JAVA CRACKERS

Java Test3

 

 

Question 1

class SRC102 {

public static void main (String[] args)

{

int i1 = Math.round(0.5f);

int i2 = Math.round(1.5d);

System.out.print(i1 + "," + i2);

}}

What is the result of attempting to compile

and run the program?

a.     Prints: 0,1

b.     Prints: 0,2

c.     Prints: 1,1

d.     Prints: 1,2

e.     Compile-time error

f.     Run-time error

g.     None of the above

 

 

Question 2

class A {

public static void main (String args[]) {

byte primitiveByte = 1; // 1

Byte b1 = new Byte(primitiveByte); // 2

Byte b2 = new Byte(1); // 3

System.out.print(b1.byteValue() + b2.byteValue());

}}

What is the result of attempting to compile

and run the program?

a.     Prints: 2

b.     Prints: 11

c.     Compile-time error at 1

d.     Compile-time error at 2

e.     Compile-time error at 3

f.     Run-time error

g.     None of the above

 

Question 3

class A {

public static void main(String[] args) {

Boolean b1 = new Boolean(true); // 1

Boolean b2 = new Boolean(false); // 2

Boolean b3 = new Boolean(TRUE); // 3

Boolean b4 = new Boolean(FALSE); // 4

Boolean b5 = new Boolean("TrUe"); // 5

Boolean b6 = new Boolean("fAlSe"); // 6

}}

Compile-time errors are generated

at which lines?

a.     1

b.     2

c.     3

d.     4

e.     5

f.     6

 

 

Question 4

class SRC103 {

public static void main (String[] args) {

int i1 = Math.round(0.5f);

int i2 = Math.round(1.5f);

System.out.print(i1 + "," + i2);

}}

What is the result of attempting to compile

and run the program?

a.     Prints: 0,1

b.     Prints: 0,2

c.     Prints: 1,1

d.     Prints: 1,2

e.     Compile-time error

f.     Run-time error

g.     None of the above

 

 

Question 5

class MWC102 {

public static void main (String[] args) {

String s1 = "ABCDE";

System.out.print(s1.substring(1,2)+s1.substring(3));

}}

What is the result of attempting to compile

and run the program?

a.     Prints: AABC

b.     Prints: ACDE

c.     Prints: ABABC

d.     Prints: ABCDE

e.     Prints: BABCD

f.     Prints: BDE

g.     Prints: BCABCD

h.     Prints: BCDE

i.     Compile-time error

j.     Run-time error

k.     None of the above

 

 

Question 6

Which of the following are not methods of the java.lang.String class?

a.     append

b.     concat

c.     delete

d.     insert

e.     replace

f.     substring

g.     valueOf