Time remaining
:
:
Test Status
COREJAVARANDOMTEST
Ques 1 :
What is the range of values that can be specified for an int. Select the one correct answer.
(A) The range of values is compiler dependent.
(B) -231 to 231 - 1
(C) 231-1 to 231
(D) -215 to 215 - 1
Ques 2 :
Which of these statements is true?
(A) AbstractSet extends Set
(B) LinkedList extends List
(C) HashSet extends AbstractSet
(D) WeakHashMap extends HashMap
Ques 3 :
Which of the following statements about the Java language is true?
(A) Both procedural and OOP are supported in Java.
(B) Java supports only procedural approach towards programming.
(C) Java supports only OOP approach.
(D) None of the above.
Ques 4 :
What happens when the following program is compiled and run. Select the one correct answer.
public class example
{
int i[] = {0};
public static void main(String args[])
{
int i[] = {1};
change_i(i);
System.out.println(i[0]);
}
public static void change_i(int i[])
{
i[0] = 2;
i[0] *= 2;
}
}
(A) The program prints 0
(B) The program prints 1.
(C) The program prints 2
(D) The program prints 4.
Ques 5 :
What is the result of evaluating the expression 14 ^ 23. Select the one correct answer.
(A) 23
(B) 24
(C) 25
(D) 26
Ques 6 :
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[]) {
String s1 = "abc";
String s2 = new String("abc");
if(s1 == s2)
System.out.println(1);
else
System.out.println(2);
if(s1.equals(s2))
System.out.println(3);
else
System.out.println(4);
}
}
(A) 1 3
(B) 1 4
(C) 2 3
(D) 2 4
Ques 7 :
What happens when the following program is compiled and executed with the command - java test. Select the one correct answer.
class test
{
public static void main(String args[])
{
if(args.length > 0)
System.out.println(args.length);
}
}
(A) The program compiles and runs but does not print anything.
(B) The program compiles and runs and prints 0
(C) The program compiles and runs and prints 1
(D) The program compiles and runs and prints 2
Ques 8 :
Consider the following code snippet. What will be assigned to the variable fourthChar, if the code is executed?
String str = new String("Java");
char fourthChar = str.charAt(4);
(A) 'a'
(B) 'v'
(C) throws StringIndexOutofBoundsException
(D) null characater
Ques 9 :
Which of the following are Java keywords. Select the four correct answers.
a.
super
b.
strictfp
c.
void
d.
synchronize
e.
instanceof
(A) a, b
(B) a, b, c, e.
(C) b, c, d
(D) a, c, d, e
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
(C) c,d
(D) a,d
Ques 11 :
What happens when the following program is compiled and run. Select the one correct answer.
public class example
{
int i[] = {0};
public static void main(String args[])
{
int i[] = {1};
change_i(i);
System.out.println(i[0]);
}
public static void change_i(int i[])
{
int j[] = {2};
i = j;
}
}
(A) The program prints 0.
(B) The program prints 2.
(C) The program prints 1.
(D) The program prints 4.
Ques 12 :
Which of the following are keywords in Java. Select the two correct answers.
a.
friend
b.
NULL
c.
implement
d.
synchronized
e.
throws
(A) d, e
(B) a, b
(C) a, b, c
(D) all of above
Ques 13 :
Which of the following statements are true. Select the two correct answers.
a.
The wait method defined in the Thread class, can be used to convert a thread from Running state to Waiting state.
b.
The wait(), notify(), and notifyAll() methods must be executed in synchronized code.
c.
The notify() and notifyAll() methods can be used to signal and move waiting threads to ready-to-run state.
d.
The Thread class is an abstract class.
(A) a, c
(B) a, d
(C) b, c
(D) c, d
Ques 14 :
Name the access modifier which when used with a method, makes it available to all the classes in the same package and to all the subclasses of the class.
(A) public
(B) protected
(C) private
(D) default
Ques 15 :
What gets printed when the following program is compiled and run? Select the one correct answer.
class test
{
static boolean check;
public static void main(String args[])
{
int i;
if(check == true)
i=1;
else
i=2;
if(i=2) i=i+2;
else i = i + 4;
System.out.println(i);
}
}
(A) 3
(B) 4
(C) 5
(D) The program does not compile because of the statement if(i=2)
Ques 16 :
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
(C) 1 7
(D) 1 3
Ques 17 :
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;
x = -3 >> 1;
x = x >>> 2;
x = x << 1;
System.out.println(x);
}
}
(A) 7
(B) 23
(C) 5
(D) 2147483646
Ques 18 :
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[] arr = {1,2,3,4};
call_array(arr[0], arr);
System.out.println(arr[0] + "," + arr[1]);
}
static void call_array(int i, int arr[])
{
arr[i] = 6;
i = 5;
}
}
(A) 1,2
(B) 5,2
(C) 1,6
(D) 5,6
Ques 19 :
Which of the following are valid constructors within a class Test. Select the two correct answers.
a.
test() { }
b.
Test() { }
c.
void Test() { }
d.
private final Test() { }
e.
abstract Test() { }
f.
Test(Test t) { }
g.
Test(void) { }
(A) b, d
(B) c, f
(C) b, c
(D) b, f
Ques 20 :
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.
(C) Calling a yield method.
(D) Calling wait method on an object.
Submit Answer
Don't Refresh the Page !! ...
