Object-Oriented Programming Fundamentals
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Questions and Answers

What programming technique organizes programs as an interactive collection of objects?

  • Procedure Oriented Programming
  • Object Oriented Programming (correct)
  • Functional Programming
  • Modular Programming

    • Which characteristic of Object Oriented Programming simplifies the interface by hiding complexity?

  • Polymorphism
  • Inheritance
  • Abstraction (correct)
  • Encapsulation

    • What operator is utilized to access members of an object?

  • - (minus)
  • + (plus)
  • . (dot) (correct)
  • / (divide)

    • Which of the following modifiers can be used in a class definition?

    <p>Both public and default</p> Signup and view all the answers

    Which name below is valid for a class in programming?

    <p>SimpleInterest</p> Signup and view all the answers

    Which of the following represents a valid object name?

    <p>obj1</p> Signup and view all the answers

    What is a valid float literal in programming?

    <p>Both A and B</p> Signup and view all the answers

    Which type of literal is represented by the character 'A'?

    <p>Char</p> Signup and view all the answers

    What is the result of the expression int n = (q-p)>(p-q)?(q-p):(p-q) when p = 5 and q = 19?

    <p>14</p> Signup and view all the answers

    Why is a class referred to as an object factory?

    <p>Objects can be instantiated from a class.</p> Signup and view all the answers

    What is operator associativity?

    <p>The method that dictates how operators of the same precedence are evaluated.</p> Signup and view all the answers

    Which of the following statements about accumulator and counter is true?

    <p>An accumulator totals values, while a counter tracks counts.</p> Signup and view all the answers

    What does a class encapsulate?

    <p>Both data members and methods.</p> Signup and view all the answers

    Which keyword represents the access specifier used in a class declaration?

    <p>public</p> Signup and view all the answers

    What Java concept is implemented through abstraction?

    <p>Hiding unnecessary details and showing essential features.</p> Signup and view all the answers

    What is the correct output of the given program segment that includes a for loop: for (i = 5 : i > 10; i ++)?

    <p>20</p> Signup and view all the answers

    How can the following while loop be converted to a for loop? while (n>=1) { System.out.println(m*n); n–; }

    <p>for (n = 10; n &gt;= 1; n--) { System.out.println(m*n); }</p> Signup and view all the answers

    Which statement correctly replaces the if-else sequence with a ternary operator for checking even or odd numbers?

    <p>System.out.print((x%2==0) ? &quot;EVEN&quot; : &quot;ODD&quot;);</p> Signup and view all the answers

    How is the following do-while loop converted to a for loop: do { d=d*2; System.out.println(d); i++; } while (i...?

    <p>for (i = 1; i &lt;= 5; i++) { d = d * 2; System.out.println(d); }</p> Signup and view all the answers

    What is the value of the variable 'e' in the program calculating the sum of 15, 36, and 45 subtracted from 100?

    <p>5</p> Signup and view all the answers

    What will the output be for the program that prints the names of five fruits using a single System.out.println()?

    <p>Apple Orange Guava Banana Lemon</p> Signup and view all the answers

    In the program calculating the area and perimeter of a square, how is the perimeter calculated?

    <p>p = 4 * s</p> Signup and view all the answers

    Which of the following correctly calculates the area of a rectangle with length 12cm and breadth 8cm?

    <p>a = 12 * 8</p> Signup and view all the answers

    What will be printed if the program calculating the sum, difference, and product of 12.35 and 7.3 is executed?

    <p>Sum=19.65 Difference=5.05 Product=90.155</p> Signup and view all the answers

    What variable type is used to calculate the area of a square in the program?

    <p>float</p> Signup and view all the answers

    What is the correct formula used to find the perimeter of a rectangle in the provided program?

    <p>p = 2 * (l + b)</p> Signup and view all the answers

    What happens if the dimensions for the area of a rectangle are mistakenly defined as floats instead of ints?

    <p>The area and perimeter can still be calculated correctly.</p> Signup and view all the answers

    Which symbol is used to represent a single-line comment in programming?

    <p>//</p> Signup and view all the answers

    What will be the output of the switch statement when opn = 'b'?

    <p>Robust and Secure</p> Signup and view all the answers

    How can the following if-else construct be rewritten using a switch statement: if(var==1) System.out.println(“good”); else if(var==2) System.out.println(“better”); else if(var==3) System.out.println(“best”); else System.out.println(“invalid”);?

