1- Which three are valid method signatures in an interface? private int getArea(); public float getVol(float x); public void main(String [] args); public static void main(String [] args); boolean setFlag(Boolean [] test); A- 1 and 2 B- 2, 3 and 5 C- 3, 4, and 5 D- 2 and 4 2- You want a class to have access to members of another class in the same package. Which is the most restrictive access that accomplishes this objective? A- public B- private C- protected D- default access 3- What is the narrowest valid returnType for methodA in line 3? public class ReturnIt { returnType methodA(byte x, double y) /* Line 3 */ { return (long)x / y * 2; } } A- int B- byte C- long D- double 4- class A { protected int method1(int a, int b) { return 0; } } Which is valid in a class that extends class A? A- public int method1(int a, int b) {return 0; } B- private int method1(int a, int b) { return 0; } C- public short method1(int a, int b) { return 0; } D- static protected int method1(int a, int b) { return 0; } 5- Which one creates an instance of an array? A- int[ ] ia = new int[15]; B- float fa = new float[20]; C- char[ ] ca = "Some String"; D- int ia[ ] [ ] = { 4, 5, 6 }, { 1,2,3 }; 6- Which two of the following are legal declarations for nonnested classes and interfaces? final abstract class Test {} public static interface Test {} final public class Test {} protected abstract class Test {} protected interface Test {} abstract public class Test {} A- 1 and 4 B- 2 and 5 C- 3 and 6 D- 4 and 6 7- Which of the following class level (nonlocal) variable declarations will not compile? A- protected int a; B- transient int b = 3; C- private synchronized int e; D- volatile int d; 8- Which two cause a compiler error? float[ ] f = new float(3); float f2[ ] = new float[ ]; float[ ]f1 = new float[3]; float f3[ ] = new float[3]; float f5[ ] = {1.0f, 2.0f, 2.0f}; A- 2, 4 B- 3, 5 C- 4, 5 D- 1, 2 9- Given a method in a protected class, what access modifier do you use to restrict access to that method to only the other members of the same class? A- final B- static C- private D- protected 10- Which is a valid declaration within an interface? A- public static short stop = 23; B- protected short stop = 23; C- transient short stop = 23; D- final void madness(short stop);
Posted on: Sat, 08 Jun 2013 23:09:11 +0000
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