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Test Status
COREJAVARANDOMTEST
Ques 1 :
Which of the following statements is true?
(A) An exception can be thrown by throw keyword explicitly.
(B) An exception can be thrown by throws keyword explicitly.
Ques 2 :
Assume that the value 3929.92 is of type â??floatâ??. How to assign this value after declaring the variable â??interestâ?? of type float?
(A) interest = 3929.92
(B) interest = (Float)3929.92
(C) interest = 3929.92 (float)
(D) interest = 3929.92f
Ques 3 :
Which of these statements are legal. Select the three correct answers.
a.
int arr[][] = new int[5][5];
b.
int []arr[] = new int[5][5];
c.
int[][] arr = new int[5][5];
d.
int[] arr = new int[5][];
e.
int[] arr = new int[][5];
(A) a, b
(B) a, b, c
(C) a, b, c, d
(D) a, b, c, d, e
Ques 4 :
Which all lines are part of the output when the following code is compiled and run. Select the six correct answers.
public class test
{
public static void main(String args[])
{
outer:
for(int i = 0; i < 3; i++)
{
for(int j = 3; j >= 0; j--)
{
if(i == j) continue outer;
System.out.println(i + " " + j);
}
}
}
}
a.
0 0
b.
0 1
c.
0 2
d.
0 3
e.
1 0
f.
1 1
g.
1 2
h.
1 3
i.
2 0
j.
2 1
k.
2 2
l.
2 3
m.
3 0
n.
3 1
o.
3 2
p.
3 3
(A) a, b, d, f, h, j
(B) d, g, j, k, m, n
(C) b, c, d, g, h, l
(D) c, g, h, l, n, o
Ques 5 :
Which of the following are legal declaration and definition of a method. Select all correct answers.
a.
void method() {};
b.
void method(void) {};
c.
method() {};
d.
method(void) {};
e.
void method {};
(A) a,b
(B) a
(C) a,b,c
(D) b,d,e
Ques 6 :
What gets printed when the following program is compiled and run? Select the one correct answer.
class test {
public static void main(String args[]) {
int i;
do {
i++;
}
while(i < 0);
System.out.println(i);
}
}
(A) The program does not compile as i is not initialized.
(B) The program compiles but does not run.
(C) The program compiles and runs but does not print anything.
(D) The program prints 0.
Ques 7 :
Which of the following statements is true?
(A) The default char data type is a space( â?? â?? ) character.
(B) The default integer data type is â??longâ?? and real data type is â??floatâ??
(C) The default integer data type is â??intâ?? and real data type is â??doubleâ??
(D) The default integer data type is â??intâ?? and real data type is â??floatâ??
Ques 8 :
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
(C) a, d, e
(D) a, c, d
Ques 9 :
Which of the following statements declare class Sample to belong to the payroll.admindept package?
(A) package payroll;package admindept;
(B) package payroll.admindept.Sample;
(C) package payroll.admindept;
(D) import payroll.admindept.*
Ques 10 :
Which of the following are keywords in Java.
(A) implement
(B) friend
(C) NULL
(D) synchronized
Ques 11 :
Which statement is true for the Class java.util.HashSet?
(A) The elements in the collection are unique.
(B) The collection is guaranteed to be immutable
(C) The elements in the collection are ordered.
(D) The elements in the collection are synchronized.
Ques 12 :
Select the one correct answer. The number of characters in an object of a class String is given by
(A) The member variable called size
(B) The member variable called length
(C) The method size() returns the number of characters.
(D) The method length() returns the number of characters.
Ques 13 :
Which of the following are legal identifier names in Java. Select the two correct answers.
a.
%abcd
b.
$abcd
c.
1abcd
d.
package
e.
_a_long_name
(A) a, c
(B) b, d
(C) b, e
(D) a, e
Ques 14 :
What is an aggregate object?
(A) An object with only primitive attributes
(B) An instance of a class which has only static methods
(C) An instance which has other objects
(D) None of the above
Ques 15 :
Which of these are legal identifiers.
(A) number_1
(B) number_a
(C) $1234
(D) All of the above.
Ques 16 :
Which of the following are true about interfaces. Select the two correct answers.
a.
Methods declared in interfaces are implicitly private.
b.
Variables declared in interfaces are implicitly public, static, and final.
c.
An interface can extend any number of interfaces.
d.
The keyword implements indicate that an interface inherits from another.
(A) a, b
(B) c, d
(C) b, d
(D) b, c
Ques 17 :
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'
(C) 'c'
(D) 'd'
Ques 18 :
When a thread terminates its processing, into what state that thread enters?
(A) Dead state
(B) Waiting state
(C) Running state
(D) Beginning state
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[]) {
boolean x = false;
int a;
if(x) a = x ? 1: 2;
else a = x ? 3: 4;
System.out.println(a);
}
}
(A) 1
(B) 2
(C) 3
(D) 4
Ques 20 :
Using up to four characters, write the Java representation of octal literal 6.
(A) 06
(B) 006
(C) 0006
(D) all of above
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