Tag: programming languages

Questions Related to programming languages

"WRITE MASTER-REC INVALID KEY GO TO PARA-ERROR. Indicate which of the following are not valid modes of opening the INDEXED file of which MASTER-REC is a record."
technology programming languages

  1. a and b

  2. a and c

  3. c and d

  4. a and d

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Correct Option: C

"What do you think the output of the following code snippet will be? 01 WS-NUM-TEST PIC +9(2).99. 01 WS-NUM-TEST2 PIC -9(2).99. MOVE 19.99 TO WS-NUM-TEST MOVE -9.99 TO WS-NUM-TEST2 IF WS-NUM-TEST > WS-NUM-TEST2 DISPLAY ""+VE GREATER THAN -VE"" ELSE DISPLAY ""+VE LESS THAN -VE"" END-IF "
technology programming languages

  1. +VE GREATER THAN -VE

  2. +VE LESS THAN -VE

  3. Compile error

  4. Edited Numeric field cannot be used for comparison.

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Correct Option: C

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. static

  3. native

  4. public

  5. private

  6. abstract

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Correct Option: A,B,D
Explanation:

Explanation: In Java, an interface can only have public abstract methods and public static final fields. Therefore, on line 12, we can have only public, static, and final keywords. The correct answer options are D) public.

Option A) final - This option is correct because final keyword can be used only with the variables and methods

Option B) static - This option is correct because static keyword can be used with an interface.

Option C) native - This option is incorrect because native keyword is not allowed.

Option D) public - This option is correct because public keyword can be used

Option E) private - This option is incorrect because private keyword is not allowed

Option F) abstract - This option is incorrect because abstract keyword is not allowed.

Therefore, the correct options are B) static, D) public, and A) final.

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. 3

  3. 1 2

  4. 2 3

  5. 1 2 3

  6. Compilation fails.

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Correct Option: D
  1. 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 instance gets garbage collected.

  2. The code on line 33 throws an exception.

  3. The code on line 35 throws an exception.

  4. The code on line 31 throws an exception.

  5. The code on line 33 executes successfully.

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Correct Option: B,C,E

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= (Delta)x;

  3. Foo f= (Alpha)x;

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

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Correct Option: B

What will be the output of the below code snippet? public class Quiz1{ public static void main(String args[]) { System.out.print("H" + "a"); System.out.print('H' + 'a'); } }
technology programming languages

  1. HaHa

  2. Ha169

  3. Ha Ha

  4. 169Ha

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Correct Option: B

What will be the output of the below code snippet? public class Quiz2 { public static void main(String args[]) { String letters = "ABC"; char[] numbers = { '1', '2', '3' }; System.out.println(letters + " easy as " + numbers); } }
technology programming languages

  1. ABC easy as [C@3e25a5

  2. ABC easy as 123

  3. ABC easy as 1 2 3

  4. ABC easy as 1,2,3

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Correct Option: A

What will be the output of the below code snippet? public class Quiz3 { public static void main(String args[]) { final String pig = "length: 10"; final String dog = "length: " + pig.length(); System.out.println("Animals are equal: " + pig == dog); } }
technology programming languages

  1. True

  2. False

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Correct Option: B