Select the one most appropriate answer. What is the purpose of method parseInt defined in Integer class.
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.
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.
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.
Which of the following statements are correct. Select the four correct answers.
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.
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"); } }
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
Which of the following statements are true. Select the one correct answer.
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.
The class java.lang.Exception is ?
protected
implements Throwable
implements Serializable
extends Throwable
