Practise Test-1

what is the ideal time for starting usage of static analyzers?

• as soon as coding starts

• once all the coding is over

• along with system testing

• after unit testing

which expression will extract substring "kap" from String str="kakapo"?

• str.substring(2,2)

• str.substring(2,3)

• str.substring(2,4)

• str.substring(2,5)

Which one of the following primitive type conversion is

permitted implicitly without using casting?

• long to int

• float to double

• double to long

• double to float

Which of the field declaration is legal within the body of

an interface?

• protected static int answer = 42;

• volatile static int answer = 42;

• int answer = 42;

• private final static int answer = 42;

Which one of the expressions will evaluate to true if precededby the following code? String a = "hello"; String b = new String(a); String c = a; char[] d = { ‘h’, ‘e’, ‘l’, ‘l’, ‘o’ };

• (a == "Hello")

• (a == b)

• a.equals(b)

• a.equals(d)

Which method is not defined in the String class?

• reverse()

• length()

• concat(String)

• hashCode()

Suppose you are creating a class named Button that you want to include in a group of related classes called controls. Identify the correct code that includes the class in that group.

• public class Button

• package controls;

• import controls;

• package Button;

Given the following, 1. public class MyProgram {

2. public static void main(String args[]){

3. try

{ 4. System.out.print("Hello world ");

5. }

6. finally {

7. System.out.println("Finally executing ");

8. }

9. }

10. }

• Nothing. The program will not compile because no exceptions are specified.

• Nothing. The program will not compile because no catch clauses are specified.

• Hello world.

• Hello world Finally executing

6. Both class Error and class Exception are children of this parent:

• Throwable

• Catchable

• Runnable

• Problem

Which of the following lists exception types from MOST specific to LEAST specific?

• Error, Exception

• Exception, RunTimeException

• Throwable, RunTimeException

• ArithmeticException, RunTimeException