5368940
Pregunta 1
Pregunta
Select the one most appropriate answer. What is the purpose of method parseInt defined in Integer class.
Respuesta
-
The method converts an integer to a String.
-
The method is used to convert String to an integer, assuming that the String represents an integer.
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The method is used to convert String to Integer class, assuming that the String represents an integer.
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The method converts the Integer object to a String.
Pregunta 2
Pregunta
What should be done to invoke the run() method on a thread for an object derived from the Thread class. Select the one correct answer.
Respuesta
-
The run() method should be directly invoked on the Object.
-
The start() method should be directly invoked on the Object.
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The init() method should be directly invoked on the Object.
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The creation of the object using the new operator would create a new thread and invoke its run() method.
Pregunta 3
Pregunta
Which of the following statements are correct. Select the four correct answers.
Respuesta
-
A Java program must have a package statement.
-
A package statement if present must be the first statement of the program (barring any comments).
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If a Java program defines both a package and import statement, then the import statement must come before the package statement.
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An empty file is a valid source file.
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A Java file without any class or interface definitions can also be compiled.
-
If an import statement is present, it must appear before any class or interface definitions.
Pregunta 4
Pregunta
What would be the results of compiling and running the following class. Select the one correct answer.
class test
{
public static void main()
{
System.out.println("test");
}
}
Respuesta
-
The program compiles and runs but does not generate any output.
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The program compiles and runs generating an output of "test"
-
The program compiles but does not run.
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The program does not compile as there is no main method defined
Pregunta 5
Pregunta
Which of the following statements are true. Select the one correct answer.
Respuesta
-
Arrays in Java are essentially objects.
-
It is not possible to assign one array to another. Individual elements of array can however be assigned
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Array elements are indexed from 1 to size of array.
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If a method tries to access an array element beyond its range, a compile warning is generated.
Pregunta 6
Pregunta
The class java.lang.Exception is ?
Respuesta
-
protected
-
implements Throwable
-
implements Serializable
-
extends Throwable
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