5368940
Questão 1
Questão
Select the one most appropriate answer. What is the purpose of method parseInt defined in Integer class.
Responda
-
The method converts an integer to a String.
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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.
Questão 2
Questão
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.
Responda
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The run() method should be directly invoked on the Object.
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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.
Questão 3
Questão
Which of the following statements are correct. Select the four correct answers.
Responda
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A Java program must have a package statement.
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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.
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If an import statement is present, it must appear before any class or interface definitions.
Questão 4
Questão
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");
}
}
Responda
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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"
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The program compiles but does not run.
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The program does not compile as there is no main method defined
Questão 5
Questão
Which of the following statements are true. Select the one correct answer.
Responda
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Arrays in Java are essentially objects.
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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.
Questão 6
Questão
The class java.lang.Exception is ?
Responda
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protected
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implements Throwable
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implements Serializable
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extends Throwable
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