RPSC Programmer Paper-2 Solved Questions

Option D

A questionnaire is a fact-finding technique where the analyst prepares a set of structured questions and distributes them to many users. Because users can fill them out independently, this technique allows analysts to:

• Collect data from a large number of people.
• Gather information quickly.
• Reach people who may not be available for interviews.
• Standardize responses for easier comparison.

This is why questionnaires are preferred when the analyst needs large-scale data collection in less time.

Option B

In JSP (Java Server Pages) technology, JSP pages are first translated into Java servlets. These servlets are then compiled and executed by the web server. This allows JSP to create dynamic and interactive web pages.
<%@ page language="java" %>
<html>
<body>
    <h1>Hello, JSP Example</h1>
    <%
        String name = "Suresh";
        out.println("Welcome, " + name);
    %>
</body>
</html>

When you save this file as myfile.jsp and run it on a server like Tomcat, the server automatically converts it into a servlet like this:
public final class myfile_jsp extends HttpJspBase {
    public void _jspService(HttpServletRequest request,
                            HttpServletResponse response)
                     throws IOException, ServletException {
        response.setContentType("text/html");
        JspWriter out = response.getWriter();
        out.write("<html><body>");
        out.write("<h1>Hello, JSP!</h1>");
        String name = "Suresh";
        out.write("Welcome, " + name);
        out.write("</body></html>");
    }
}

Option B

Abstract Systems are conceptual and non-physical entities that represent ideas, models, or formulas of real systems. They do not exist physically but serve as representations or theoretical constructs to study, analyze, or simulate how a real system functions.
Abstract Systems are conceptual, meaning they do not have a physical form. They exist as ideas, models, formulas, diagrams, or representations of a real system. Examples included, mathematical formulas, economic models, organizational charts, logical flow diagrams, theoretical computer models etc.

Option C

Java is widely used for Internet and web-based applications because of several important features. One of the key requirements for Internet applications is that programs must run on different platforms without modification and support networked or distributed computing.
Java fulfills these requirements through its Portability, meaning compiled Java bytecode can run on any system with a Java Virtual Machine (JVM), and its ability to work in a Distributed environment, allowing objects and programs to communicate over networks.

Option C

A Data Dictionary is a centralized, structured repository that contains metadata, information about the data used in a system, such as:

• Names of data elements.
• Data types and formats.
• Relationships between data items.
• Default values or constraints.

Option A

When a big program becomes too large to understand, we divide it into small manageable modules. To show how these modules are arranged and how they communicate, we use a special tool called a Structure Chart.
It looks like a Tree Diagram where the top represents the main module and the bottom branches represent submodules.

• So, a Structure Chart is the program development tool that graphically shows how a program is divided into modules, their hierarchy, organization, and communication.

Option A

In Java, numbers can be represented in different formats, such as decimal, octal, hexadecimal, and binary. By default, numbers written without any prefix are decimal numbers (base 10).
However, if a number starts with a 0, Java treats it as an octal number (base 8). Octal numbers use digits from 0 to 7 only.
If a number starts with 0x, Java treats it as an hexadecimal number (base 16). Hexadecimal numbers use digits from 0 to 9 and a to f.

In the given program, the array is declared as int[] arr = {120, 200, 016};. Here, 120 and 200 are standard decimal numbers. The third element, 016, starts with a 0, so Java interprets it as an octal number. To understand its decimal value, we convert octal 16 to decimal, 1×8¹+6×8⁰ = 8+6 = 14. Therefore, the array actually contains the values {120, 200, 14}.
The for loop then iterates through this array and prints each element followed by a space. As a result, the output of the program is 120 200 14.

Option C

In Java, a method is a block of code that performs a specific task. One of the core features of Java is Polymorphism, which allows objects or methods to take multiple forms.
Method overloading is a type of compile-time polymorphism where a class has two or more methods with the same name but different parameter lists.

• The method name remains the same.
• The parameters must differ in type, number, or sequence (order).
• The return type of method does not play any role in method overloading.

It allows programmers to use the same method name for related actions, improving readability and organization.

class Calculator {
    int add(int a, int b) {
        return a + b;
    }
    int add(int a, int b, int c) {
        return a + b + c;
    }
    double add(double a, double b) {
        return a + b;
    }
}
public class Main {
    public static void main(String[] args) {
        Calculator calc = new Calculator();
        System.out.println(calc.add(15, 25));     
        System.out.println(calc.add(15, 12, 30));  
        System.out.println(calc.add(2.5, 7.5));
    }
}

Option C

In this code, the class Example has a private instance variable named var. The constructor Example(int var) receives a parameter with the same name. Inside the constructor, the statement this.var = var; is used to distinguish between the instance variable and the constructor parameter.
Here, this.var refers to the instance variable of the current object, while var refers to the parameter. Therefore, the code simply assigns the value passed into the constructor to the object's own variable.

Option D

The Java Development Kit (JDK) is a software development kit provided by Java to help programmers develop Java applications. It contains tools for writing, compiling, and running Java programs. 
The JDK includes the Java Compiler (javac) to convert source code into bytecode, the Java Runtime Environment (JRE) to execute Java programs, and other development tools such as debuggers and documentation generators.