Question 1

After a successful compile, you can run the class file on any computer that has a ____.

Accepted Answer

The Java language interpreter is required to run the compiled class file on any computer. The other options listed are not necessary for running a compiled Java program.

Question 2

You use an  import  statement when you want to access a built-in Java class that is contained in a group of classes called a(n) ____.

Accepted Answer

In Java, a group of related classes is called a package. To access classes from a package, you need to use an import statement. Therefore, choice C is the correct answer as it refers to the concept of a package in Java.

Question 3

A ____ is an error not detected until the program asks the computer to do something wrong, or even illegal, while executing.

Accepted Answer

A run-time error is an error that occurs while the program is executing, and is not detected until the program attempts to do something illegal, such as divide by zero or access an out-of-bounds array index. Syntax errors, on the other hand, are detected by the compiler before the program is executed. Packages and Java APIs are not related to the concept of errors.

Question 4

In programming, named computer memory locations are called ____because they hold values that might vary.

Accepted Answer

Named computer memory locations that hold values that might vary are called variables. Constants hold fixed values, strings are a type of data, and addresses refer to the location of a memory location rather than the content stored in it.

Question 5

Whenever a method requires multiple arguments, the arguments are always separated with ____.

Accepted Answer

In programming, multiple arguments in a method are separated by commas.

Question 6

In a ____ environment, you can change directories using the cd command. For example, to change to a directory named MyClasses , you type cd MyClasses and press Enter.

Accepted Answer

The cd command is used in a DOS environment to change directories. It is not used in Windows, Java, or graphical environments.

Question 7

public class First    {
     public static void main(String[] args)
     {
        System.out.println("First Java application");
     }
   }
Given the above code, which item identifies the method's return type?

Accepted Answer

The return type of the main method in this code is "void", which means it does not return anything. This is indicated by the "void" keyword before the method name. None of the other options identifies the method's return type - "public" is an access modifier, "static" is a keyword indicating that the method is a class method, and "println" is a method call within the main method, not the return type.

Question 8

____ is the process the compiler uses to divide your source code into meaningful portions; the message means that the compiler was in the process of analyzing the code when the end of the file was encountered prematurely.

Accepted Answer

Parsing is the process used by the compiler to analyze the source code and divide it into meaningful portions such as tokens, expressions, and statements. The error message indicates that the compiler encountered the end of the file before completing the parsing process.

Question 9

If you receive an error that states, "Exception in thread 'main' java.lang.NoClassDefFoundError," when you try to execute the application, you probably do not have your ____ set correctly.

Accepted Answer

The error message suggests that the application is unable to find the class definition at runtime. This is usually caused by an incorrect classpath setting. Therefore, the correct answer is B, which is the classpath.

Question 10

Java contains a class named ____ that allows you to produce dialog boxes.

Accepted Answer

The JOptionPane class in Java allows you to create and display dialog boxes for information, warnings, errors, inputs, and more. It provides many methods for customizing the appearance and behavior of the dialog boxes.

Question 11

public class First {
   public static void main(String[] args)
   {
      System.out.println("First Java application");
   }
}
Given the above code, which item identifies the name of the class?

Accepted Answer

In the given code, "First" is the name of the class as it is written after the keyword "class".

Question 12

public class First    {
     public static void main(String[] args)
     {
        System.out.println("First Java application");
     }
   }
Given the above code, which item identifies that the method will work without instantiating an object of the class?

Accepted Answer

The static keyword is what allows the method to be called without instantiating an object of the class.

Question 13

A(n) ____ error occurs when the syntax of the program is correct and the program compiles but produces incorrect results when you execute it.

Accepted Answer

A logic error occurs when the code is syntactically correct, but does not produce the intended or expected output due to flawed logic in the program's design. It can be difficult to spot and fix, as the code will run without errors or issues, but the results will be inaccurate or incorrect.

Question 14

____ comments are a special case of block comments that are used to generate documentation.

Accepted Answer

Javadoc comments are a special type of block comments used in Java to generate documentation. They start with /** and end with */, and are processed by the Javadoc tool to create HTML documentation.

Question 15

It is a tradition among programmers that the first program you write in any language produces "____" as its output.

Accepted Answer

The tradition is to print "Hello, world!" as the output of the first program in any language. This is a simple program that demonstrates basic syntax and outputs a familiar message to indicate that the program is working properly.

Question 16

{ public static void main(String[] args)
   {
      System.out.println("First Java application");
   }
}
Given the above code, which item identifies the access specifier?

Accepted Answer

The access specifier in this code is "public". It specifies that the main method can be accessed and called from outside the class.

Question 17

If a compiler detects a violation of language rules, it refuses to translate the class to ____.

Accepted Answer

When a compiler detects a violation of language rules, it cannot translate the code to machine code, which is the binary language that the computer can understand and execute.

Question 18

When you run a Java application using the ____ command, do not add the .class extension to the filename.

Accepted Answer

The correct command to run a Java application is "java" followed by the name of the class, without the .class extension. Therefore, the best choice is C.

Question 19

It is best to use the ____ available text editor when writing Java programs.

Accepted Answer

It is best to use a simple text editor when writing Java programs, as it avoids any unnecessary complications and allows for better focus on the code itself. More complex editors may have additional features that are not needed for Java programming, and may even lead to errors or confusion.

Question 20

The ____ is also called the Java class library; it contains information about how to use every prewritten Java class, including lists of all the methods you can use with the classes.

Accepted Answer

The Java API (Application Programming Interface) contains information about every prewritten Java class, including lists of all the methods you can use with the classes. It is also known as the Java class library. The Java SDK (Software Development Kit) is a bundle of software used for developing Java applications, which includes the Java API. Java package and Java interface are specific features of the Java programming language and are not synonymous with the Java API.

Quiz 1: Creating Your First Java Classes