Download REVATURE INTERVIEW COMPREHENSIVE EXAM 2026 QUESTIONS WITH SOLUTIONS GRADED A+ and more Exams Java Programming in PDF only on Docsity!
REVATURE INTERVIEW COMPREHENSIVE EXAM
2026 QUESTIONS WITH SOLUTIONS GRADED
A+
โ Setter/Getter. Answer: Getter and setter methods are used to retrieve and manipulate private variables in a different class. A "getter" method does as it name suggest, retrieves a the attribute of the same name. A "setter" method allows you to set the value of the attribute. โ Setter/Getter Use. Answer: The reason to use getter and setter methods rather than just making the member variables public is because of the principle of information hiding - classes should not reveal their innards to the outside world, because that tightly couples the implementation of the class to whatever is in the outside world. That's bad, because if you tightly couple lots of classes together in a larger program, the program will become a big, entangled mess that's hard to maintain. โ Override. Answer: Two methods with the same method name and parameters (i.e., method signature). Vertical along parent-child hierarchy. Takes place at different levels of inheritance but involves functions with the SAME name and the SAME number/type of parameters.
โ Overload. Answer: Method overloading is the ability to define several methods all with the same name. Horizontal - takes place at the SAME level of inheritance within a class hierarchy. Same name but different types/number of parameters. โ Stored Procedure. Answer: The real power of stored procedures is the ability to pass parameters and have the stored procedure handle the differing requests that are made. CREATE PROCEDURE dbo.uspGetAddress @City nvarchar(30) AS SELECT * FROM Person.Address WHERE City = @City GO EXEC dbo.uspGetAddress @City = 'New York' โ Constructor in Java. Answer: A constructor in Java is a block of code similar to a method that's called when an instance of an object is created. โ Modulo/Modulus Operator. Answer: In computing, the modulo operation finds the remainder after division of one number by another.
โ Wrapper Class. Answer: Wrapper classes are used to convert any data type into an object. โ Mutable String. Answer: Mutable means it has fields that can be changed โ Database Normilization. Answer: is the process of organizing the columns (attributes) and tables (relations) of a relational database to reduce data redundancy and improve data integrity. โ Find product of 2 numbers without multiplication operator. Answer: Create loop to add # to itself the amount of times it needs to โ Unions in SQL. Answer: Use a union query to combine multiple queries into a single result โ Class/Object. Answer: A class is simply a representation of a type of object. It is the blueprint, or plan, or template, that describes the details of an object. A class is a blueprint from which the individual objects are created. Class is composed of three things: a name, attributes, and operations. โ MVC Model. Answer:
โ Core Principles of OOP. Answer: Encapsulation, Abstraction, Inheritance, Polymorphism. โ "==" and "===". Answer: "===" checks to see if expressions are the same as well as being equal โ Inner Join. Answer: The INNER JOIN keyword selects records that have matching values in both tables. โ Hashtable. Answer: A HashMap is basically an array with lots of numbers, and the key lets you identify which value in that array or map of values to use. The HashMap class is how you implement the map interface โ Hashmap. Answer: Hashtable class stores key/value pairs in a hash table. When using a Hashtable, you specify an object that is used as a key, and the value that you want linked to that key. โ Foreign Key. Answer: A foreign key is a set of one or more columns in a table that refers to the primary key in another table. There isn't any special code, configurations, or table definitions you need to place to officially "designate" a foreign key. โ Primary Key. Answer: The primary key consists of one or more columns whose data contained within is used to uniquely identify each
variable: private static int i = 0; and you increment it ( i++ ) in one instance, the change will be reflected in all instances. โ Access Modifiers. Answer: private default protected public โ Encapsulation. Answer: Encapsulation can be used to hide data members and member's function. Under this definition, encapsulation means that the internal representation of an object is generally hidden from view outside of the object's definition. Encapsulation is used to hide the values or state of a structured data object inside a class, preventing unauthorized parties' direct access to them. Hiding the internals of the object protects its integrity by preventing users from setting the internal data of the component into an invalid or inconsistent state. โ Inheritance. Answer: In object-oriented programming (OOP), inheritance describes a relationship between two classes in which one class (the child class) subclasses the parent class. The child inherits methods and attributes of the parent, allowing for shared functionality. For example, one might create a variable class Mammal with features such as eating, reproducing, etc.; then define a child class Cat that inherits those features without having to explicitly program them, while adding new features like chasing mice.
โ Multiple inheritance in Java. Answer: Multiple inheritance allows programmers to use more than one totally orthogonal hierarchy simultaneously, such as allowing Cat to inherit from Cartoon character and Pet and Mammal and access features from within all of those classes. (Java does not support). โ What does "$" mean in JQuery? Answer: define/access jQuery โ List. Answer: It represents an ordered list of objects, meaning you can access the elements of a List in a specific order, and by an index too. You can also add the same element more than once to a List. โ Set. Answer: A Set is a Collection that cannot contain duplicate elements โ Package. Answer: "Folders" that organizes a set of related classes and interfaces โ How to design a class? Answer: SRP - The Single Responsibility Principle - A class should have one, and only one, reason to change. OCP - The Open Closed Principle - Should be able to extend any classes' behaviors, without modifying the classes.
