Tag: java

Question 1

What will happen when you attempt to compile and run the following code


public class Hope{
    public static void main(String argv[]){
        Hope h = new Hope();
    }
    protected Hope(){
        for(int i =0;
        i &lt;10;
        i ++){
            System.out.println(i);
        }
    }
}

java

Compilation and running with output 0 to 9
Run time error: Constructors cannot be declared protected
Compilation error: Constructors cannot be declared protected
Compilation and running with output 0 to 10
None of the above

Answer

Correct Option: A

Question 2

What is output of the above program?

Class conditional {
 public static void main(String args[]) {
  int i = 20;
  int j = 55;
  int z = 0;
  z = i &lt; j ? i : j; // ternary operator
  System.out.println("The value assigned is " + z);
 }
}

java

20
55
None of the above

Answer

Correct Option: A

Question 3

Which of the following statements are true?

java

Strings are a primitive type in Java and the StringBuffer is used as the matching wrapper type
The size of a string can be retrieved using the length property.
Strings are a primitive type in Java that overloads the + operator for concatenation
The String class is implemented as a char array, elements are addressed using the stringname[] convention

Answer

Correct Option: C

Question 4

A class cannot be declared:

java

Static
Private
Default
None of the above

Answer

Correct Option: B

Question 5

Following code will result in:

int a1 = 5; 
double a2 = (float)a1;

java

Compilation error
Runtime error
No errors
Execptions

Answer

Correct Option: C

Question 6

Following code will result in:

class A {
  int b = 1;
  public static void main(String [] args) {
       System.out.println("b is " + b);
 }
}

java

Compilation error
Runtime Error
Runtime Exception
Output of b is 1

Answer

Correct Option: A

Question 7

Following code will result in:

class A { 
   public static void main(String [] args) {
       B b = new A(); 
   }
} 
class B extends A {}

java

Compilation error
Runtime Error
Runtime Exception
Other Execptions

Answer

Correct Option: A

Question 8

What is an instance of

java

A methods in object
An operator and keyword
Both
None

Answer

Correct Option: B

Question 9

What happens when you do if (a==b)?

Integer a = new Integer(2);
 Integer b = new Integer(2);

java

Compiler error
Runtime Exception
FALSE

Answer

Correct Option: C

Question 10

What is the size of a Char?

java

4 bits
7 bits
8 bits
16 bits

Answer

Correct Option: D

Tag: java

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