Online Random Test

(C) A possible syntax of assert statement is assert logical_expression If logical_expression evaluates to true, the program generates an AssertionError.

(D) The program terminates on its first AssertionError.

Ques 6 :
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 = 3 & 5;
y = 3 | 5;
System.out.println(x + " " + y);
}
}

(A) 7 1

(B) 3 7

(D) 1 3

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

(A) float

(B) double

(D) Double

Ques 8 :
Which cannot directly cause a thread to stop executing?

(A) Calling the notify method on an object.

(B) Calling the start method on another Thread object.

(D) Calling wait method on an object.

Ques 9 :
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 10 :
Given the following declarations, which of the assignments given in the options below would compile. Select the two correct answers.
int i = 5;
boolean t = true;
float f = 2.3F;
double d = 2.3;

a. t = (boolean) i;
b. f = d;
c. d = i;
d. i = 5;
e. f = 2.8;

(A) a,b

(B) b,c

(D) a,d

Ques 11 :
Which of these are legal identifiers.

(A) number_1

(B) number_a

(D) All of the above.

Ques 12 :
public void test(int x)
{
int odd = 1;
if(odd) /* Line 4 */
{
System.out.println("odd");
}
else
{
System.out.println("even");
}
}
Which statement is true?

(A) "odd" will always be output.

(B) "even" will always be output.

(D) "odd" will be output for odd values of x, and "even" for even values.

Ques 13 :
nt index = 1;
Boolean [] test = new Boolean[3];
Boolean data = test[index];
What is the result?

(A) data has the value of true

(B) The code will not compile.

(D) data has the value of null

Ques 14 :
Which of these is a legal definition of a method named m assuming it throws IOException, and returns void. Also assume that the method does not take any arguments. Select the one correct answer.

(A) void m() throws IOException{}

(B) void m() throw IOException{}

(D) void m() {} throws IOException

Ques 15 :
Which of the following statements is true?

(A) The default char data type is a space( �?? �?? ) character.

(B) The default integer data type is �??long�?? and real data type is �??float�??

(D) The default integer data type is �??int�?? and real data type is �??float�??

Ques 16 :
What all gets printed when the following program is compiled and run. Select the two correct answers.

public class test {
public static void main(String args[]) {
int i, j=1;
i = (j>1)?2:1;
switch(i) {
case 0: System.out.println(0); break;
case 1: System.out.println(1);
case 2: System.out.println(2); break;
case 3: System.out.println(3); break;
}
}
}
a. 0
b. 1
c. 2
d. 3

(A) a, b

(B) b, c

(D) c, d

Ques 17 : 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 18 :
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 = 1 & 7;
y = 3 ^ 6;
System.out.println(x + " " + y);
}
}

(A) 1 3

(B) 3 5

(D) 1 5

Ques 19 : What is the number of bytes used by Java primitive long. Select the one correct answer.

(A) The number of bytes is compiler dependent.

(B) 2

(D) 8

Ques 20 :
A lower precision can be assigned to a higher precision value in Java. For example a byte type data can be assigned to int type.

(A) True

(B) False