Question 1

In array items, which expression below accesses the value at row 3 and column 4?

Accepted Answer

A)   items[3].[4]
B)   items[3[4]]
C)   items[3][4]
D)   items[3, 4]E) B) and D)
F) None of the above

Question 2

Which of the following will not produce a compiler error?

Accepted Answer

A)   Changing the value of a constant after it is initialized.
B)   Changing the value at a given index of an array after it is created.
C)   Using a final variable before it is initialized.
D)   All of the above will produce compiler errors.E) C) and D)
F) A) and C)

Question 3

Attempting to access an array element outside of the bounds of an array, causes a(n)  .

Accepted Answer

A)   ArrayOutOfBoundsException.
B)   ArrayElementOutOfBoundsException.
C)   ArrayIndexOutOfBoundsException.
D)   ArrayException.E) A) and B)
F) A) and C)

Question 4

Which expression adds 1 to the element of array arrayName at index i?

Accepted Answer

A)   ++arrayName[i].
B)   arrayName++[i].
C)   arrayName[i++].
D)   None of the above.E) None of the above
F) All of the above

Question 5

Which of the following statements creates a multidimensional array with 3 rows, where the first row contains 1 element, the second row contains 4 elements and the final row contains 2 elements?

Accepted Answer

A)   int[][] items = {{1, null, null, null}, {2, 3, 4, 5}, {6, 7, null, null}};
B)   int[][] items = {{1}, {2, 3, 4, 5}, {6, 7}};
C)   int[][] items = {{1}, {2, 3, 4, 5}, {6, 7}, {}) ;
D)   int[][] items = {{1}, {4}, {2}};E) A) and C)
F) A) and B)

Question 6

Invalid possibilities for array indices include .

Accepted Answer

A)   Positive integers.
B)   Negative integers.
C)   Zero.
D)   None of the above.E) A) and B)
F) C) and D)

Question 7

Constant variables also are called .

Accepted Answer

A)   write-only variables
B)   finals
C)   named constants
D)   All of the aboveE) C) and D)
F) None of the above

Question 8

Consider the array:
S[0] = 7
S[1] = 0
S[2] = -12
S[3] = 9
S[4] = 10
S[5] = 3
S[6] = 6
The value of s[s[6] - s[5]] is:

Accepted Answer

A)   0 .
B)   3.
C)   9.
D)   0.E) None of the above
F) A) and D)

Question 9

What do the following statements do?
Double[] array;
Array = new double[14];

Accepted Answer

A)   Create a double array containing 13 elements.
B)   Create a double array containing 14 elements.
C)   Create a double array containing 15 elements.
D)   Declare but do not create a double array.E) A) and D)
F) A) and C)

Question 10

Exception handling helps you create ________ programs.

Accepted Answer

A)   high-performance
B)   logic-error-free
C)   fault-tolerant
D)   compilation-error-freeE) B) and C)
F) All of the above

Question 11

Class ________ represents a dynamically resizable array-like data structure.

Accepted Answer

A)   Array
B)   ArrayList
C)   Arrays
D)   None of the above.E) B) and C)
F) A) and D)

Question 12

Which method sets the background color of a JPanel?

Accepted Answer

A)   setBack.
B)   setBackground.
C)   setBackgroundColor.
D)   setColor.E) B) and C)
F) A) and D)

Question 13

Which of the following statements about arrays are true?
A. An array is a group of variables containing values that all have the same type.
B.Elements are located by index.
C. The length of an array c is determined by the expression c.length() ;.
D. The zeroth element of array c is specified by c[0].

Accepted Answer

A)   A, C, D.
B)   A, B, D.
C)   C, D.
D)   A, B, C, D.E) None of the above
F) A) and D)

Question 14

Which of the following statements is false?

Accepted Answer

A)   When an argument is passed by reference, the called method can access the argument's value in the caller directly but cannot modify it.
B)   All arguments in Java are passed by value.
C)   To pass an individual array element to a method, use the indexed name of the array.
D)   To pass an object reference to a method, simply specify in the method call the name of the variable that refers to the object.E) All of the above
F) A) and D)

Question 15

A programmer must do the following before using an array:

Accepted Answer

A)   declare then reference the array.
B)   create then declare the array.
C)   create then reference the array.
D)   declare then create the array.E) C) and D)
F) A) and B)

Question 16

When an argument is passed by reference, ________.

Accepted Answer

A)   a copy of the argument's value is passed to the called method
B)   changes to the argument do not affect the original variable's value in the caller
C)   the called method can access the argument's value in the caller directly and modify that data
D)   the original value is removed from memoryE) None of the above
F) B) and D)

Question 17

Which of the following statements is true?

