Question 1

A wrapper class is a class that is "wrapped around" a primitive data type and allows you to create objects instead of variables.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following statements will display the maximum value that a double can hold?

Accepted Answer

A)  System.out.println(Double.MAX_VALU
E) ; 
B)  System.out.println(Double.MAXIMUM_VALU
E) ; 
C)  System.out.println(Double.MAX_VAL); 
D)  System.out.println(<double>(MAX_VALU
E) );

Question 3

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

Accepted Answer

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

Question 4

The String class's __________ method accepts a value of any primitive data type as its argument and returns a string representation of the value.

Accepted Answer

A)  trim 
B)  getChar 
C)  toString 
D)  valueOf

Question 5

In the __________ file format, when data in a spreadsheet is exported, each row is written to a line and commas are used to separate the values in the cells.

Accepted Answer

A)  comma separated value 
B)  extensible markup language 
C)  excel binary 
D)  data interchange

Question 6

The Character wrapper class provides numerous methods for

Accepted Answer

A)  converting objects to primitive data types 
B)  testing and converting character data 
C)  testing and converting numeric literals 
D)  performing operations with named constants

Question 7

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

Question 8

Which of the following statements converts a String object variable named str to an int and stores the value in the variable x?

Accepted Answer

A)  int x = Integer.integer(str); 
B)  int x - str; 
C)  int x = Integer.parseInteger(str); 
D)  int x = Integer.parseInt(str);

Question 9

Trying to extract more tokens than exist from a StringTokenizer object will cause an error.

Accepted Answer

A) True 
 B)False

Question 10

Most of the String comparison methods are case sensitive.

Accepted Answer

A) True 
 B)False

Question 11

The term __________ is commonly used to refer to a string that is part of another string.

Accepted Answer

A)  nested string 
B)  literal 
C)  substring 
D)  delimiter

Question 12

The __________ method returns a copy of the calling String object with all leading and trailing whitespace characters deleted.

Accepted Answer

A)  remove 
B)  trim 
C)  compress 
D)  concat

Question 13

You can concatenate String objects by using the

Accepted Answer

A)  concat or trim methods 
B)  concat method or the + operator 
C)  concatenate or join methods 
D)  concatenate method or the + operator

Question 14

You may cause an off-by-one error when working with a character position within a string if you think of the first position in the string as 1.

Accepted Answer

A) True 
 B)False

Question 15

Given the following code, how many times will the while loop be executed? StringTokenizer st = new StringTokenizer("Java programming is fun!");
While (st.hasMoreTokens())
System.out.println(st.nextToken());

Accepted Answer

A)  7 
B)  4 
C)  5 
D)  1

Question 16

Which of the following statements converts a double variable named tax to a string and stores the value in the String object named str?

Accepted Answer

A)  String str = Double.toString(tax); 
B)  String str = double(tax); 
C)  String str = double.toString(tax); 
D)  String str = tax.Double.toString(str);

Question 17

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

Question 18

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

Question 19

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

Question 20

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.indexOf("ov");

Accepted Answer

A)  14 
B)  15 
C)  18 
D)  17

Exam 8: Text Processing and Wrapper Classes

A wrapper class is a class that is "wrapped around" a primitive data type and allows you to create objects instead of variables.

Which of the following statements will display the maximum value that a double can hold?

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

The String class's __________ method accepts a value of any primitive data type as its argument and returns a string representation of the value.

In the __________ file format, when data in a spreadsheet is exported, each row is written to a line and commas are used to separate the values in the cells.

The Character wrapper class provides numerous methods for

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) ;

Which of the following statements converts a String object variable named str to an int and stores the value in the variable x?

Trying to extract more tokens than exist from a StringTokenizer object will cause an error.

Most of the String comparison methods are case sensitive.

The term __________ is commonly used to refer to a string that is part of another string.

The __________ method returns a copy of the calling String object with all leading and trailing whitespace characters deleted.

You can concatenate String objects by using the

You may cause an off-by-one error when working with a character position within a string if you think of the first position in the string as 1.

Given the following code, how many times will the while loop be executed? StringTokenizer st = new StringTokenizer("Java programming is fun!") ; While (st.hasMoreTokens() ) System.out.println(st.nextToken() ) ;

Which of the following statements converts a double variable named tax to a string and stores the value in the String object named str?

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) ;

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

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.indexOf("ov") ;