โ Abstraction. Answer: Abstraction is an emphasis on the idea, qualities and properties rather than the particulars (a suppression of detail). The importance of abstraction is derived from its ability to hide irrelevant details and from the use of names to reference objects. โ Generalization. Answer: Generalization is the broadening of application to encompass a larger domain of objects of the same or different type. Programming languages provide generalization through variables, parameterization, generics and polymorphism. It places the emphasis on the similarities between objects. Thus, it helps to manage complexity by collecting individuals into groups and providing a representative which can be used to specify any individual of the group. โ ASP.NET. Answer: โ Relational Database Management System (RDBMS). Answer: RDBMS data is structured in database tables, fields and records. Each RDBMS table consists of database table rows. Each database table row consists of one or more database table fields. RDBMS store the data into collection of tables, which might be related by common fields (database table columns). RDBMS also provide relational operators to manipulate the data stored into the database tables. Most RDBMS use SQL as database query language.
The most popular RDBMS are MS SQL Server, DB2, Oracle and MySQL. โ SQL Statements. Answer: โ HyperText Markup Language (HTML). Answer: Main markup language for displaying web pages and other information that can be displayed in a web browser. HTML is written in the form of HTML elements consisting of tags enclosed in angle brackets (like ), within the web page content. HTML tags most commonly come in pairs like and , although some tags, known as empty elements, are unpaired, for example . The first tag in a pair is the start tag, the second tag is the end tag (they are also called opening tags and closing tags). In between these tags web designers can add text, tags, comments and other types of text-based content. The purpose of a web browser is to read HTML documents and compose them into visible or audible web pages. The browser does not display the HTML tags, but uses the tags to interpret the content of the page. HTML elements form the building blocks of all websites. HTML allows images and objects to be embedded and can be used to create interactive forms. It provides a means to create structured documents by denoting
โ HTML Forms. Answer: โ Javascript. Answer: This is a lightweight programming language used to make web pages dynamic and user friendly. โ Cascading Style Sheets (CSS). Answer: The technology used to style HTML pages. โ jQuery. Answer: This is a JavaScript library that makes common functions and tasks easy to do that are done all the time in JavaScript โ eXtensible Markup Language (XML). Answer: This is a file type that allows you to organize data. โ Systems Development Life Cycle (SDLC). Answer: SDLC (Software Development Life Cycle) is the process of developing software through business needs, analysis, design, implementation and maintenance โ SDLC steps. Answer: 1. Requirements
- Design & Architecture
- Development & Coding
- Quality Assurance & Software Testing
- Implementation
- Maintenance & Support
โ C#. Answer: C# (pronounced "C sharp") is a simple, modern, object- oriented, and type-safe programming language. It will immediately be familiar to C and C++ programmers. C# combines the high productivity of Rapid Application Development (RAD) languages and the raw power of C++. Visual C# .NET is Microsoft's C# development tool. It includes an interactive development environment, visual designers for building Windows and Web applications, a compiler, and a debugger. Visual C# .NET is part of a suite of products, called Visual Studio .NET, that also includes Visual Basic .NET, Visual C++ .NET, and the JScript scripting language. All of these languages provide access to the Microsoft .NET Framework, which includes a common execution engine and a rich class library. The .NET Framework defines a "Common Language Specification" (CLS), a sort of lingua franca that ensures seamless interoperability between CLS-compliant languages and class libraries. For C# developers, this means that even though C# is a new language, it has complete access to the same rich class libraries that are used by seasoned tools such as Visual Basic .NET and Visual C++ .NET. C# itself does not include a class library. โ JAVA. Answer: Java is a programming language originally developed by James Gosling at Sun Microsystems (which has since merged into
OOP is a design philosophy. It stands for Object Oriented Programming. Object-Oriented Programming (OOP) uses a different set of programming languages than old procedural programming languages (C, Pascal, etc.). Everything in OOP is grouped as self sustainable "objects". Hence, you gain reusability by means of four main object-oriented programming concepts. In order to clearly understand the object orientation model, let's take your "hand" as an example. The "hand" is a class. Your body has two objects of the type "hand", named "left hand" and "right hand". Their main functions are controlled or managed by a set of electrical signals sent through your shoulders (through an interface). So the shoulder is an interface that your body uses to interact with your hands. The hand is a well-architected class. The hand is being reused to create the left hand and the right hand by slightly changing the properties of it. โ Polymorphism. Answer: In object-oriented programming, polymorphism (from the Greek meaning "having multiple forms") is the characteristic of being able to assign a different meaning or usage to something in different contexts - specifically, to allow an entity such as a variable, a function, or an object to have more than one form. More specifically, it is the ability to redefine methods for derived classes. For example, given a base class shape, polymorphism enables the programmer to define different area methods for any number of derived classes, such as circles, rectangles and triangles. No matter what shape an object is, applying the area method to it will return the correct results.
