FINAL TES 2

1.   The java.io package has problems with missing operations, like copy, move, and such.
True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  2.   Prior to Java 7, you write to a file with a call to the BufferedWriter class's write() method. True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  3.   The way that you read from a file has changed since the introduction of Java 7.  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  4.   Which of the following is an absolute Windows path?  Mark for Review
(1) Points
 
 
data

 
/

 
\Users\UserName\data

 
C:\Users\UserName\data (*)

 
/home/user/username

 
  Correct

 
  5.   Java 7 requires you create an instance of java.io.File class. True or false?  Mark for Review
(1) Points
 
 
True

 
False (*)

 
  Correct

6.   What two packages are available in Java to allow you to transfer data?  Mark for Review
(1) Points
 
  (Choose all correct answers)
 
 
java.input.package

 
java.nio.file package (*)

 
java.io package (*)

 
java.output.package

 
  Correct

 
  7.   The java.nio.file package has improved exception handling.
True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  8.   The normalize() method removes extraneous elements from a qualified path. True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  9.   Using the FOR loop method of incrementing through a String is beneficial if you desire to: (Choose all that apply)  Mark for Review
(1) Points
 
  (Choose all correct answers)
 
 
Parse the String. (*)

 
Search for a specific character or String inside of the String. (*)

 
You don't use a FOR loop with Strings

 
Read the String backwards (from last element to first element). (*)

 
  Correct

 
  10.   Split is a method for Strings that parses a string by a specified character, or, if unspecified, by spaces, and returns the parsed elements in an array of Strings.
True or false?  Mark for Review
(1) Points
 
 
True

 
False (*)

 
  Correct

11.   What class is the split() method a member of?  Mark for Review
(1) Points
 
 
String (*)

 
Array

 
StringBuilder

 
Parse

 
  Correct

 
  12.   Which of the following correctly defines a StringBuilder?  Mark for Review
(1) Points
 
 
There is no such thing as a StringBuilder in Java.

 
A method that adds characters to a string.

 
A class inside the java.util.regex package.

 
A class that represents a string-like object. (*)

 
  Correct

 
  13.   Identify the method, of those listed below, that is not available to both StringBuilders and Strings?  Mark for Review
(1) Points
 
 
delete(int start, int end) (*)

 
length()

 
charAt(int index)

 
indexOf(String str)

 
  Correct

 
  14.   Which of the following are true about parsing a String?  Mark for Review
(1) Points
 
  (Choose all correct answers)
 
 
It is possible to use the String.split() method to parse a string. (*)

 
It is possible to use a for loop to parse a string. (*)

 
It is a way of dividing a string into a set of sub-strings. (*)

 
It is not possible to parse a string using regular expressions.

 
  Correct

 
  15.   Which of the following correctly initializes a StringBuilder?  Mark for Review
(1) Points
 
 
StringBuilder sb = "This is my String Builder";

 
StringBuilder sb = StringBuilder(500);

 
StringBuilder sb = new StringBuilder(); (*)

 
None of the above.

 
  Correct

16.   Which of the following methods can be used to replace a segment in a string with a new string?  Mark for Review
(1) Points
 
 
remove(String oldString, String newString)

 
replaceAll(String oldString, String newString) (*)

 
replaceAll(String newString)

 
substring(int start, int end, String newString)

 
None of the above. There is no replaceAll(String newString) method with one argument.

 
  Correct

 
  17.   A non-linear recursive method is less expensive than a linear recursive method. True or false?  Mark for Review
(1) Points
 
 
True

 
False (*)

 
  Correct

 
  18.   A linear recursion requires the method to call which direction?  Mark for Review
(1) Points
 
 
Forward

 
Backward (*)

 
Both forward and backward

 
None of the above

 
  Correct

 
  19.   A non-linear recursive method calls how many copies of itself in the recursive case?  Mark for Review
(1) Points
 
 
0

 
1

 
2 or more (*)

 
  Correct

 
  20.   A linear recursive method can call how many copies of itself?  Mark for Review
(1) Points
 
 
1 (*)

 
2 or more

 
None

 
  Correct

21.   Forward thinking helps when creating linear recursive methods. True or false?  Mark for Review
(1) Points
 
 
True

 
False (*)

 
  Correct

 
  22.   Which of the following correctly defines Pattern?  Mark for Review
(1) Points
 
 
A method of dividing a string into a set of sub-strings.

 
A class in the java.util.regex package that stores the format of a regular expression. (*)

 
A regular expression symbol that represents any character.

 
A class in the java.util.regex package that stores matches.

 
  Correct

 
  23.   Which of the following correctly defines a repetition operator?  Mark for Review
(1) Points
 
 
A symbol that represents any character in regular expressions.

 
A method that returns the number of occurrences of the specified character.

 
Any symbol in regular expressions that indicates the number of occurrences a specified character appears in a matching string. (*)

 
None of the above.

 
  Correct

 
  24.   Square brackets are a representation for any character in regular expressions "[ ]".
True or false?  Mark for Review
(1) Points
 
 
True

 
False (*)

 
  Correct

 
  25.   What is the correct explanation of when this code will return true?

return str.matches(".*[0-9]{6}.*");  Mark for Review
(1) Points
 
 
Any time that str contains two dots.

