10+ Nuform Social Interview Questions and Answers

Method overloading is having multiple methods in the same class with the same name but different parameters. Method overriding is redefining a method in a subclass with the same name and parameters as in the superclass.

• Method overloading allows a class to have multiple methods with the same name but different parameters.

• Method overriding involves redefining a method in a subclass that is already defined in the superclass.

• Overloading is resolved at compile-time while overridin...read more

OOPs stands for Object-Oriented Programming while POPs stands for Procedure-Oriented Programming. Encapsulation is the concept of bundling data and methods that operate on the data into a single unit. Polymorphism refers to the ability of a single function or method to operate on different types of data.

• OOPs focuses on objects and classes, allowing for better organization and reusability of code.

• POPs focuses on procedures and functions, which can lead to less organized and le...read more

A dangling pointer is a pointer that points to a memory location that has been deallocated, leading to undefined behavior.

• Dangling pointers can occur when a pointer is not set to NULL after the memory it points to is freed.

• Accessing a dangling pointer can result in a crash or unexpected behavior.

• Example: int *ptr = new int; delete ptr; // ptr is now a dangling pointer

A class is a blueprint for creating objects, and objects are instances of classes. Constructors are special methods used to initialize objects.

• Class is a template that defines the properties and behaviors of objects.

• Object is an instance of a class that has its own state and behavior.

• Constructors are special methods used to initialize objects when they are created.

• Example: Class 'Car' defines properties like 'color' and behaviors like 'drive'. Object 'myCar' is an instance of...read more

Java is a popular programming language known for its platform independence and robustness.

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

• Java is object-oriented, allowing for modular and reusable code

• Java has a large standard library, providing pre-built functionality for common tasks

• Java is widely used in enterprise applications, web development, mobile apps, and more

Java interfaces are used to define a contract for classes to implement, allowing for polymorphism and loose coupling.

• Interfaces in Java are used to define abstract methods that must be implemented by classes that implement the interface.

• Interfaces can also contain constants, default methods, and static methods.

• Example: interface Animal { void eat(); } class Dog implements Animal { public void eat() { System.out.println("Dog is eating"); }}

String Builder is mutable, String Buffer is synchronized.

• String Builder is faster as it is not synchronized.

• String Buffer is thread-safe, String Builder is not.

• String Builder should be used in single-threaded environments, String Buffer in multi-threaded.

• Example: StringBuilder sb = new StringBuilder(); StringBuffer buff = new StringBuffer();

Final is a keyword used to declare a constant, finalize is a method used for cleanup operations, and finally is a block used in exception handling.

• Final keyword is used to declare a constant value.

• Finalize method is used for cleanup operations before an object is destroyed.

• Finally block is used in exception handling to execute code after try/catch blocks.

Merge two arrays of strings and print the result

• Create a new array and concatenate the elements of the two arrays

• Use a loop to iterate through both arrays and add elements to the new array

• Print the merged array

OOPS Concept function

• OOPS (Object-Oriented Programming) is a programming paradigm that uses objects to represent and manipulate data.

• Functions in OOPS are methods that are defined within a class and can be called to perform specific tasks.

• Functions in OOPS encapsulate behavior and can have parameters and return values.

• Functions can be public, private, or protected depending on their accessibility.

• Inheritance, polymorphism, and encapsulation are key concepts in OOPS that apply...read more

A constructor is a special type of method in a class that is automatically called when an object of that class is created.

• Constructors have the same name as the class they belong to

• They are used to initialize the object's state

• Constructors can have parameters to customize the initialization process

Deadlock is a situation in which two or more processes are unable to proceed because each is waiting for the other to release a resource.

• Occurs in multitasking environments

• Caused by a circular wait, hold and wait, no preemption, and mutual exclusion

• Examples include two processes waiting for each other to release a lock or resource

Calculate the sum of digits in a given number.

• Iterate through each digit of the number and add them together.

• Use modulo operator to extract each digit.

• Convert the number to a string to easily access individual digits.

Abstraction focuses on hiding unnecessary details, while encapsulation involves bundling data and methods together.

• Abstraction allows us to focus on essential details and ignore irrelevant information.

• Encapsulation helps in data hiding and protecting data integrity by restricting access to certain components.

• Abstraction is like a car dashboard showing only necessary information, while encapsulation is like a car engine where internal workings are hidden.

• Abstraction is achieve...read more

Threads in Java allow for concurrent execution of multiple tasks within a single program.

• Threads are lightweight sub-processes within a program.

• They allow for parallel execution of tasks, improving performance.

• Java provides built-in support for creating and managing threads using the Thread class.

• Example: Creating a new thread - Thread myThread = new Thread(() -> { // task to be executed });

• Example: Starting a thread - myThread.start();