.  .
Quiz by , created more than 1 year ago

Second part of previous quiz.

46
0
0
 .  .
Created by . . almost 8 years ago
Close

OCAJP7 part 2

Question 1 of 6

1

Select the one most appropriate answer. What is the purpose of method parseInt defined in Integer class.

Select one of the following:

  • 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.

  • The method is used to convert String to Integer class, assuming that the String represents an integer.

  • The method converts the Integer object to a String.

Explanation

Question 2 of 6

1

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.

Select one of the following:

  • The run() method should be directly invoked on the Object.

  • The start() method should be directly invoked on the Object.

  • The init() method should be directly invoked on the Object.

  • The creation of the object using the new operator would create a new thread and invoke its run() method.

Explanation

Question 3 of 6

1

Which of the following statements are correct. Select the four correct answers.

Select one or more of the following:

  • A Java program must have a package statement.

  • A package statement if present must be the first statement of the program (barring any comments).

  • If a Java program defines both a package and import statement, then the import statement must come before the package statement.

  • An empty file is a valid source file.

  • 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.

Explanation

Question 4 of 6

1

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");
}
}

Select one of the following:

  • The program compiles and runs but does not generate any output.

  • The program compiles and runs generating an output of "test"

  • The program compiles but does not run.

  • The program does not compile as there is no main method defined

Explanation

Question 5 of 6

1

Which of the following statements are true. Select the one correct answer.

Select one of the following:

  • Arrays in Java are essentially objects.

  • It is not possible to assign one array to another. Individual elements of array can however be assigned

  • Array elements are indexed from 1 to size of array.

  • If a method tries to access an array element beyond its range, a compile warning is generated.

Explanation

Question 6 of 6

1

The class java.lang.Exception is ?

Select one or more of the following:

  • protected

  • implements Throwable

  • implements Serializable

  • extends Throwable

Explanation