 
Any time that str contains a sequence of 6 digits. (*)

 
Any time that str has between zero and nine characters followed by a 6.

 
Any time str contains a 6.

 
Always.

 
  Correct

26.   Which of the following methods for the String class take a regular expression as a parameter and returns true if the string matches the expression?  Mark for Review
(1) Points
 
 
matches(String regex) (*)

 
compareTo(String regex)

 
equalsIgnoreCase(String regex)

 
equals(String regex)

 
  Correct

 
  27.   The following code correctly initializes a pattern with the regular expression "[0-9]{2}/[0-9]{2}/[0-9]{2}".

Pattern dateP = Pattern.compile("[0-9]{2}/[0-9]{2}/[0-9]{2}");

True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  28.   Which of the following does not correctly match the regular expression symbol to its proper function?  Mark for Review
(1) Points
 
 
"{x}" means there must be x occurrences of the preceding character in the string to be a match.

 
"?" means there may be zero or one occurrences of the preceding character in the string to be a match.

 
"+" means there may be zero or more occurrences of the preceding character in the string to be a match. (*)

 
"{x,}" means there may be x or more occurrences of the preceeding character in the string to be a match.

 
"{x,y}" means there may be between x and y occurrences of the preceding character in the string to be a match.

 
  Correct

 
  29.   In a regular expression, {x} and {x,} represent the same thing, that the preceding character may occur x or more times to create a match.
True or false?  Mark for Review
(1) Points
 
 
True

 
False (*)

 
  Correct

 
  30.   Assertions are optional ways to catch logic errors in code.
True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

31.   What is exception handling?  Mark for Review
(1) Points
 
 
An error that occurs against the flow of your program.

 
When a file fails to open.

 
If your program exits before you expect it to.

 
A consistent way of handling various errors. (*)

 
  Correct

 
  32.   Methods can not throw exceptions.
True or false?  Mark for Review
(1) Points
 
 
True

 
False (*)

 
  Correct

 
  33.   When will a finally statement be executed?  Mark for Review
(1) Points
 
 
Only if an exception is not thrown.

 
Only if an exception is thrown.

 
Always; no matter if an exception is thrown or not. (*)

 
Only if multiple exceptions are caught and thrown.

 
Never; it is there for visual purposes.

 
  Correct

 
  34.   The finally clause only executes when an exception is not caught and thrown.
True or false?  Mark for Review
(1) Points
 
 
True

 
False (*)

 
  Correct

 
  35.   Assertions are boolean statements to test and debug your programs.
True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

36.   What symbol is used to separate multiple exceptions in one catch statement?  Mark for Review
(1) Points
 
 
None, multiple exceptions can't be handled in one catch statement.

 
A single bar: | (*)

 
&&

 
(==) (equals equals)

 
  Correct

 
  37.   Multiple catch statements can be used for a single try statement.
True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  38.   The Files class provides a instance method that creates a new BufferedReader.
True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  39.   Which of the following static methods is not provided by the Files class to check file properties or duplication?  Mark for Review
(1) Points
 
 
Files.isWritable(Path p);

 
Files.isArchived(Path p); (*)

 
Files.isHidden(Path p);

 
Files.isReadable(Path p);

 
  Correct

 
  40.   The read() method lets you read a character at a time. True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

41.   The Paths class provides a static get() method to find a valid Path.
True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  42.   The System.err writes standard output to the console.
True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  43.   An ObjectInputStream lets you read a serialized object. True or false?  Mark for Review
(1) Points
 
 
True

 
False (*)

 
  Correct

 
  44.   A serialized class implements which interface?  Mark for Review
(1) Points
 
 
Serializer

 
Serializable (*)

 
Serializing

 
Serialized

 
SerializedObject

 
  Correct

 
  45.   The Files class lets you check for file properties. True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

46.   Which of the following is an attribute of a two tier architecture application?  Mark for Review
(1) Points
 
 
An application of that has a client and server only. (*)

 
A complex application that includes a client, a server and database.

 
An application of that runs on a single computer.

 
None of the above.

 
  Correct

 
  47.   Which of the following files are not required to be uploaded to a web server to deploy a java application/applet?  Mark for Review
(1) Points
 
 
jar files

 
JNLP files

 
html files

 
.java files (*)

 
None of the above

 
  Correct

 
  48.   Which of the following is an attribute of a three tier architecture application?  Mark for Review
(1) Points
 
 
an application of that has a client and server only

 
a complex application that includes a client, a server and database (*)

 
an application of that runs on a single computer

 
None of the above

 
  Correct

 
  49.   An example of two tier architecture would be a client application working with a server application.
True or false?  Mark for Review
(1) Points
 
 
True (*)

 
False

 
  Correct

 
  50.   How would you make an instance of Car in a class that did import the vehicle package below?
   Mark for Review
(1) Points
 
 
Car c = new Car(); (*)

 
vehicle.Car c=new Car();

 
vehicle.Car c=new vehicle.Car();

 
vehicle.Car c=new vehicle();

 
None of the above

 
  Correct