10+ Interview Questions and Answers

OOPS concepts revolve around the principles of encapsulation, inheritance, polymorphism, and abstraction. Method overloading involves multiple methods with the same name but different parameters, while method overriding involves a subclass providing a specific implementation of a method defined in its superclass.

• OOPS concepts include encapsulation, inheritance, polymorphism, and abstraction

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

• E...read more

A variable is a storage location in a computer program that holds data and can be referenced and manipulated.

• Variables are used to store data in a program and can be of different types such as integers, strings, or arrays.

• In HTML, variables are not directly used, but data can be stored in attributes or elements for manipulation.

• Coding in an array involves storing multiple values in a single variable, accessed by index numbers.

The volatile keyword in Java is used to indicate that a variable's value will be modified by multiple threads.

• Used to prevent compiler optimizations that could cause unexpected behavior in multi-threaded environments

• Ensures that the value of the variable is always read from and written to the main memory, not from CPU cache

• Commonly used when working with shared variables in multi-threaded applications

Web development is the process of creating websites and web applications using programming languages, frameworks, and tools.

• Involves front-end development for user interface design and back-end development for server-side logic

• Requires knowledge of HTML, CSS, JavaScript, and various web development frameworks like React, Angular, or Node.js

• Includes tasks such as web design, web content development, client-side/server-side scripting, and network security configuration

Company policies cover various aspects such as code of conduct, benefits, leave policies, etc.

• Company policies are usually outlined in an employee handbook or on the company's intranet.

• Policies may include code of conduct, dress code, attendance, benefits, leave policies, etc.

• Employees are expected to adhere to these policies to maintain a positive work environment.

• Examples of company policies include anti-discrimination policies, remote work policies, and social media usage ...read more

A class in C++ is a user-defined data type that contains data members and member functions.

• Classes are used to create objects, which are instances of the class.

• Classes can have access specifiers like public, private, and protected.

• Classes can have constructors and destructors for initialization and cleanup tasks.

• Classes can have member functions to operate on the data members.

• Example: class Car { private: int speed; public: void accelerate() { speed++; } };

• Example: Car myCar;...read more

The project code is a web application that allows users to create and share interactive quizzes.

• The code uses HTML, CSS, and JavaScript to create the front-end interface.

• It utilizes Node.js and Express for the back-end server.

• MongoDB is used as the database to store user-generated quizzes.

• Socket.io is used for real-time communication between users during quiz sessions.

A program to find prime numbers in a given range.

• Iterate through numbers in the given range

• Check if each number is divisible by any number other than 1 and itself

• If not divisible, then the number is prime

Program to find duplicates in an array of strings

• Iterate through the array and store each element in a hash set

• If an element is already in the hash set, it is a duplicate

• Return a list of all duplicates found