    <p>switch(var) { case 1: System.out.println(“good”); break; ...}</p> Signup and view all the answers

    What is the purpose of the break statement in a switch case?

    <p>To stop the execution of the switch block.</p> Signup and view all the answers

    What will be the value of discount when bill = 12000?

    <p>1000</p> Signup and view all the answers

    Which of the following correctly rewrites the given statement using an if..else construct: comm = (sale > 15000) ? sale * 5 / 100 : 0;

    <p>if (sale &gt; 15000) comm = sale * 5 / 100; else comm = 0;</p> Signup and view all the answers

    What occurs if the 'default' case is not included in a switch statement?

    <p>No action is taken if no case matches.</p> Signup and view all the answers

    Which of the following correctly describes the function of the ternary operator?

    <p>It is used to simplify basic if-else statements into a single line.</p> Signup and view all the answers

    What will be the value of y after evaluating the expression: y+=++y + y-- + --y; given int y=8?

    <p>33</p> Signup and view all the answers

    What is the output of the following code snippet? System.out.print(“BEST “); System.out.println(“OF LUCK”);

    <p>BEST OF LUCK</p> Signup and view all the answers

    What will be the output after executing: System.out.println(“Incredible”+“\n”+“world”);?

    <p>Incredible world</p> Signup and view all the answers

    What is the value of z after evaluating the expression: int z=(++y * (y++ + 5)); when int y=10?

    <p>176</p> Signup and view all the answers

    What values will x and y be after the execution of the code: int a = 63, b = 36; boolean x = (a < b) ? true : false; int y = (a > b) ? a : b;

    <p>x=false, y=63</p> Signup and view all the answers

    Study Notes

    Computer Applications Study Notes

    • Computer Applications (ICSE) Solution (X): This is a textbook focusing on computer applications for students in the X grade of the ICSE curriculum.

    Chapter 1 Revision Tour I - Mental Drill

    • Procedure Oriented Programming (POP): An organized programming technique that does not implement programs as an organized collection of interactive objects.
    • Object-Oriented Programming (OOP): This programming technique implements programs as an organized collection of interactive objects.
    • Encapsulation: A characteristic of OOP that hides the program complexities and provides a simple interface.
    • Abstraction: A characteristic of OOP that hides the complexities of the object and provides a simple interface.
    • Operator . (dot): Used to access individual members of an object.
    • Class Modifiers: public and default are modifiers used in a class.
    • Valid Class Name: SimpleInterest is a valid class name.
    • Valid Object Name: obj1 is a valid object name.
    • Concepts: Encapsulation, Abstraction, OOP principles, Data types, and Class/Object names.
    • Revision Tour I: A review of chapter 1 with various multiple choice questions and answers. A practical demonstration of the theoretical concepts.

    Chapter 1 Revision Tour I - Mental Drill (Continued)

    • Float Literal: 12.36f and 12.36F are valid float literals.
    • Octal Integer Literal: 0675 is a valid octal integer literal.
    • Boolean Initialization: boolean f = true; is a valid initialization statement.
    • Punctuator: Not a punctuator example- .(dot).
    • Primitive Data Types: int, float, char, etc.
    • Composite Data Types: class, arrays, interface, etc.
    • Data Types: float, short, int, char, boolean, primitive, composite
    • Inheritance: Does not refer to hiding complexity and providing a simple interface. Refers to encompassing parent class's characteristics and behavior in a child class.
    • Operator Associativity: The rule used to group operators that have the same precedence.
    • Keywords: Reserved words in Java with specific meanings for the compiler. for, if, else, while, etc.
    • Identifiers: Names of variables, methods, classes, packages, and interfaces
    • Literals: Constant values that can be assigned to variables

    Chapter 1 Revision Tour I (Continued)

    • Data types: Int, short, boolean, float, double/ char, primitive/ composite
    • Operators: Arithmetic, assignment, logical, ternary
    • Keywords and modifiers: int,float,boolean,public,default
    • Methods/operators: sqrt(), pow(), string/object manipulation functions
    • Program examples and questions: Covering various OOP concepts and techniques used in practical applications.
    • True/False Statements: Assessment of understanding of the concept and application related to OOP.

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    Description

    Test your knowledge on the basics of Object-Oriented Programming (OOP) with this quiz. Questions cover concepts such as classes, objects, encapsulation, and access specifiers. This quiz is perfect for students learning programming techniques and principles.

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