Question 1

An exception object's ________ method returns the exception's error message.

Accepted Answer

A) String 
B) Message 
C) Error 
D) toString 
A) String 
B) Message 
C) Error 
D) toString D

Question 2

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

Question 3

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

Question 4

Consider the code segment below.Which of the following statements is false?
Int[] g;
G = new int[23];

Accepted Answer

A) The value of g[3] is -1. 
B) The first statement declares an array reference. 
C) The second statement creates the array. 
D) g is a reference to an array of integers. 
A) The value of g[3] is -1. 
B) The first statement declares an array reference. 
C) The second statement creates the array. 
D) g is a reference to an array of integers.

Question 5

Which statement below initializes array items to contain 3 rows and 2 columns?

Accepted Answer

A) int[][] items = {{2,4},{6,8},{10,12}}; 
B) int[][] items = {{2,6,10},{4,8,12}}; 
C) int[][] items = {2,4},{6,8},{10,12}; 
D) int[][] items = {2,6,10},{4,8,12}; 
A) int[][] items = {{2,4},{6,8},{10,12}}; 
B) int[][] items = {{2,6,10},{4,8,12}}; 
C) int[][] items = {2,4},{6,8},{10,12}; 
D) int[][] items = {2,6,10},{4,8,12};

Question 6

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. 
A) ArrayOutOfBoundsException. 
B) ArrayElementOutOfBoundsException. 
C) ArrayIndexOutOfBoundsException. 
D) ArrayException.

Question 7

Which of the following statements about creating arrays and initializing their elements is false?

Accepted Answer

A) The new keyword should be used to create an array. 
B) When an array is created with operator new,the number of elements must be placed in square brackets following the type of element being stored. 
C) The elements of an array of integers have a value of null before they are initialized. 
D) A for loop is commonly used to set the values of the elements of an array. 
A) The new keyword should be used to create an array. 
B) When an array is created with operator new,the number of elements must be placed in square brackets following the type of element being stored. 
C) The elements of an array of integers have a value of null before they are initialized. 
D) A for loop is commonly used to set the values of the elements of an array.

Question 8

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. 
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.

Question 9

Which of the following tasks cannot be performed using an enhanced for loop?

Accepted Answer

A) Calculating the product of all the values in an array. 
B) Displaying all even element values in an array. 
C) Comparing the elements in an array to a specific value. 
D) Incrementing the value stored in each element of the array. 
A) Calculating the product of all the values in an array. 
B) Displaying all even element values in an array. 
C) Comparing the elements in an array to a specific value. 
D) Incrementing the value stored in each element of the array.

Question 10

Exception handling helps you create ________ programs.

Accepted Answer

A) high-performance 
B) logic-error-free 
C) fault-tolerant 
D) compilation-error-free 
A) high-performance 
B) logic-error-free 
C) fault-tolerant 
D) compilation-error-free

Question 11

Consider integer array values,which contains 5 elements.Which statements successfully swap the contents of the array at index 3 and index 4?

Accepted Answer

A) 
Values[3] = values[4];
Values[4] = values[3]; 
B) 
Values[4] = values[3];
Values[3] = values[4]; 
C) 
Int temp = values[3];
Values[3] = values[4];
Values[4] = temp; 
D) 
Int temp = values[3];
Values[3] = values[4];
Values[4] = values[3]; 
A) 
Values[3] = values[4];
Values[4] = values[3]; 
B) 
Values[4] = values[3];
Values[3] = values[4]; 
C) 
Int temp = values[3];
Values[3] = values[4];
Values[4] = temp; 
D) 
Int temp = values[3];
Values[3] = values[4];
Values[4] = values[3];

Question 12

Which set of statements totals the values in two-dimensional int array items?

Accepted Answer

A) 
Int total = 0;
For (int subItems : items)
For (int item : subItems)
Total += item; 
B) 
Int total = 0;
For (int item: int[] subItems : items)
Total += item; 
C) 
Int total = 0;
For (int[] subItems : items)
For (int item : items)
Total += item; 
D) 
Int total = 0;
For (int[] subItems : items)
For (int item : subItems)
Total += item; 
A) 
Int total = 0;
For (int subItems : items)
For (int item : subItems)
Total += item; 
B) 
Int total = 0;
For (int item: int[] subItems : items)
Total += item; 
C) 
Int total = 0;
For (int[] subItems : items)
For (int item : items)
Total += item; 
D) 
Int total = 0;
For (int[] subItems : items)
For (int item : subItems)
Total += item;

Question 13

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

Accepted Answer

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

Question 14

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 
A) 0. 
B) 3. 
C) 9. 
D) 0

Question 15

A(n)________ indicates a problem that occurs while a program executes.

Accepted Answer

A) syntax error 
B) omitted import 
C) missing semicolon 
D) exception 
A) syntax error 
B) omitted import 
C) missing semicolon 
D) exception

Question 16

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. 
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.

Question 17

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. 
A) p. 
B) l. 
C) w. 
D) 0.

Question 18

Which of the following statements about an arc is false?

Accepted Answer

A) An arc is a section of an oval. 
B) The sweep is the amount of arc to cover. 
C) Method drawArc draws the edges of an arc. 
D) The fillArc method draws an oval,with the section that is an arc filled in. 
A) An arc is a section of an oval. 
B) The sweep is the amount of arc to cover. 
C) Method drawArc draws the edges of an arc. 
D) The fillArc method draws an oval,with the section that is an arc filled in.

Question 19

Class Arrays provides method __________ for comparing arrays to determine whether they have the same contents.

Accepted Answer

A) compare 
B) compares 
C) equal 
D) equals 
A) compare 
B) compares 
C) equal 
D) equals

Question 20

When you pass an array or an individual array element of a reference type to a method,the called method receives ________.When you pass an individual element of a primitive type,the called method receives ________.

Accepted Answer

A) a copy of the element's reference,a copy of the element's reference 
B) a copy of the element's value,a copy of the element's reference 
C) a copy of the element's value,a copy of the element's value 
D) a copy of the element's reference,a copy of the element's value 
A) a copy of the element's reference,a copy of the element's reference 
B) a copy of the element's value,a copy of the element's reference 
C) a copy of the element's value,a copy of the element's value 
D) a copy of the element's reference,a copy of the element's value

Exam 7: Arrays and Arraylists

An exception object's ________ method returns the exception's error message.

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.

A programmer must do the following before using an array:

Consider the code segment below.Which of the following statements is false? Int[] g; G = new int[23];

Which statement below initializes array items to contain 3 rows and 2 columns?

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

Which of the following statements about creating arrays and initializing their elements is false?

Which of the following statements is false?

Which of the following tasks cannot be performed using an enhanced for loop?

Exception handling helps you create ________ programs.

Consider integer array values,which contains 5 elements.Which statements successfully swap the contents of the array at index 3 and index 4?

Which set of statements totals the values in two-dimensional int array items?

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

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:

A(n)________ indicates a problem that occurs while a program executes.

Which of the following will not produce a compiler error?

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

Which of the following statements about an arc is false?

Class Arrays provides method __________ for comparing arrays to determine whether they have the same contents.

When you pass an array or an individual array element of a reference type to a method,the called method receives ________.When you pass an individual element of a primitive type,the called method receives ________.

Introduction to Computers and Java

Introduction to Java Applications

Introduction to Classes and Objects

Control Statements: Part 1

Control Statements: Part 2

Methods: a Deeper Look

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Gui Components: Part 1

Graphics and Java 2D

Strings

Files,streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

JavaFX

Filters

When you pass an array or an individual array element of a reference type to a method,the called method receives .When you pass an individual element of a primitive type,the called method receives .