RevGurus Info India Interview Questions and Answers

I am motivated to join your organization because of the innovative projects and collaborative work environment.

• Exciting and innovative projects at your organization

• Collaborative work environment that fosters growth and learning

• Opportunity to work with a talented team and contribute to impactful solutions

The 'this' keyword in programming is used to refer to the current object or instance of a class.

• Used to access instance variables and methods within a class.

• Helps differentiate between local and instance variables with the same name.

• Can be used to pass the current object as a parameter to another method.

• Commonly used in object-oriented programming languages like Java and JavaScript.

Final, finalize, and finally have different meanings in programming.

• Final is a keyword used in Java to declare a constant variable.

• Finalize is a method in Java used for cleanup operations before an object is garbage collected.

• Finally is a block of code in exception handling that is always executed, regardless of whether an exception is thrown.

You can access a class in CSS by using the class selector.

• Use a period followed by the class name to select the class in CSS (e.g. .classname).

• Apply styles to the selected class using curly braces and CSS properties (e.g. .classname { color: blue; }).

The four pillars of Java are encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Polymorphism: The ability of an object to take on many forms.

• Abstraction: Hiding the implementation details and showing only the necessary features of an object.

Four common SQL commands are SELECT, INSERT, UPDATE, and DELETE.

• SELECT: Retrieves data from a database table

• INSERT: Adds new records to a table

• UPDATE: Modifies existing records in a table

• DELETE: Removes records from a table

A join in SQL is used to combine rows from two or more tables based on a related column between them.

• Joins are used to retrieve data from multiple tables based on a related column

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

Inheritance in programming allows a class to inherit properties and behaviors from another class.

• Types of inheritance include single inheritance, where a class inherits from only one parent class.

• Multiple inheritance, where a class inherits from more than one parent class.

• Multilevel inheritance, where a class inherits from a derived class, which in turn inherits from another class.

• Hierarchical inheritance, where multip...read more

OOP is a programming paradigm while Java is a programming language that supports OOP principles.

• OOP is a programming paradigm that focuses on objects and classes, while Java is a programming language that supports OOP principles.

• Java is a popular programming language that follows OOP concepts such as inheritance, encapsulation, and polymorphism.

• OOP allows for the creation of reusable code through the use of classes and...read more

Yes, Java is truly an object-oriented programming language.

• Java supports the four key principles of object-oriented programming: encapsulation, inheritance, polymorphism, and abstraction.

• Everything in Java is an object, except for primitive data types like int, float, etc.

• Java allows for the creation of classes and objects, which can have attributes and methods.

• Java supports inheritance, allowing classes to inherit att

A friendly function in programming is a function that is not a member of a class but has access to the private and protected members of the class.

• A friendly function is declared with the 'friend' keyword in C++.

• It allows the function to access private and protected members of a class.

• Example: class A { private: int x; friend void display(A obj) { cout << obj.x; }}

Constructors and destructors are special methods in Java used to initialize and clean up objects, respectively.

• Constructors are used to initialize an object when it is created. They have the same name as the class and do not have a return type.

• Destructors are used to clean up resources before an object is destroyed. However, Java does not have explicit destructors like C++.

• Constructors can be overloaded, allowing multi...read more

The ternary operator in Java is a conditional operator that takes three operands.

• It is denoted by the ? : symbols.

• It is used as a shorthand for if-else statements.

• Example: int x = (a > b) ? a : b; // assigns the larger of a and b to x

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

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

• Method overriding involves redefining a method in a subclass with the same name and parameters as in the sup...read more

Classes are blueprints for creating objects in object-oriented programming, while objects are instances of classes.

• Classes define the properties and behaviors of objects

• Objects are instances of classes that can hold data and perform actions

• Classes can inherit properties and behaviors from other classes

• Objects can interact with each other through methods and properties

Basic HTML tags are used to structure and format content on a web page.

• HTML tags are used to define the structure of a webpage.

• Tags are enclosed in angle brackets, like <tag>.

• Some common tags include <h1> for headings, <p> for paragraphs, and <a> for links.

• Attributes can be added to tags to provide additional information or functionality.

• Example: <h1>This is a heading</h1>

Yes, I am open to relocation for the right opportunity.

• I am willing to relocate for the right job opportunity

• I am open to exploring new cities and cultures

• I have experience moving for previous jobs or education

• I am flexible and adaptable to new environments

I prefer working in a collaborative team environment where I can bounce ideas off of others and learn from their expertise.

• Collaborative team environment

• Opportunities to learn from others

• Ability to bounce ideas off of colleagues