Question 1

Given the following, which of the statements below is not true? str.insert(8, 32);

Accepted Answer

A)  str is a StringBuilder type object. 
B)  The insert will start at position 32. 
C)  The starting position for the insert is 8. 
D)  The literal number 32 will be inserted.

Question 2

What is the value of str after the following code has been executed? 
 String str;
String sourceStr = "Hey diddle, diddle, the cat
And the fiddle";
Str = sourceStr.substring(12,17);

Accepted Answer

A)  diddle 
B)  diddl 
C)  didd 
D)  iddle

Question 3

What are the tokens in the following statement? StringTokenizer st = new StringTokenizer("9-14-2018", "-", true);

Accepted Answer

A)  9, 14, 2018 
B)  9, 14, 2018, - 
C)  - 
D)  None of these

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

If a non-letter is passed to the toLowerCase or toUpperCase method, it is returned unchanged.

Accepted Answer

A) True 
 B)False

Question 6

The __________ method of the String class can be used to tokenize a string.

Accepted Answer

A)  split 
B)  tokenize 
C)  trim 
D)  length

Question 7

The ________ character appears at the end (the right side) of a string, after the non-space characters.

Accepted Answer

A)  leading whitespace 
B)  character return 
C)  trailing whitespace 
D)  line feed

Question 8

StringBuilder objects are not immutable.

Accepted Answer

A) True 
 B)False

Question 9

The no-arg constructor for a StringBuilder object gives the object enough storage space to hold __________ characters.

Accepted Answer

A)  0 
B)  8 
C)  16 
D)  32

Question 10

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

Accepted Answer

A)  strand 
B)  substring 
C)  character fragment 
D)  nested string

Question 11

The StringBuilder class's insert method allows you to insert a(n) __________ into the calling object's string.

Accepted Answer

A)  char array 
B)  primitive type 
C)  String object 
D)  All of these

Question 12

Each of the numeric wrapper classes has a static ________ method that converts a number to a string.

Accepted Answer

A)  GetString 
B)  Parse 
C)  ToString 
D)  Convert

Question 13

In the following code, how many times will the for loop execute? 
String str = ("Ben and Jerry's ice cream is great.");
String[ ] tokens = str.split(" ");
For (String s : tokens)
System.out.println(s);

Accepted Answer

A)  1 
B)  3 
C)  5 
D)  7

Question 14

What would be the results of executing the following code? 
StringBuilder str = new StringBuilder("Little Jack
Horner ");
Str)append("sat on the ");
Str)append("corner");

Accepted Answer

A)  The program would crash. 
B)  str would reference "Little Jack Horner ". 
C)  str would reference "Little Jac Horner sat on the ". 
D)  str would reference "Little Jack Horner sat on the corner".

Question 15

The following statement correctly creates a StringBuilder object.
StringBuilder str = "Tuna sandwich";

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

The String class's valueOf method accepts a string representation as an argument and returns its equivalent integer value.

Accepted Answer

A) True 
 B)False

Question 18

What are the tokens in the following code? String str = "123-456-7890";
String[ ] tokens = str.split("-");

Accepted Answer

A)  123, 456,7890 
B)  123, 456, 7890,- 
C)  - 
D)  None of these

Question 19

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 20

The process of converting a wrapper class object to a primitive type is known as __________.

Accepted Answer

A)  simplifying 
B)  unboxing 
C)  parsing 
D)  devaluating

Exam 9: Text Processing and More About Wrapper Classes

Given the following, which of the statements below is not true? str.insert(8, 32) ;

What is the value of str after the following code has been executed? String str; String sourceStr = "Hey diddle, diddle, the cat And the fiddle"; Str = sourceStr.substring(12,17) ;

What are the tokens in the following statement? StringTokenizer st = new StringTokenizer("9-14-2018", "-", true) ;

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

If a non-letter is passed to the toLowerCase or toUpperCase method, it is returned unchanged.

The __________ method of the String class can be used to tokenize a string.

The ________ character appears at the end (the right side) of a string, after the non-space characters.

StringBuilder objects are not immutable.

The no-arg constructor for a StringBuilder object gives the object enough storage space to hold __________ characters.

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

The StringBuilder class's insert method allows you to insert a(n) __________ into the calling object's string.

Each of the numeric wrapper classes has a static ________ method that converts a number to a string.

In the following code, how many times will the for loop execute? String str = ("Ben and Jerry's ice cream is great.") ; String[ ] tokens = str.split(" ") ; For (String s : tokens) System.out.println(s) ;

What would be the results of executing the following code? StringBuilder str = new StringBuilder("Little Jack Horner ") ; Str) append("sat on the ") ; Str) append("corner") ;

The following statement correctly creates a StringBuilder object. StringBuilder str = "Tuna sandwich";

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

The String class's valueOf method accepts a string representation as an argument and returns its equivalent integer value.

What are the tokens in the following code? String str = "123-456-7890"; String[ ] tokens = str.split("-") ;

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

The process of converting a wrapper class object to a primitive type is known as __________.