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Note: This quiz is designed only to assess if you are ready to join the our Examlab SCJP/OCPJP training course. This quiz will only show your score and your eligibility status, but does NOT necessarily provide answers, explanations, or any other exam features.

1)Which one of the following statements is true about overriding a method?

AThe sub class method cannot be final

BThe super class method cannot be final

CIf the super class method is final, the sub class method must be final too.

DThe sub class method cannot be public.

EThe super class method cannot be public

FIf the super class method is public, the sub class method must be public too

2)Which of the following statements are true? (choose two)

AAn abstract class cannot have final methods

BA final class cannot have abstract methods

CAn abstract class cannot have static methods

DA final class cannot have static methods.

EIf the super class has an abstract method, it must be overriden in the sub class method, unless the subclass also is abstract

FIf the super class has an abstract method, it must be overriden in the sub class method, regardless the subclass is abstract or not

3)Which of the followings ARE valid at the compile time? (choose three)

Aint x[][] x = new int[0][0][0]{}[0];

Bint x[][] = new int[][][]{}[-1];

Cint x[] = new int[1];

Dint x[] = new int[]{-1};

Eint x[] = new int[][]{}[-1];

Fint[] x = new int[]{new Integer(-1)};

4)What would be the result of attempting to compile and run the following code fragment?

int x = 0, y = 1;
for(int z = x + y; z < 5; z+= y) {
  System.out.print(++y + z);
}

APrints 31

BPrints 23

CPrints 30

DPrints 23

EPrints 36

FPrints 34

GCompilation fails

5)What would be the result of attempting to compile and run the following code fragment?

class A {
  static class B { }
  static class C extends A { }
  
  public static void main(String a[]) {
    new A().go();  
  }
  
  public void go() {
    pr(this instanceof C);
    pr(new C() instanceof A);
    pr(new Object() instanceof A);
    pr(this instanceof Object);
  }
  
  static void pr(Object o) {
    System.out.print(o + " ");
  }
}

APrints false false fale fale

BPrints false false false true

CPrints false false true true

DPrints false true false fale

EPrints false true false true

FPrints false true true false

GCompilation fails

6)Which of the following statements are true? (choose two)

AA protected method is visible only within that class itself

BA private method is visible only within that method itself

CA method with no visibility modifier is visible to all classes in the same package

DA private method is visible to all classes in the same package

EA protected method is visible to all subclasses of the class which contains that method.

FA method can be both protected and private at the same time

7)Which of the following expressions return the current date/time in milliseconds? (choose two)

Anew Date()

Bnew Date().getDate()

Cnew Date().getTime()

Dnew Date().getDate().getTime()

Enew Date(new Date().getTime())

Fnew Date(new Date()).getDate()

Gnew Date(new Date().getTime()).getTime()

Hnew Date(new Date()).getDate().getTime()

8)What would be the result of attempting to compile and run the following code fragment?

class A {
	
  static void go(){ }
  
  public static void main(String s[]) {
    A a = null;
    a.go();
  }
  
}

ACompiles, but nothing would print

BCompilation fails

CThrows NumberFormatException

DThrows NullPointerException

EThrows NullCannotBeDereferencedException

9)Which of the following statements are true? (choose two)

AHashSet.put(-) takes two parameters

BLinkedHashMap.add(-) takes two parameters

CArrayList.put(-) takes two parameters

DVector.add(-) takes two parameters

EHashMap.put(-) takes two parameters

FHashtable.add(-) takes two parameters

GLinkedHashMap.put(-) takes two parameters

10)Which of the followings are NOT Java operators? (choose two)

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