Tag: technology

Quizzes (307) Questions (36705)

Questions Related to technology

Multiple choice technology programming languages

What is the output for the below code ? class A implements Runnable{ public void run(){ System.out.println(Thread.currentThread().getName()); } } public class Test { public static void main(String... args) { A a = new A(); Thread t = new Thread(a); Thread t1 = new Thread(a); t.setName("t"); t1.setName("t1"); t.setPriority(10); t1.setPriority(-3); t.start(); t1.start(); } }

  1. t t1

  2. t1 t

  3. t t

  4. Compilation succeed but Runtime Exception
Reveal answer Fill a bubble to check yourself
D Correct answer
Full explanation
Multiple choice technology programming languages

What is the output for the below code ? class A implements Runnable{ public void run(){ System.out.println(Thread.currentThread().getName()); } } 1. public class Test { 2. public static void main(String... args) { 3. A a = new A(); 4. Thread t = new Thread(a); 5. t.setName("good"); 6. t.start(); 7. } 8. }

  1. good

  2. null

  3. Compilation fails with an error at line 5

  4. Compilation succeed but Runtime Exception
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology programming languages

What is the output for the below code ? public class Test { public static void main(String[] args) { List list = new ArrayList(); list.add(0, 59); int total = list.get(0); System.out.println(total); } }

  1. 59

  2. Compile time error, because you have to do int total = ((Integer)(list.get(0))).intValue();

  3. Compile time error, because can't add primitive type in List.

  4. Compile Properly but Runtime Exception
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology programming languages

What is the output for the below code ? public class Outer { private int a = 7; class Inner { public void displayValue() { System.out.println("Value of a is " + a); } } } public class Test { public static void main(String... args) throws Exception { Outer mo = new Outer(); Outer.Inner inner = mo.new Inner(); inner.displayValue(); } }

  1. Value of a is 7

  2. Compile Error - not able to access private member.

  3. Runtime Exception

  4. Value of a is 8
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology programming languages

What is the output for the below code ? public class C { } public class D extends C{ } public class A { public C getOBJ(){ System.out.println("class A - return C"); return new C(); } } public class B extends A{ public D getOBJ(){ System.out.println("class B - return D"); return new D(); } } public class Test { public static void main(String... args) { A a = new B(); a.getOBJ(); } }

  1. Compile with error - Not allowed to override the return type of a method with a subtype of the original type.

  2. class A - return C

  3. class B - return D

  4. Runtime Exception
Reveal answer Fill a bubble to check yourself
C Correct answer
Full explanation