Question 1

The __________ class is the wrapper class for the char data type.

Accepted Answer

A)  StringBuilder 
B)  Integer 
C)  Character 
D)  String 
A)  StringBuilder 
B)  Integer 
C)  Character 
D)  String C

Question 2

If a string has more than one character used as a delimiter, you must write a loop to determine the tokens, one for each delimiter character.

Accepted Answer

A) True 
 B)False  False

Question 3

What will be the value of position after the following code is executed?
 int position;
String str = "The cow jumped over the moon.";
Position = str.lastIndexOf("ov", 14);

Accepted Answer

A)  14 
B)  1 
C)  0 
D)  -1 
A)  14 
B)  1 
C)  0 
D)  -1 D

Question 4

In the following code, how many times will the for loop execute? 
String str = "1,2,3,4,5,6,7,8,9");
String[ ] tokens = str.split(",");
For (String s : tokens)
System.out.println(s);

Accepted Answer

A)  1 
B)  5 
C)  7 
D)  9 
A)  1 
B)  5 
C)  7 
D)  9

Question 5

What will be displayed after the following code is executed? boolean matches;
String str1 = "The cow jumped over the moon.";
String str2 = "moon";
Matches = str1.endsWith(str1);
System.out.println(matches);

Accepted Answer

A)  true 
B)  moon 
C)  false 
D)  The cow 
A)  true 
B)  moon 
C)  false 
D)  The cow

Question 6

Most of the String comparison methods are case sensitive.

Accepted Answer

A) True 
 B)False

Question 7

What will be displayed after the following code is executed? String str = "RSTUVWXYZ";
System.out.println(str.charAt(5));

Accepted Answer

A)  W 
B)  X 
C)  V 
D)  U 
A)  W 
B)  X 
C)  V 
D)  U

Question 8

What will be displayed after the following code is executed? StringBuilder strb = new StringBuilder(12);
Strb.append("The cow ");
Strb.append("jumped over the ");
Strb.append("moon.");
System.out.println(strb);

Accepted Answer

A)  The cow
Jumped over the
Moon. 
B)  The cow jumped over the moon. 
C)  The cow jump 
D)  12The cow jumped over the moon. 
A)  The cow
Jumped over the
Moon. 
B)  The cow jumped over the moon. 
C)  The cow jump 
D)  12The cow jumped over the moon.

Question 9

Autoboxing is __________.

Accepted Answer

A)  Java's process of automatically "boxing up" a value inside an object 
B)  the automatic allocation of array elements 
C)  the process of assigning a default value to primitive data types 
D)  the process of identifying tokens in a string 
A)  Java's process of automatically "boxing up" a value inside an object 
B)  the automatic allocation of array elements 
C)  the process of assigning a default value to primitive data types 
D)  the process of identifying tokens in a string

Question 10

Any ___________ argument passed to the Character class's toLowerCase method or toUpperCase method is returned as it is.

Accepted Answer

A)  nonletter 
B)  char 
C)  string 
D)  static 
A)  nonletter 
B)  char 
C)  string 
D)  static

Question 11

What will be displayed after the following statements are executed? String str = "red$green&blue#orange";
String[ ] tokens = str.split("[$&#]");
For (String s : tokens)
System.out.print(s + " ");

Accepted Answer

A)  red green blue orange 
B)  red $ green & blue # orange 
C)  $ & # 
D)  red[$&#]green[$&#]blue[$&#]orange 
A)  red green blue orange 
B)  red $ green & blue # orange 
C)  $ & # 
D)  red[$&#]green[$&#]blue[$&#]orange

Question 12

If you are using characters other than whitespaces as delimiters, you will probably want to trim the string before tokenizing; otherwise, the leading and/or following whitespaces will become part of the first and/or last token.

Accepted Answer

A) True 
 B)False

Question 13

The wrapper classes in Java are immutable, which means that once you create an object, you cannot change the object's value.

Accepted Answer

A) True 
 B)False

Question 14

What will be printed after the following code is executed? 
String str = "abc456";
Int m = 0;
While ( m < 6 )
{
If (Character.isLetter(str.charAt(m)))
System.out.print(
Character.toUpperCase(str.charAt(m)));
M++;
}

Accepted Answer

A)  abc456 
B)  ABC456 
C)  ABC 
D)  456 
A)  abc456 
B)  ABC456 
C)  ABC 
D)  456

Question 15

What will be the value of matches after the following code is executed? boolean matches;
String[ ] productCodes = {"456HI345", "3456hj"};
Matches = productCodes[0].regionMatches(true, 1,
ProductCodes[1], 2, 3);

Accepted Answer

A)  56H 
B)  56h 
C)  true 
D)  false 
A)  56H 
B)  56h 
C)  true 
D)  false

Question 16

You can change the contents of a StringBuilder object, but you cannot change the contents of a String object.

Accepted Answer

A) True 
 B)False

Question 17

When working with the String and StringBuilder classes' getChars method, the character at the start position is included in the substring but the character at the end position is not included.

Accepted Answer

A) True 
 B)False

Question 18

If a non-letter argument is passed to the toLowerCase or toUpperCase method, the boolean value false is returned.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following import statements is required to use the Character wrapper class?

Accepted Answer

A)  import java.String; 
B)  import java.lang.Char; 
C)  import java.Char; 
D)  No import statement is required 
A)  import java.String; 
B)  import java.lang.Char; 
C)  import java.Char; 
D)  No import statement is required

Question 20

Which of the following statements will convert the string, str = "285.74" to a double?

