V-Count Interview Questions and Answers

In Java, 'oops' refers to Object-Oriented Programming concepts like classes, objects, inheritance, polymorphism, and encapsulation.

• Oops stands for Object-Oriented Programming.

• It involves concepts like classes, objects, inheritance, polymorphism, and encapsulation.

• Java is an object-oriented programming language that follows oops principles.

Linux command is a command-line interface used in Linux operating systems to perform various tasks.

• Linux commands are case-sensitive

• Commands are typically followed by options and arguments

• Common Linux commands include ls, cd, mkdir, rm, cp, mv, grep, and more

A function is a block of code that performs a specific task when called.

• Functions can take input parameters and return output values

• Functions can be reused multiple times in a program

• Examples: summing two numbers, finding the maximum value in an array

A class in Java is a blueprint for creating objects, defining their properties and behaviors.

• Classes are used to create objects in Java

• Classes can have attributes (fields) and methods

• Classes can be extended to create subclasses

• Example: class Car { String color; void start() { // code here } }

A for loop is a control flow statement that allows code to be executed repeatedly based on a specified condition.

• Used to iterate over a sequence of elements

• Consists of initialization, condition, and increment/decrement expressions

• Example: for(int i=0; i<5; i++) { // code to be executed }

SQL is a relational database management system, while NoSQL is a non-relational database management system.

• SQL is table-based, with a predefined schema, while NoSQL is document-based, key-value pairs, graph databases, or wide-column stores.

• SQL is structured query language for defining and manipulating the data, while NoSQL does not use SQL for querying the data.

• SQL is vertically scalable, while NoSQL is horizontally sc...read more