جافا Java

❓ ما ناتج بناء السلسلة داخل لوب؟
What does this string build print?

String s = "a";
for (int i = 0; i < 3; i++) s += i;
System.out.println(s);

🤩1

400 views07:39

جافا Java

❓ ما ناتج بناء السلسلة داخل لوب؟ What does this string build print?String s = "a"; for (int i = 0; i < 3; i++) s += i; System.out.println(s);

Choose your answer:

Anonymous Quiz

49 voters427 views07:39

جافا Java

❓ ما طول الصف الثاني؟
What is the length of the second row?

int[][] m = { {1,2}, {3,4,5} };
System.out.println(m[1].length);

366 views07:39

جافا Java

❓ ما طول الصف الثاني؟ What is the length of the second row?int[][] m = { {1,2}, {3,4,5} }; System.out.println(m[1].length);

Choose your answer:

Anonymous Quiz

53%

35%

13%

❤1

40 voters380 views07:39

جافا Java

❓ ما مجموع التأثير في switch مع default؟
Total effect in switch with default?

int x = 0;
int v = 3;
switch (v) {
  case 1: x += 1; break;
  case 2:
  case 3: x += 3;
  default: x += 5; break;
}
System.out.println(x);

358 views07:39

جافا Java

❓ ما مجموع التأثير في switch مع default؟ Total effect in switch with default?int x = 0; int v = 3; switch (v) { case 1: x += 1; break; case 2: case 3: x += 3; default: x += 5; break; } System.out.println(x);

Choose your answer:

Anonymous Quiz

22%

28%

50%

36 voters384 views07:39

جافا Java

❓ ما قيمة الحقل بعد إنشاء الكائن؟
What is the field value after object creation?

class A { int v = 1; A(){ v *= 2; } }
A a = new A();
System.out.println(a.v);

❤1

382 views07:39

جافا Java

❓ ما قيمة الحقل بعد إنشاء الكائن؟ What is the field value after object creation?class A { int v = 1; A(){ v *= 2; } } A a = new A(); System.out.println(a.v);

Choose your answer:

Anonymous Quiz

26%

71%

38 voters415 views07:39

جافا Java

❓ أي عبارة صحيحة عن Overloading/Overriding؟
Which statement is true about overloading/overriding?

380 views07:39

جافا Java

❓ أي عبارة صحيحة عن Overloading/Overriding؟ Which statement is true about overloading/overriding?

Choose your answer:

Anonymous Quiz

62%

Overloading allows same method name with different parameters in one class

24%

Overriding requires only a different return type

14%

Private methods can be overridden

42 voters424 views07:39

جافا Java

❓ ما ناتج التعامل مع static مقابل instance؟
What prints for static vs instance fields?

class C { static int s=0; int i=0; C(){ s++; i++; } }
C a = new C();
C b = new C();
System.out.println(C.s + "," + b.i);

369 views07:39

جافا Java

❓ ما ناتج التعامل مع static مقابل instance؟ What prints for static vs instance fields?class C { static int s=0; int i=0; C(){ s++; i++; } } C a = new C(); C b = new C(); System.out.println(C.s + "," + b.i);

Choose your answer:

Anonymous Quiz

40 voters400 views07:39

جافا Java

❓ ما أقل معدِّل وصول يسمح لوريث في حزمة مختلفة؟
What is the least permissive modifier that still allows a subclass in a different package to access a member?

370 views07:39

جافا Java

❓ ما أقل معدِّل وصول يسمح لوريث في حزمة مختلفة؟ What is the least permissive modifier that still allows a subclass in a different package to access a member?

Choose your answer:

Anonymous Quiz

21%

public

57%

protected (via inheritance)

21%

default (package-private)

42 voters398 views07:39

جافا Java

❓ سَلسَلة المُنشئات باستخدام this
Constructor chaining with this

class P {
  int x; 
  P(){ this(5); }
  P(int x){ this.x = x; }
}
System.out.println(new P().x);

384 views07:39

جافا Java

❓ سَلسَلة المُنشئات باستخدام this Constructor chaining with thisclass P { int x; P(){ this(5); } P(int x){ this.x = x; } } System.out.println(new P().x);

Choose your answer:

Anonymous Quiz

38 voters413 views07:39

جافا Java

❓ استخدام super في override
Using super in an override

class A { String f(){ return "A"; } }
class B extends A { String f(){ return super.f() + "B"; } }
System.out.println(new B().f());

363 views07:39

جافا Java

❓ استخدام super في override Using super in an overrideclass A { String f(){ return "A"; } } class B extends A { String f(){ return super.f() + "B"; } } System.out.println(new B().f());

Choose your answer:

Anonymous Quiz

19%

24%

57%

42 voters391 views07:39

جافا Java

❓ تعدد الأشكال (Polymorphism)
Polymorphism dispatch

class A { String f(){ return "A"; } }
class B extends A { String f(){ return "B"; } }
A x = new B();
System.out.println(x.f());

365 views07:39

جافا Java

❓ تعدد الأشكال (Polymorphism) Polymorphism dispatchclass A { String f(){ return "A"; } } class B extends A { String f(){ return "B"; } } A x = new B(); System.out.println(x.f());

Choose your answer:

Anonymous Quiz

38 voters401 views07:39

جافا Java

❓ instanceof مع الوراثة
instanceof with inheritance

class A {}
class B extends A {}
A x = new A();
System.out.println(x instanceof B);

385 views07:39

About

Blog

Apps

Platform