Accepted Answer

A)  double x = str; 
B)  double x = Double.parseDouble(str); 
C)  double x = Double.Double(str); 
D)  double x = str.Double.parseDouble; 
A)  double x = str; 
B)  double x = Double.parseDouble(str); 
C)  double x = Double.Double(str); 
D)  double x = str.Double.parseDouble;

The __________ class is the wrapper class for the char data type.

If a string has more than one character used as a delimiter, you must write a loop to determine the tokens, one for each delimiter character.

What will be the value of position after the following code is executed? int position; String str = "The cow jumped over the moon."; Position = str.lastIndexOf("ov", 14);

In the following code, how many times will the for loop execute? String str = "1,2,3,4,5,6,7,8,9"); String[ ] tokens = str.split(","); For (String s : tokens) System.out.println(s);

What will be displayed after the following code is executed? boolean matches; String str1 = "The cow jumped over the moon."; String str2 = "moon"; Matches = str1.endsWith(str1); System.out.println(matches);

Most of the String comparison methods are case sensitive.

What will be displayed after the following code is executed? String str = "RSTUVWXYZ"; System.out.println(str.charAt(5));

What will be displayed after the following code is executed? StringBuilder strb = new StringBuilder(12); Strb.append("The cow "); Strb.append("jumped over the "); Strb.append("moon."); System.out.println(strb);

Autoboxing is __________.

Any ___________ argument passed to the Character class's toLowerCase method or toUpperCase method is returned as it is.

What will be displayed after the following statements are executed? String str = "red$green&blue#orange"; String[ ] tokens = str.split("[$&#]"); For (String s : tokens) System.out.print(s + " ");

If you are using characters other than whitespaces as delimiters, you will probably want to trim the string before tokenizing; otherwise, the leading and/or following whitespaces will become part of the first and/or last token.

The wrapper classes in Java are immutable, which means that once you create an object, you cannot change the object's value.

What will be printed after the following code is executed? String str = "abc456"; Int m = 0; While ( m < 6 ) { If (Character.isLetter(str.charAt(m))) System.out.print( Character.toUpperCase(str.charAt(m))); M++; }

What will be the value of matches after the following code is executed? boolean matches; String[ ] productCodes = {"456HI345", "3456hj"}; Matches = productCodes[0].regionMatches(true, 1, ProductCodes[1], 2, 3);

You can change the contents of a StringBuilder object, but you cannot change the contents of a String object.

When working with the String and StringBuilder classes' getChars method, the character at the start position is included in the substring but the character at the end position is not included.

If a non-letter argument is passed to the toLowerCase or toUpperCase method, the boolean value false is returned.

Which of the following import statements is required to use the Character wrapper class?

Which of the following statements will convert the string, str = "285.74" to a double?

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Inheritance

Exceptions and Advanced File Io

Java-Fx: Gui Programming and Basic Controls

Java-Fx: Advanced Controls

Java-Fx: Graphics, Effects, and Media

Recursion

Databases

Filters

Exam 9: Text Processing and More About Wrapper Classes

The __________ class is the wrapper class for the char data type.

If a string has more than one character used as a delimiter, you must write a loop to determine the tokens, one for each delimiter character.

What will be the value of position after the following code is executed? int position; String str = "The cow jumped over the moon."; Position = str.lastIndexOf("ov", 14);

In the following code, how many times will the for loop execute? String str = "1,2,3,4,5,6,7,8,9"); String[ ] tokens = str.split(","); For (String s : tokens) System.out.println(s);

What will be displayed after the following code is executed? boolean matches; String str1 = "The cow jumped over the moon."; String str2 = "moon"; Matches = str1.endsWith(str1); System.out.println(matches);

Most of the String comparison methods are case sensitive.

What will be displayed after the following code is executed? String str = "RSTUVWXYZ"; System.out.println(str.charAt(5));

What will be displayed after the following code is executed? StringBuilder strb = new StringBuilder(12); Strb.append("The cow "); Strb.append("jumped over the "); Strb.append("moon."); System.out.println(strb);

Autoboxing is __________.

Any ___________ argument passed to the Character class's toLowerCase method or toUpperCase method is returned as it is.

What will be displayed after the following statements are executed? String str = "red$green&blue#orange"; String[ ] tokens = str.split("[$&#]"); For (String s : tokens) System.out.print(s + " ");

If you are using characters other than whitespaces as delimiters, you will probably want to trim the string before tokenizing; otherwise, the leading and/or following whitespaces will become part of the first and/or last token.

The wrapper classes in Java are immutable, which means that once you create an object, you cannot change the object's value.

What will be printed after the following code is executed? String str = "abc456"; Int m = 0; While ( m < 6 ) { If (Character.isLetter(str.charAt(m))) System.out.print( Character.toUpperCase(str.charAt(m))); M++; }

What will be the value of matches after the following code is executed? boolean matches; String[ ] productCodes = {"456HI345", "3456hj"}; Matches = productCodes[0].regionMatches(true, 1, ProductCodes[1], 2, 3);

You can change the contents of a StringBuilder object, but you cannot change the contents of a String object.

When working with the String and StringBuilder classes' getChars method, the character at the start position is included in the substring but the character at the end position is not included.

If a non-letter argument is passed to the toLowerCase or toUpperCase method, the boolean value false is returned.

Which of the following import statements is required to use the Character wrapper class?

Which of the following statements will convert the string, str = "285.74" to a double?

Introduction to Computers and Java

Java Fundamentals

Decision Structures

Loops and Files

Methods

A First Look at Classes

Arrays and the Arraylist Class

A Second Look at Classes and Objects

Inheritance

Exceptions and Advanced File Io

Java-Fx: Gui Programming and Basic Controls

Java-Fx: Advanced Controls

Java-Fx: Graphics, Effects, and Media

Recursion

Databases

Filters