Online Test

Test Status

CORETEST5

Ques 1 : Which of the following is not a return type?

(A) boolean

(B) void

(D) Button

Ques 2 : What would happen when the following is compiled and executed. Select the one correct answer.

public class Compare {
public static void main(String args[]) {
int x = 10, y;
if(x < 10)
y = 1;
if(x>= 10) y = 2;
System.out.println("y is " + y);
}
}

(A) The program compiles and prints y is 0 when executed.

(B) The program compiles and prints y is 1 when executed.

(D) The program does not compile complaining about y not being initialized.

Ques 3 : Given two non-negative integers a and b and a String str, what is the number of characters in the expression str.substring(a,b) . Select the one correct answer.

(A) a + b

(B) a - b

(D) b - a - 1

Ques 4 : Which operator is used to perform bitwise exclusive or.

(A) &

(B) ^

(D) !

Ques 5 : What all gets printed when the following program is compiled and run. Select the one correct answer.

public class test {
public static void main(String args[]) {
int i=0, j=2;
do {
i=++i;
j--;
} while(j>0);
System.out.println(i);
}
}

(A) 0

(B) 1

(D) The program does not compile because of statement "i=++i;"

Ques 6 : If result = 2 + 3 * 5, what is the value and type of �??result�?? variable?

(A) 17, byte

(B) 25, byte

(D) 25, int

Ques 7 : What is the data type for the number 9.6352?

(A) float

(B) double

(D) Double

Ques 8 : What would happen when the following is compiled and executed. Select the one correct answer.

class example {
int x;
int y;
String name;
public static void main(String args[]) {
example pnt = new example();
System.out.println("pnt is " + pnt.name +
" " + pnt.x + " " + pnt.y);
}
}

(A) The program does not compile because x, y and name are not initialized.

(B) The program throws a runtime exception as x, y, and name are used before initialization.

(D) The program prints pnt is null 0 0.

Ques 9 : The initial value of an instance variable of type String that is not explicitly initialized in the program is --. Select the one correct answer.

(A) null

(B) ""

(D) The instance variable must be explicitly assigned.

Ques 10 : The initial value of a local variable of type String that is not explicitly initialized and which is defined in a member function of a class. Select the one correct answer.

(A) NULL

(B) ""

(D) The local variable must be explicitly assigned.

Ques 11 : What is the result of compiling and running the following program. Select the one correct answer.

class test {
public static void main(String args[]) {
char ch;
String test2 = "abcd";
String test = new String("abcd");
if(test.equals(test2)) {
if(test == test2)
ch = test.charAt(0);
else
ch = test.charAt(1);
}
else {
if(test == test2)
ch = test.charAt(2);
else
ch = test.charAt(3);
}
System.out.println(ch);
}
}

(A) 'a'

(B) 'b'

(D) 'd'

Ques 12 : What gets displayed on the screen when the following program is compiled and run. Select the one correct answer.

public class test {
public static void main(String args[]) {
boolean x = true;
int a;
if(x) a = x ? 1: 2;
else a = x ? 3: 4;
System.out.println(a);
}
}

(A) 1

(B) 2

(D) 4

Ques 13 : What is the result of compiling and running the following program. Select the one correct answer.

class test {
public static void main(String args[]) {
int i,j=0;
for(i=10;i<0;i--) { j++; }
switch(j) {
case (0) :
j=j+1;
case(1):
j=j+2;
break;
case (2) :
j=j+3;
break;
case (10) :
j=j+10;
break;
default :
break;
}
System.out.println(j);
}
}

(A) 1

(B) 2

(D) 3

Ques 14 : What gets displayed on the screen when the following program is compiled and run. Select the one correct answer.

public class test {
public static void main(String args[]) {
boolean x = false;
int a;
if(x) a = x ? 1: 2;
else a = x ? 3: 4;
System.out.println(a);
}
}

(A) 1

(B) 2

(D) 4

Ques 15 : What all gets printed when the following gets compiled and run. Select the three correct answers.
public class test {
public static void main(String args[]) {
int i=1, j=1;
try {
i++;
j--;
if(i/j > 1)
i++;
}
catch(ArithmeticException e) {
System.out.println(0);
}
catch(ArrayIndexOutOfBoundsException e) {
System.out.println(1);
}
catch(Exception e) {
System.out.println(2);
}
finally {
System.out.println(3);
}
System.out.println(4);
}
}

a. 0
b. 1
c. 2
d. 3
e. 4

(A) a, b, c

(B) b, c, d

(D) a, c, d

Ques 16 : Assume that the value 3929.92 is of type �??float�??. How to assign this value after declaring the variable �??interest�?? of type float?

(A) interest = 3929.92

(B) interest = (Float)3929.92

(D) interest = 3929.92f

Ques 17 : Which of the following are legal Java programs. Select the four correct answers.
a. // The comments come before the package
package pkg;
import java.awt.;
class C{}
b. package pkg;
import java.awt.;
class C{}
c. package pkg1;
package pkg2;
import java.awt.;
class C{}
d. package pkg;
import java.awt.;
e. import java.awt.;
class C{}
f. import java.awt.;
package pkg;
class C {}

(A) a, b, c, d

(B) a, b, d, e

(D) c, d, e, f

Ques 18 : What is the number displayed when the following program is compiled and run.

class test {
public static void main(String args[]) {
test test1 = new test();
System.out.println(test1.xyz(100));
}
public int xyz(int num) {
if(num == 1) return 1;
else return(xyz(num-1) + num);
}
}

(A) 4040

(B) 5050

(D) 5055

Ques 19 : What gets displayed on the screen when the following program is compiled and run. Select the one correct answer.

public class test {
public static void main(String args[]) {
int x, y;

x = 5 >> 2;
y = x >>> 2;
System.out.println(y);
}
}

(A) 5

(B) 2

(D) 0

Ques 20 : What all gets printed when the following gets compiled and run. Select the two correct answers.

public class test {
public static void main(String args[]) {
int i=1, j=1;
try {
i++;
j--;
if(i == j)
i++;
}
catch(ArithmeticException e) {
System.out.println(0);
}
catch(ArrayIndexOutOfBoundsException e) {
System.out.println(1);
}
catch(Exception e) {
System.out.println(2);
}
finally {
System.out.println(3);
}
System.out.println(4);
}
}

a. 0
b. 1
c. 2
d. 3
e. 4

(A) a, b

(B) b, c

(D) d, e

Don't Refresh the Page !! ...