Oracle 1Z0-808 Quiz 1 Topic 1 Questions 1-5

Question: 1

Given the following class:

q1_1Z0-808

Which two changes would encapsulate this class and ensure that the area field is always equal to length * height whenever the Rectangle class is used?

ACall the setArea method at the end of the setHeight method.

BCall the setArea method at the beginning of the setHeight method.

CCall the setArea method at the end of the setLength method.

DCall the setArea method at the beginning of the setLength method.

EChange the setArea method to private.

FChange the area field to public.

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Question: 2

Given the code fragment:

q2_1Z0-808

Which two code fragments can be independently inserted at line n1 to enable the code to print the elements of the array in reverse order?

Awhile (x > 0) {x--;System.out.print(array[x]);}

Bdo {x--;System.out.print(array[x]);} while (x >= 0);

Cwhile (x >= 0) {System.out.print(array[x]);x--;}

Ddo {System.out.print(array[x]);--x;} while (x >= 0);

Ewhile (x > 0) {System.out.print(array[--x]);}

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Question: 3

Given:

class Test

int a1;

public static void doProduct(int a) {

a = a * a;

)

public static void doString(StringBuilder s) {

s.append('' '' + s);

}

public static void main(String[] args) {

Test item = new Test();

item.a1 = 11;

StringBuilder sb = new StringBuilder(''Hello'');

Integer i = 10;

doProduct(i);

doString(sb);

doProduct(item.a1);

System.out.println(i + '' '' + sb + '' '' + item.a1);

}

What is the result?

A10 Hello Hello 11

B10 Hello Hello 121

C100 Hello 121

D100 Hello Hello 121

E10 Hello 11

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Question: 4

Which two class definitions fail to compile?

Aabstract class A3 {private static int i;public void doStuff(){}public A3(){}}

Bfinal class A1 {public A1(){}}

Cpublic class A2 {private static int i;private A2(){}}

Dclass A4 {protected static final int i;private void doStuff(){}}

Efinal abstract class A5 {protected static int i;void doStuff(){}abstract void doIt();}

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Question: 5

The following grid shows the state of a 2D array:

q5_1Z0-808

This grid is created with the following code:

q5_1Z0-808

Which line of code, when inserted in place of //line n1, adds an X into the grid so that the grid contains three consecutive X's?

Agrid[1][3] = 'X';

Bgrid[3][1] = 'X';

Cgrid[0][2] = 'X';

Dgrid[2][0] = 'X';

Egrid[1][2] = 'X';

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Oracle 1Z0-808 Quiz:1 Topic:1 Questions:1-5