Questions and answers for exam Preparation

MCQs

Total Questions : 45 | Page 2 of 5 pages

Question 11. Determine output:
public class Test {
static void test(float x){
System.out.print("float");
}
static void test(double x){
System.out.print("double");
}
public static void main(String[] args){
test(99.9);
}
}

float
double
Compilation Error
Exception is thrown at runtime

Discuss Question

Answer: Option B. -> double

Question 12. What would be the output of the following fraction of code ?
int Integer = 34 ;
char String = 'S' ;
System.out.print( Integer ) ;
System.out.print( String ) ;

Does not compile as Integer and String are API class names.
Throws exception.
34
S
34 S

Discuss Question

Answer: Option E. -> 34 S

Question 13. The following fraction of code
double STATIC = 2.5 ;
System.out.println( STATIC );

Prints 2.5
Rraises an error as STATIC is used as a variable which is a keyword
Raises an exception
None of these

Discuss Question

Answer: Option A. -> Prints 2.5

Question 14. What is the output of the following program?
public class Test{
static int x = 10 ;
public static void main(String[] a){
Test test = new Test( ) ;
Test test1 = new Test( ) ;
test.x += 1 ;
System.out.println( test.x + test1.x ) ;
}
}

20
21
22
Compilation Error
Throws Exception

Discuss Question

Answer: Option C. -> 22

Question 15. What will be output of the following program code?
public class Test{
public static void main(String[] a){
short x = 10;
x = x*5;
System.out.print(x);
}
}

50
10
Compilation Error
None of these

Discuss Question

Answer: Option C. -> Compilation Error

Question 16. Determine output:
public class Test{
int i = 34;
public static void main(String args[]){
Test t1 = new Test();
Test t2 = new Test();
t1.i = 65;
System.out.print(t1.i);
System.out.print(t2.i);
}
}

34 34
65 34
65 65
34 65

Discuss Question

Answer: Option B. -> 65 34

Question 17. The following program:
public class Test{
static boolean isOK;
public static void main(String args[]){
System.out.print(isOK);
}
}

Prints true
Prints false
Will not compile as boolean is not initialized
Will not compile as boolean can never be static

Discuss Question

Answer: Option B. -> Prints false

Question 18. What will the output of the following program?
public class Test{
public static void main(String args[]){
float f = (1 / 4) * 10;
int i = Math.round(f);
System.out.println(i);
}
}

Discuss Question

Answer: Option B. -> 0

Question 19. In Java, the word true is ................

A Java keyword
A Boolean literal
Same as value 1
Same as value 0

Discuss Question

Answer: Option B. -> A Boolean literal

Question 20. What is the output for the below code ?
class A{
int k;
boolean istrue;
static int p;
public void printValue(){
System.out.print(k);
System.out.print(istrue);
System.out.print(p);
}
}
public class Test{
public static void main(String argv[]){
A a = new A();
a.printValue();
}
}