Accepted Answer

A)   The catch block contains the code that might throw an exception.
B)   The try block contains the code that handles the exception if one occurs.
C)   You can have many catch blocks to handle different types of exceptions.
D)   When a try block terminates, any variables declared in the try block are preserved.E) None of the above
F) A) and B)

Question 18

An argument type followed by a(n)  in a method's parameter list indicates that the method receives a variable number of arguments of that particular type.

Accepted Answer

A)   square brackets ([]) 
B)   ellipsis (...) 
C)   varargs keyword
D)   All of the above are acceptable to indicate a variable number of arguments.E) All of the above
F) A) and B)

Question 19

Which flag in a format specifier indicates that values with fewer digits than the field width should begin with a leading 0?

Accepted Answer

A)   p.
B)   l.
C)   w.
D)   0.E) None of the above
F) B) and C)

Question 20

Which statement correctly passes the array items to method takeArray? Array items contains 10 elements.

Accepted Answer

A)   takeArray(items[]) .
B)   takeArray(items) .
C)   takeArray(items[9]) .
D)   Arrays cannot be passed to methods-each item must be sent to the method separately.E) All of the above
F) A) and B)

Exam 6: Arrays and Arraylists

Which statement correctly passes the array items to method takeArray? Array items contains 10 elements.

Correct Answer
verified

When an argument is passed by reference, ________.

Correct Answer
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In array items, which expression below accesses the value at row 3 and column 4?

Correct Answer
verified

Which of the following statements creates a multidimensional array with 3 rows, where the first row contains 1 element, the second row contains 4 elements and the final row contains 2 elements?

Correct Answer
verified

Which of the following statements is true?

Correct Answer
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Constant variables also are called .

Correct Answer
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Attempting to access an array element outside of the bounds of an array, causes a(n) .

Correct Answer
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What do the following statements do? Double[] array; Array = new double[14];

Correct Answer
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Class ________ represents a dynamically resizable array-like data structure.

Correct Answer
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Which of the following statements is false?

Correct Answer
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Correct Answer
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Which expression adds 1 to the element of array arrayName at index i?

Correct Answer
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An argument type followed by a(n) in a method's parameter list indicates that the method receives a variable number of arguments of that particular type.

Correct Answer
verified

Consider the array: S[0] = 7 S[1] = 0 S[2] = -12 S[3] = 9 S[4] = 10 S[5] = 3 S[6] = 6 The value of s[s[6] - s[5]] is:

Correct Answer
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Invalid possibilities for array indices include .

Correct Answer
verified

Which flag in a format specifier indicates that values with fewer digits than the field width should begin with a leading 0?

Correct Answer
verified

Exception handling helps you create ________ programs.

Correct Answer
verified

Which of the following will not produce a compiler error?

Correct Answer
verified

Which method sets the background color of a JPanel?

Correct Answer
verified

A programmer must do the following before using an array:

Correct Answer
verified

Exam 6: Arrays and Arraylists

Which statement correctly passes the array items to method takeArray? Array items contains 10 elements.

Correct AnswerverifiedShow Answer

When an argument is passed by reference, ________.

Correct AnswerverifiedShow Answer

In array items, which expression below accesses the value at row 3 and column 4?

Correct AnswerverifiedShow Answer

Which of the following statements creates a multidimensional array with 3 rows, where the first row contains 1 element, the second row contains 4 elements and the final row contains 2 elements?

Correct AnswerverifiedShow Answer

Which of the following statements is true?

Correct AnswerverifiedShow Answer

Constant variables also are called .

Correct AnswerverifiedShow Answer

Attempting to access an array element outside of the bounds of an array, causes a(n) .

Correct AnswerverifiedShow Answer

What do the following statements do? Double[] array; Array = new double[14];

Correct AnswerverifiedShow Answer

Class ________ represents a dynamically resizable array-like data structure.

Correct AnswerverifiedShow Answer

Which of the following statements is false?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which expression adds 1 to the element of array arrayName at index i?

Correct AnswerverifiedShow Answer

An argument type followed by a(n) in a method's parameter list indicates that the method receives a variable number of arguments of that particular type.

Correct AnswerverifiedShow Answer

Consider the array: S[0] = 7 S[1] = 0 S[2] = -12 S[3] = 9 S[4] = 10 S[5] = 3 S[6] = 6 The value of s[s[6] - s[5]] is:

Correct AnswerverifiedShow Answer

Invalid possibilities for array indices include .

Correct AnswerverifiedShow Answer

Which flag in a format specifier indicates that values with fewer digits than the field width should begin with a leading 0?

Correct AnswerverifiedShow Answer

Exception handling helps you create ________ programs.

Correct AnswerverifiedShow Answer

Which of the following will not produce a compiler error?

Correct AnswerverifiedShow Answer

Which method sets the background color of a JPanel?

Correct AnswerverifiedShow Answer

A programmer must do the following before using an array:

Correct AnswerverifiedShow Answer

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