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Exam 8: Arrays

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Question 31

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Which of the following println statements will display the last myScores element in an array of 10?

A) System.out.println(vals[0]) ;
B) System.out.println(vals[1]) ;
C) System.out.println(vals[9]) ;
D) System.out.println(vals[10]) ;

E) A) and B)
F) B) and D)

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Question 32

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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.

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for(sub = 0; sub
 ...

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Question 33

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When you create an array variable, memory space is automatically reserved.

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'.

Match each term with the correct statement below.

If a class has only a default constructor, you must call the constructor using the keyword ____ for each declared array element.

Individual array elements are ____ by value when a copy of the value is made and used within the receiving method.

A(n) ____ loop allows you to cycle through an array without specifying the starting and ending points for the loop control variable.

double[] studentScores; double studentScores[]; Are both of the above statements valid for declaring an array variable? Why or why not?

When any ____ type ( boolean , char , byte , short , int , long , float , or double ) is passed to a method, the value is passed.

When working with arrays, why is it beneficial to use a loop with a declared constant equal to the size of the array?

When you want to determine whether a variable holds one of many valid values, one option is to use a do…while loop to compare the variable to a series of valid values.

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.

When any primitive type is passed to a method, the ____________________ is passed.

A(n) ____ is an integer contained within square brackets that indicates one of an array's variables.

Providing values for all the elements in an array is called ____ the array.

String[] countyNames = {"Clark", "Delaware", "Madison"}; Using the above statement, what will be the value of countyNames[0] , countyNames[1] , and countyNames[2] ?

When you create an array of objects, each reference is assigned the value ____.

Write the statement to declare an array variable named studentScores with type double . Write a second statement to create an array of 10 objects of type double .

Many programmers feel that breaking out of a for loop early disrupts the loop flow and makes the code harder to understand.