Java Fundamentals Quiz
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Questions and Answers

What data type is used to declare named constants in Java?

  • Elements
  • Objects
  • Variables
  • Named constants (correct)

What is the value of the last element in the codeArray?

  • 'T' (correct)
  • 'O'
  • 'S'
  • 'I'

What is the subscript of the element '' in the codeArray?

  • 2
  • 5
  • 3 (correct)
  • 4

How many elements does the codeArray have if we add two more elements to it?

<p>13 (C)</p> Signup and view all the answers

What is the purpose of the backslash () in the codeArray?

<p>To escape a single quote (C)</p> Signup and view all the answers

Which concept in Java is often referred to as information hiding?

<p>Encapsulation (C)</p> Signup and view all the answers

What is a primary benefit of using methods in Java programming?

<p>Code reusability (D)</p> Signup and view all the answers

What does the 'divide and conquer' approach refer to in Java programming?

<p>Breaking down complex problems into smaller, more manageable tasks (D)</p> Signup and view all the answers

What would be displayed if the following pseudocode was coded and executed, with salary = 400?

<p>480 (B)</p> Signup and view all the answers

What is the correct way to call a method with an integer parameter in Java?

<p>calculate(int number); (D)</p> Signup and view all the answers

What is the output of the following code?

<p>ArrayIndexOutOfBoundsException (C)</p> Signup and view all the answers

What is the term used to describe the process of passing a value to a method parameter in Java?

<p>Pass by value (D)</p> Signup and view all the answers

What is used to specify the size of an array in Java?

<p>Brackets (C)</p> Signup and view all the answers

Study Notes

Java Fundamentals

  • Encapsulation is often referred to as information hiding.
  • Code reusability is a benefit of using methods in Java.
  • The term "divide and conquer" in Java programming refers to breaking down complex problems into smaller, more manageable tasks.

Methods

  • When calling a method, the correct syntax is calculate(int number);.
  • When you invoke a method with a parameter, the value of the argument is passed to the parameter, which is referred to as pass by value.

Arrays

  • Named constants are usually used to specify the size of an array.
  • In the code char[] codeArray = {'C', 'P', '\'', 'S', 'I', 'Y', '\'', 'C', 'O', 'T'};, the array has 11 elements.
  • The subscript of the first element in the array is 0.
  • The subscript of the last element in the array is 10.
  • The array type is char[].
  • The value stored in codeArray is 'C'.

Control Flow

  • If the following pseudocode was coded and executed, with salary = 400, the output would be 480:
IF salary &gt; 400 THEN
  SET bonus = 10
  SET salary = salary + bonus
ELSE
  SET salary = salary + salary *.20
End IF
DISPLAY salary

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Learn the basics of Java programming, including encapsulation, code reusability, and method syntax. Discover how to break down complex problems and write efficient code.

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