Set – 4
1.try
{
Float f1 = new Float("3.0");
int x = f1.intValue();
byte b = f1.byteValue();
double d = f1.doubleValue();
System.out.println(x + b + d);
}
catch (NumberFormatException e) /* Line 9 */
{
System.out.println("bad number"); /* Line
11 */
}
A. 9.0
B. bad number
C. Compilation fails on line 9.
D. Compilation fails on line 11.
2.class Q207
{
public static void main(String[] args)
{
int i1 = 5;
int i2 = 6;
String s1 = "7";
System.out.println(i1 + i2 + s1); /*
Line 8 */
}
}
A. 18
B. 117
C. 567
D. Compiler error
3.String a = "newspaper";
a = a.substring(5,7);
char b = a.charAt(1);
a = a + b;
System.out.println(a);
A. apa
B. app
C. apea
D. apep
4.String d = "bookkeeper";
d.substring(1,7);
d = "w" + d;
d.append("woo"); /* Line 4 */
System.out.println(d);
A. wookkeewoo
B. wbookkeeper
C. wbookkeewoo
D. Compilation fails.
5.String a = "ABCD";
String b = a.toLowerCase();
b.replace('a','d');
b.replace('b','c');
System.out.println(b);
A. abcd
B. ABCD
C. dccd
D. dcba
6.class ForSample
{
public static void main(String s[])
{
for(int i = 0; i <= 5; i++ )
{
System.out.println("i = " + i );
}
}
}
A.i = 0
i = 1
i = 2
i = 3
i = 4
i = 5
B.i = 0
i = 1
i = 2
i = 3
i = 4
C.Compilation Errors
D.i = 1
i = 2
i = 3
i = 4
7.class Super {
public int index = 1;
}
class App extends Super {
public App(int index) {
index = index;
}
public static void main(String args[]) {
App myApp = new App(10);
System.out.println(myApp.index);
}
}
A. 0
B. 10
C. 1
D. Compile time error
8.class TestApp {
protected int x, y;
}
class Main {
public static void main(String args[]) {
TestApp app = new TestApp();
System.out.println(app.x + "
" + app.y);
}
}
A. 0 1
B. 1 0
C. 0 0
D. null null
9.class TestApp {
public static void main(String[] args) {
for (int index = 0; true; index++) {
System.out.println("Welcome");
break;
}
}
}
A. Welcome
B. None
C. Type mismatch error
D. Run infinite times
10.class TestApp {
int i[] = { 0 };
public static void main(String args[]) {
int i[] = { 1 };
alter(i);
System.out.println(i[0]);
}
public static void alter(int i[]) {
int j[] = { 2 };
i = j;
}
}
A. 0
B. 1
C. 2
D. Compilation error
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