Exam 8: Arrays
Exam 1: Creating Your First Java Classes76 Questions
Exam 2: Using Data81 Questions
Exam 3: Using Methods, Classes and Objects79 Questions
Exam 4: More Object Concepts84 Questions
Exam 5: Making Decisions80 Questions
Exam 6: Looping77 Questions
Exam 7: Characters, Strings and the Stringbuilder82 Questions
Exam 8: Arrays77 Questions
Exam 9: Advanced Array Concepts80 Questions
Exam 10: Introduction to Inheritance78 Questions
Exam 11: Advanced Inheritance Concepts78 Questions
Exam 12: Exception Handling79 Questions
Exam 13: File Input and Output78 Questions
Exam 14: Introduction to Swing Components79 Questions
Exam 15: Using Javafx and Scene Builder65 Questions
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The length ____ contains the number of elements in the array.
(Multiple Choice)
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public static int[] sampleArray()
{
int studentScores = {72, 91, 83};
____
}
Using the above code, write the statement that will return the array name.
(Short Answer)
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When an application contains an array and you want to use every element of the array in some task, it is common to perform loops that vary the loop control variable from 0 to one less than the size of the array.
(True/False)
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Write the statement to declare an array of integers that will hold studentScores .
(Essay)
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double[] studentScores;
double studentScores[];
Are both of the above statements valid for declaring an array variable? Why or why not?
(Essay)
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When you declare int[] someNums = new int[10]; , each element of someNums has a value of ____.
(Multiple Choice)
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What is different about passing an array to a method rather than passing a primitive type to a method?
(Essay)
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How would a programmer perform a range match when writing an application that takes into consideration different discount rates for customers? Give an example.
(Essay)
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Since an array name is a reference, you are able to use the = operator for assigning and the == operator for comparisons.
(True/False)
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The following statement declares an array:
int[] scoreArray = {2, 14, 35, 67, 85};
final int INCREASE = 3;
Create a loop that will add INCREASE to every array element. Use the length field in the loop that will contain the number of elements in the array.
(Essay)
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Match each term with the correct statement below.
Premises:
Declared in the same way you declare any simple variable, but with square brackets
Responses:
elements
int
passed by value
Correct Answer:
Premises:
Responses:
(Matching)
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In Java, boolean array elements automatically are assigned the value ____.
(Multiple Choice)
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An instance variable or object field is also called a(n) ____ of the object.
(Multiple Choice)
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When you declare or access an array, you can use any expression to represent the size, as long as the expression is _____.
(Multiple Choice)
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When array elements are passed by value, a copy of the value is made and used within the receiving method.
(True/False)
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When populating an array with an initialization list, you do not need to use the new keyword or provide an array size. Explain why this is the case.
(Essay)
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Match each term with the correct statement below.
Premises:
Hold memory addresses where values are stored
Responses:
array variable
reference types
enhanced for loop
Correct Answer:
Premises:
Responses:
(Matching)
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How would you use a method that belongs to an object that is part of the array? Use an example and demonstrate with Java code.
(Essay)
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When you declare an array name, no computer memory address is assigned to it. Instead, the array variable name has the special value ____, or Unicode value '\u0000'.
(Multiple Choice)
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When working with arrays, why is it beneficial to use a loop with a declared constant equal to the size of the array?
(Essay)
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