, reducing the chances of inconsistencies.

• Normalization follows a set of rules called normal forms, such as First Normal Form (1NF), Second Normal Form (2NF), etc.

• Each normal form has speci...read more

Constructor is used to initialize an object while method is used to perform a specific task.

• Constructor is called automatically when an object is created while method is called explicitly.

• Constructor has the same name as the class while method has a unique name.

• Constructor does not have a return type while method has a return type.

• Example of constructor: public class Person { public Person() { // constructor code } }

• Example of method: public void printName() { // method code ...read more

OOP (Object-Oriented Programming) is a programming paradigm based on objects and classes to structure software design.

• Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class).

• Inheritance: Mechanism to create a new class using properties and methods of an existing class (e.g., a 'Dog' class inheriting from an 'Animal' class).

• Polymorphism: Ability to present the same interface for different underlying data types (e.g., method overriding ...read more

Java is a high-level, object-oriented programming language used for developing applications. It is case sensitive.

• Java is platform-independent and can run on any device with a Java Virtual Machine (JVM)

• Java is used for developing web, mobile, and desktop applications

• AWT (Abstract Window Toolkit) is a Java package used for creating graphical user interfaces (GUIs)

• MVC (Model-View-Controller) is a software design pattern used for separating an application's data, user interface,...read more

Culture add is the unique value an individual brings to a company's culture, while culture fit is the alignment of an individual's values with the company's culture.

• Culture add focuses on what an individual can bring to enhance the company's culture.

• Culture fit focuses on how well an individual's values align with the company's culture.

• Culture add promotes diversity and inclusion in the workplace.

• Culture fit can lead to homogeneity in the workplace.

• For example, a company may ...read more

Code for Fibonacci series

• Use recursion or iteration to generate the series

• Start with 0 and 1, then add the previous two numbers to get the next

• Can be optimized using memoization or dynamic programming

Culture add interview questions are designed to assess a candidate's potential to contribute positively to the company culture.

• Ask about their hobbies and interests outside of work

• Inquire about their experience working in diverse teams

• Ask how they handle conflict and difficult situations

• Ask about their values and how they align with the company's values

• Ask about their communication style and how they collaborate with others

An interface is a contract that defines a set of methods and properties that a class must implement.

• An interface is a blueprint for a class.

• It contains only the method signatures and properties.

• It does not contain any implementation code.

• A class can implement multiple interfaces.

• Interfaces are used for achieving abstraction and polymorphism.

• Example: IDisposable interface in C#.

• Example: Runnable interface in Java.

HTML and Java are two different programming languages used for different purposes.

• HTML is used for creating web pages and defining their structure and content.

• Java is a general-purpose programming language used for developing applications and software.

• HTML is a markup language while Java is an object-oriented programming language.

• HTML is used for front-end development while Java is used for back-end development.

• HTML is not a programming language but a markup language used for...read more

Prepare thoroughly, practice common questions, and showcase your skills to successfully crack a job interview.

• Research the company: Understand its culture, products, and recent news to tailor your answers.

• Practice common interview questions: Prepare for questions like 'Tell me about yourself' or 'What are your strengths and weaknesses?'

• Showcase your projects: Discuss relevant projects or internships that demonstrate your skills and problem-solving abilities.

• Dress appropriatel...read more

Java is a high-level programming language known for its platform independence and object-oriented programming features.

• Java is an object-oriented programming language that follows the OOPS concepts.

• It is platform-independent, meaning it can run on any platform with a Java Virtual Machine (JVM).

• Java is known for its security features and is widely used for developing web and mobile applications.

• Some of the popular Java frameworks include Spring, Hibernate, and Struts.

• OOPS conc...read more

Python is a high-level programming language known for its simplicity and readability.

• Python is an interpreted language, which means it does not need to be compiled before running.

• It has a large standard library that provides many pre-built functions and modules.

• Python supports multiple programming paradigms, including procedural, object-oriented, and functional programming.

• Some of the keywords in Python include 'if', 'else', 'for', 'while', 'def', 'class', 'import', 'try', 'e...read more

C is a procedural language while Java is an object-oriented language.

• C is compiled while Java is interpreted.

• C has pointers while Java does not.

• Java has automatic garbage collection while C does not.

• Java has platform independence while C does not.

• Java has built-in exception handling while C does not.

It is important to learn C, Java, and Python for software development. CSS and HTML are also useful for front-end development.

• C is a low-level language often used for system programming.

• Java is a versatile language commonly used for enterprise applications.

• Python is a high-level language known for its readability and versatility.

• CSS is used for styling web pages.

• HTML is used for creating the structure of web pages.

Multi-threading is a technique of executing multiple threads simultaneously in a single process.

• Multi-threading improves application performance by utilizing multiple CPUs or CPU cores.

• Each thread runs independently and shares the same memory space.

• Threads can communicate with each other through shared memory or message passing.

• Examples of multi-threaded applications include web servers, video games, and database systems.

A stack is a linear data structure that follows the Last In First Out (LIFO) principle.

• Elements are added to the top of the stack and removed from the top.

• Push() and pop() are the two main operations performed on a stack.

• Example program: Push 1, 2, 3 onto stack and pop them off in reverse order.

Object-Oriented Programming (OOP) in Python focuses on concepts like classes, objects, inheritance, and encapsulation.

• Classes are blueprints for creating objects. Example: class Dog: pass

• Objects are instances of classes. Example: my_dog = Dog()

• Inheritance allows a class to inherit attributes and methods from another class. Example: class Puppy(Dog): pass

• Encapsulation restricts access to certain components. Example: using private variables with '_' prefix.

• Polymorphism allows m...read more

Java is a high-level, object-oriented programming language used for developing applications and software.

• Java is platform-independent and can run on any device with a Java Virtual Machine (JVM)

• It is known for its security features and is commonly used for developing web applications, mobile apps, and games

• Java code is compiled into bytecode which can be executed on any platform that has a JVM installed

• Java has a vast library of pre-built classes and APIs that make development...read more

To delete an element in a linked list, we need to find the node before the node to be deleted and update its next pointer.

• Find the node before the node to be deleted

• Update the next pointer of the previous node to point to the node after the node to be deleted

• Free the memory occupied by the node to be deleted

I know multiple programming languages.

• I am proficient in Java and Python.

• I have basic knowledge of C++ and JavaScript.

• I am currently learning Ruby and Swift.

Program to check if a given string is a palindrome or not

• Convert the string to lowercase to ignore case sensitivity

• Use two pointers, one at the start and one at the end of the string

• Compare the characters at both pointers and move them towards each other

• If all characters match, it is a palindrome

Program to find first letters in a sentence

• Split the sentence into words

• Get the first letter of each word

• Store the first letters in an array

The formula for power is P = W/t or P = F*v

• Power is the rate at which work is done or energy is transferred

• The unit of power is watt (W)

• P = W/t where W is work done and t is time taken

• P = F*v where F is force and v is velocity

• Power can be calculated for electrical circuits using P = VI or P = I^2*R

Software Development Life Cycle (SDLC) is a process followed by software development teams to design, develop and test high-quality software.

• SDLC consists of several phases including planning, analysis, design, development, testing, deployment, and maintenance.

• Each phase has its own set of activities and deliverables that must be completed before moving on to the next phase.

• SDLC models include Waterfall, Agile, and DevOps, each with its own approach to software development.

• SD...read more

Threads are lightweight processes that enable multitasking within a single process.

• Threads share the same memory space as the parent process.

• They can run concurrently and independently of each other.

• Threads can communicate with each other through shared memory or message passing.

• Examples of multithreaded applications include web servers and video games.