JC Software Solutions Interview Questions and Answers

Armstrong number is a number whose sum of cubes of its digits is equal to the number itself.

• Armstrong number is also known as Narcissistic number.

• For example, 153 is an Armstrong number because 1^3 + 5^3 + 3^3 = 153.

• The coding logic involves breaking down the number into its individual digits, cubing them, and then adding them up.

• Finally, the sum is compared with the original number to determine if it is an Armstrong number or not.

Strings are immutable sequences of characters while lists are mutable sequences of objects.

• Strings are enclosed in quotes while lists are enclosed in square brackets.

• Strings cannot be modified while lists can be modified using various methods.

• Strings are used to represent text while lists are used to store collections of objects.

• Strings have limited functionality compared to lists which have a wide range of methods and operations.

• Example of string: 'Hello World', Example of l...read more

HTML is a markup language for creating web pages, CSS is used for styling those pages, and JavaScript is used for adding interactivity.

• HTML stands for HyperText Markup Language and is used to create the structure of web pages.

• CSS stands for Cascading Style Sheets and is used to style the HTML elements on a web page.

• JavaScript is a programming language that is used to add interactivity, animations, and dynamic content to web pages.

• HTML example: <h1>This is a heading</h1>

• CSS ex...read more

HTML is a markup language used for creating web pages.

• HTML stands for HyperText Markup Language

• It is used to structure content on the internet

• HTML tags are used to define elements such as headings, paragraphs, images, links, etc.

• Example: <h1>This is a heading</h1>

JVM stands for Java Virtual Machine. It is a virtual machine that enables a computer to run Java programs.

• JVM is platform-independent and converts Java bytecode into machine code.

• It provides features like memory management, garbage collection, and security.

• JVM has different implementations like HotSpot, OpenJ9, and GraalVM.

Encapsulation is the concept of bundling data and methods that operate on the data into a single unit, known as a class.

• Encapsulation helps in hiding the internal state of an object and restricting access to it.

• It allows for data hiding, which prevents outside code from directly accessing an object's internal state.

• Access to the data is typically provided through public methods, which are known as getters and setters.

• Encapsulation promotes code reusability and modularity by o...read more

HTTP is unsecured protocol while HTTPS is secured protocol using SSL/TLS encryption.

• HTTP stands for Hypertext Transfer Protocol, while HTTPS stands for Hypertext Transfer Protocol Secure.

• HTTP operates on port 80, while HTTPS operates on port 443.

• HTTP does not encrypt data, while HTTPS encrypts data using SSL/TLS.

• HTTPS provides authentication and data integrity, while HTTP does not.

• Examples: HTTP - http://example.com, HTTPS - https://example.com

A pointer is a variable that stores the memory address of another variable.

• Pointers are used to access and manipulate memory directly.

• They are often used in programming languages like C and C++.

• Example: int *ptr; // declares a pointer to an integer variable