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What is the purpose of the design pattern
Bridge
?
Conversion from one interface to another
Decouple abstraction from implementation to be able to use them independently
To route requests from object-sender to object-reciever
To control access to another object
Explanation
Pattern
Bridge
is used when it is necessary to avoid a strong coupling between abstraction and implementation. Usually, in this case, both abstractions and implementations must be extended by new sub-classes.
patterns
Bridge
1
(1)
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Which design pattern is represented by the following code? List<String> strings = Arrays.asList("hello, ", "world", "!");
Which statements about the following code are correct ? (in some application): public class Singleton { private static Singleton singleton; public static Singleton getInstance() { if (singleton == null) { singleton = new Singleton(); } return singleton; } }
Using of which design pattern is demonstrated by the following code: FileInputStream in = new FileInputStream("test.dat"); BufferedInputStream bin = new BufferedInputStream(in);
What is the main difference between design patterns Decorator and Proxy.
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What will be printed out as a result of the following code execution / compilation? class A { public A() { System.out.print("A"); } } class B { public B() { System.out.print("B"); } } class C { public C() { System.out.print("C"); } } public class D extends C { private A objA = new A(); private static B objB = new B(); public D() { System.out.print("D"); } public static void main(String[] args){ new D(); } }
What will be printed out as a result of the following code execution / compilation? public class Test { private String name; Test(String name) { this.name = name; } public void test(final Test test) { test = new Test("three"); } public String toString() { return name; } public static void main(String[] args) { Test t1 = new Test("one"); Test t2 = new Test("two"); t1.test(t2); System.out.println(t2); } }
What will be printed out as a result of the following code execution / compilation? public class Test { static void m(int ... a) { System.out.println("1"); } static void m(Integer ... a) { System.out.println("2"); } public static void main(String[] args) { m(1, 2); } }
What will be printed out as a result of the following code execution / compilation? public class Test { public static void main(String[] args) { ElectricInverter inverter = new ElectricInverter(); int AC = 220; System.out.println(inverter.invert(AC)); } } class ElectricInverter { public static final int AC = ~220; public static final int DC = -110; public static final int GROUND = 0; int invert(int type) { if (type == AC) { return DC; } else if (type == DC) { return AC; } return GROUND; } }
int i = Integer.MAX_VALUE + 10; What is the result of the given line execution?
What happens after the following code is compiled and run: 01: interface TheInterface { 02: void print(); 03: } 04: 05: class TheClass implements TheInterface { 06: public void print() { 07: System.out.println("TheClass"); 08: } 09: } 10: 11: public class ClassConversion { 12: public static void main(String[] args) { 13: TheClass c = new TheClass(); 14: TheInterface i = c; 15: i.print(); 16: } 17: }
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