جافا Java
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ليس عيبًا ألا تعرف شيئًا، ولكن العيب انك لا تريد أن تتعلم
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Which of the following is a valid Java statement to check if 'x' is either 10 or 20?
Anonymous Quiz
75%
if (x == 10 || x == 20) {}
13%
if (x = 10 || x = 20) {}
13%
if (x == 10 && x == 20) {}
0%
if (x = 10 && x = 20) {}
Correct the error in the following Java code snippet to properly encapsulate the 'name' field.

class Person {
public String name;
public String getName() {
return name;
}
public void setName(String newName) {
this.name = newName;
}
}
صحح الخطأ في الشفرة البرمجية جافا التالية لتغليف حقل 'name' بشكل صحيح.
How do you increment a variable `x` by 1 in Java?
Anonymous Quiz
32%
x++
11%
x+=1
2%
x=x+1
54%
All of the above
What will be the output of the following Java code snippet that demonstrates the use of static variables?

class Counter {
static int count = 0;
Counter() {
count++;
System.out.println(count);
}
}
public class TestCounter {
public static void main(String[] args) {
Counter c1 = new Counter();
Counter c2 = new Counter();
Counter c3 = new Counter();
}
}



ماذا سيكون المخرج للشفرة البرمجية جافا التالية التي توضح استخدام المتغيرات الثابتة؟
What is the default value of a boolean variable in Java?
Anonymous Quiz
17%
true
54%
false
23%
null
5%
0
What is the output of the following Java code snippet using polymorphism?

class Animal {
void sound() {
System.out.println("Animal makes a sound");
}
}
class Dog extends Animal {
void sound() {
System.out.println("Woof");
}
}
public class Test {
public static void main(String[] args) {
Animal myAnimal = new Dog();
myAnimal.sound();
}
}



ما هو مخرج الشفرة البرمجية جافا التالية باستخدام الشكلية البوليمورفية؟
What is the output of the following Java code?
```java
String str1 = "Java"; String str2 = new String("Java"); System.out.println(str1 == str2); ```
Anonymous Quiz
35%
true
38%
false
16%
Java
12%
An exception is thrown
Identify and fix the error in the following Java code snippet that attempts to implement polymorphism.

interface Shape {
void draw();
}
class Circle implements Shape {
public void draw() {
System.out.println("Circle drawn");
}
}
public class TestPolymorphism {
public static void main(String[] args) {
Shape shape = new Circle();
shape.draw();
}
}



حدد وأصلح الخطأ في الشفرة البرمجية جافا التالية التي تحاول تنفيذ الشكلية البوليمورفية.
Which of the following is not a valid Java data type?
Anonymous Quiz
5%
int
4%
double
7%
String
5%
boolean
79%
real
👍1
Identify and fix the error in the following Java code snippet to correctly demonstrate the concept of an abstract class.

abstract class Animal {
abstract void eat();
}
class Dog extends Animal {
void eat() {
System.out.println("Dog eats food");
}
}



حدد وأصلح الخطأ في الشفرة البرمجية جافا التالية لتوضيح مفهوم الصف المجرد بشكل صحيح.
What is the output
👍1
Which keyword is used to declare an array in Java?
Anonymous Quiz
7%
array
11%
Array
34%
[]
49%
There is no specific keyword; use the data type followed by []
Fix the error in the following Java code snippet to correctly compare two strings for equality.

String str1 = "Java";
String str2 = "java";
System.out.println(str1 == str2);



أصلح الخطأ في الشفرة البرمجية جافا التالية لمقارنة سلسلتين نصيتين بشكل صحيح من أجل المساواة.
Which method must be implemented by a class that implements the `java.lang.Runnable` interface?
Anonymous Quiz
52%
run()
17%
start()
23%
execute()
8%
perform()
What will be the output of the following Java code snippet that demonstrates the use of the ternary operator?

int a = 10, b = 5;
int result = (a > b) ? a : b;
System.out.println(result);



ماذا سيكون المخرج للشفرة البرمجية جافا التالية التي توضح استخدام العامل الثلاثي؟
What is the result of executing the following code snippet?
Which principle of Object-Oriented Programming allows a subclass to provide a specific implementation of a method that is already provided by one of its superclasses?
Anonymous Quiz
16%
Encapsulation
27%
Polymorphism
49%
Inheritance
8%
Composition
Fix the error in the following Java code snippet to correctly compare two strings for equality.

String str1 = "Java";
String str2 = "java";
System.out.println(str1 == str2);



أصلح الخطأ في الشفرة البرمجية جافا التالية لمقارنة سلسلتين نصيتين بشكل صحيح من أجل المساواة.
👍3
What is the output of the following code snippet?
int moon = 9, star = 2 + 2 * 3;
float sun = star>10 ? 1 : 3;
double jupiter = (sun + moon) -­ 1.0f;
int mars = -­-­moon <= 8 ? 2 : 3;
System.out.println(sun+", "+jupiter+", "+mars);
Which collection interface represents a group of objects as a single unit in Java?
Anonymous Quiz
51%
List
8%
Set
11%
Map
31%
Collection