Tag: programming languages

Questions Related to programming languages

Which of the following is NOT a value type?
technology programming languages

  1. Struct

  2. Delegate

  3. string

  4. Enumeration

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Correct Option: C

Which of the following are true about Constructors?
technology programming languages

  1. Member Function

  2. Same name as Class name

  3. Default constructor initializes all non-initialized fields and variables to zero.

  4. Compiler adds an empty constructor, if we do not write our own constructor

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Correct Option: A,B,C,D

Which is true about applet?
technology programming languages

  1. Applet version has main method

  2. GUI components are added explicitly to the Applet

  3. Aplet class is declared private

  4. None of the above

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Correct Option: D

JFC Stands for
technology programming languages

  1. Java Foundation Course

  2. Java Fundamental Classes

  3. Java Foundation Classes

  4. None of the above

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Correct Option: C

Java APIs are libraries of compiled code?
technology programming languages

  1. True

  2. False

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Correct Option: A

Given: 11. public interface Status { 12. /* insert code here */ int MY_VALUE = 10; 13. } Which three are valid on line 12? (Choose three.)
technology programming languages

  1. final

  2. public

  3. native

  4. static

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Correct Option: A,B,D

Given: 10. public class Bar { 11.static void foo(int...x) { 12. // insert code here 13. } 14. } Which two code fragments, inserted independently at line 12, will allow the class to compile? (Choose two.)
technology programming languages

  1. foreach(x) System.out.println(z);

  2. for(int z : x) System.out.println(z);

  3. while( x.hasNext()) System.out.println( x.next());

  4. for( int i=0; i< x.length; i++ ) System.out.println(x[i]);

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Correct Option: B,D

Given: 11. public class Test { 12. public static void main(String [] args) { 13. int x =5; 14. boolean b1 = true; 15. boolean b2 = false; 16. 17.if((x==4) && !b2) 18. System.out.print(”l “); 19. System.out.print(”2 “); 20. if ((b2 = true) && b1) 21. System.out.print(”3 “); 22. } 23. } What is the result?
technology programming languages

  1. 2

  2. 2 3

  3. Compilation fails.

  4. 1 2 3

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Correct Option: B

Given: 31. // some code here 32. try { 33. // some code here 34. } catch (SomeException se) { 35. // some code here 36. } finally { 37. // some code here 38. } Under which three circumstances will the code on line 37 be executed? (Choose three.)
technology programming languages

  1. The code on line 31 throws an exception

  2. The code on line 33 throws an exception

  3. The code on line 35 throws an exception

  4. The code on line 33 executes successfully

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Correct Option: B,C,D

Given: 10. interface Foo {} 11. class Alpha implements Foo { } 12. class Beta extends Alpha {} 13. class Delta extends Beta { 14. public static void main( String[] args) { 15. Beta x = new Beta(); 16. // insert code here 17. } 18. } Which code, inserted at line 16, will cause a java.lang.ClassCastException?
technology programming languages

  1. Alpha a = x;

  2. Foo f= (Alpha)x;

  3. Foo f= (Delta)x;

  4. Beta b = (Beta)(Alpha)x;

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Correct Option: C