Section 1
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T/F: The parameter type in the following method is double. public static double getAmount(int ID) {...}
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Cards (73)
Section 1
(50 cards)
T/F: The parameter type in the following method is double. public static double getAmount(int ID) {...}
False
True/False: You use the File class to obtain information about a file, such as whether it exists or is open, its size, and its last modification date.
True
What is the output of the following code segment? int a = 45; do { System.out.println("a++ = " + a++); } while (a > 100);
a++=45
Which one of the following modifiers has the lowest level of security?
public
A method body is included within _____.
curly braces
What is the output of the following code segment? int n = 5; int i; for (i=0; i < 10; i++); n += i; System.out.println("n = " + n);
n=15
T/F: A programmer can declare methods outside a Java class.
False
An example of a primitive data type is _____.
char
T/F: The body of a while loop is executed at least once.
false
True/False: When you create a segment of code in which something might go wrong, you place the code in a try block.
True
The result of the following expression is _____. 6 + 2 * 3 - 4
8
To exit a program successfully, you use _____.
System.exit(0);
True/False: Computer users use the term file to describe the objects that they store on permanent storage devices.
True
True/False: When a Thread is in the ready state, isAlive() returns true.
False
Any ArithmeticException generated within the try block in the program would be caught by the _______.
catch block
The read() method in the following statement reads a(n) _____. System.in.read();
byte
What is the value of x after the following statements are executed? int x = 0; int y = 10; x = ++y;
11
True/False: Multithreaded programs often run slower.
True
Which of the following is not an element of the try block?
a catch
To create standard dialog boxes, you use _____.
JOptionPane
True/False: When you run a Java program, the runnable Thread with the lowest priority runs first.
False
True/False: In Java, there is one basic class of errors: Exception.
False
When a Thread completes the execution of its run() method, its state is _____.
Inactive
You can use the ----------( ) method that ArithmeticException inherits from the Throwable class. To retrieve Java's message about any Throwable Exception named someException, you code someException.getMessage().
getMessage
True/False: An exception is an unexpected or error condition.
True
Which of the following comprises less serious errors that represent unusual conditions that arise while a program is running, and from which the program can recover?
Exception Class
True/False: When you have actions you must perform at the end of a try... catch sequence, you can use a catch block.
False
When you have actions you must perform at the end of a try...catch sequence, you can use a ------ block. The code within a ------ block executes whether or not the preceding try block identifies Exceptions. Usually, you use a ------ block to perform clean-up tasks that must happen whether or not any Exceptions occurred, and whether or not any Exceptions that occurred were caught.
finally
T/F: Encapsulation means putting data and related methods in a self-contained class.
True
What is the value of x after the following statements are executed? int x = 0; int y = 10; x = y++;
10
When you create a thread, which state would it be in?
New
True/False: If you do not assign a priority to a Thread object it assumes a default priority of 5.
True
True/False: You can place as many place as many statements as you need within a try block; only the last error-generating statement throws an exception.
False
The Error class represents errors which your program usually _____.
cannot recover from
T/F: To store a value explicitly as a float, you can type the letter F after the number.
True
The File class is a direct descendant of the _____.
Object class
True/False: InputStream and OutputStream are abstract classes that contain methods for performing input and output.
True
When you write a method that might throw an Exception, you can type the clause ------ after the method header to indicate the type of Exception that might be thrown.
throws <name>Exception
The input dialog box returns a(n) _____.
String
A ----- block is a segment of code that can handle an Exception that might be thrown by the try block that precedes it. Each ----- block can "-----" one type of Exception. A ----- block looks a lot like a -----( ) method that takes an argument that is some type of Exception. However, it is not a method; it has no return type, and you can't call it directly.
catch
An exception is an ----- that occurs during the execution of a program that ----- the normal flow of instructions.
event, disrupts
Each catch block can "catch" how many types of Exceptions?
one type
T/F: The following loop has a(n) infinite body.while(loopCount > 20);
false
T/F: A method can also return nothing, in which case the return type is null.
False
The value of compare1 after the following statements are executed is _____. int x = 249; int y = 250; boolean compare1 = (x++ = = y);
false
True/False: You must include the statement java.import in any program that uses the file class.
False
If a method throws an Exception that will be caught, you must also use the keyword throws, followed by a(n) _____ in the method header.
Exception Type
The situation when two Threads are waiting for each other to do something before either can progress is called _____.
deadlock
If you are writing applet classes and you need to use threads, you would _____.
implement the runnable interface
Where is the Thread class defined?
java.lang
Section 2
(23 cards)