Tag: technology

Quizzes (307) Questions (36705)

Questions Related to technology

Multiple choice technology

Given: 84. try { 85. ResourceConnection con = resourceFactory.getConnection(); 86. Results r = con.query("GET INFO FROM CUSTOMER"); 87. info = r.getData(); 88. con.close(); 89. } catch (ResourceException re) { 90. errorLog.write(re.getMessage()); 91. } 92. return info; Which statement is true if a ResourceException is thrown on line 86?

  1. Line 92 will not execute.

  2. The connection will not be retrieved in line 85.

  3. The resource connection will not be closed on line 88.

  4. The enclosing method will throw an exception to its caller
Reveal answer Fill a bubble to check yourself
C Correct answer
Full explanation
Multiple choice technology

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.)

  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.
Reveal answer Fill a bubble to check yourself
B,C,E Correct answer
Full explanation
Multiple choice technology

Given: 11. class A { 12. public void process() { System.out.print("A,"); } 13. class B extends A { 14. public void process() throws IOException { 15. super.process(); 16. System.out.print("B,"); 17. throw new IOException(); 18. } 19. public static void main(String[] args) { 20. try { new B().process(); } 21. catch (IOException e) { System.out.println("Exception"); }} What is the result?

  1. Exception

  2. A,B,Exception

  3. Compilation fails because of an error in line 20.

  4. Compilation fails because of an error in line 14.

  5. A NullPointerException is thrown at runtime
Reveal answer Fill a bubble to check yourself
D Correct answer
Full explanation
Multiple choice technology

Given a method that must ensure that its parameter is not null: 11. public void someMethod(Object value) { 12. // check for null value ... 20. System.out.println(value.getClass()); 21. } What, inserted at line 12, is the appropriate way to handle a null value?

  1. assert value == null;

  2. assert value != null, "value is null";

  3. if (value == null) {throw new AssertionException("value is null");}

  4. if (value == null) {throw new IllegalArgumentException("value is null");}
Reveal answer Fill a bubble to check yourself
D Correct answer
Full explanation
Multiple choice technology

Given: 11. static void test() throws Error { 12. if (true) throw new AssertionError(); 13. System.out.print("test "); 14. } 15. public static void main(String[] args) { 16. try { test(); } 17. catch (Exception ex) { System.out.print("exception "); } 18. System.out.print("end "); 19. } What is the result?

  1. end

  2. compilation fails

  3. exception end

  4. exception test end

  5. A Throwable is thrown by main.

  6. An Exception is thrown by main.
Reveal answer Fill a bubble to check yourself
E Correct answer
Full explanation
Multiple choice technology

Given: 11. Float pi = new Float(3.14f); 12. if (pi > 3) { 13. System.out.print("pi is bigger than 3. "); 14. } 15. else { 16. System.out.print("pi is not bigger than 3. "); 17. } 18. finally { 19. System.out.println("Have a nice day."); 20. } What is the result?

  1. compilation fails

  2. pi is bigger than 3

  3. An Exception occurs at runtime

  4. pi is bigger than 3. Have a nice day

  5. pi is not bigger than 3. Have a nice day
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology

Given: 11. public class Yikes { 12. 13. public static void go(Long n) {System.out.println("Long ");} 14. public static void go(Short n) {System.out.println("Short ");} 15. public static void go(int n) {System.out.println("int ");} 16. public static void main(String [] args) { 17. short y = 6; 18. long z = 7; 19. go(y); 20. go(z); 21. } 22. } What is the result?

  1. int Long

  2. Short Long

  3. Compilation fails

  4. An Exception thrown at runtime
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology

Given: 12. NumberFormat nf = NumberFormat.getInstance(); 13. nf.setMaximumFractionDigits(4); 14. nf.setMinimumFractionDigits(2); 15. String a = nf.format(3.1415926); 16. String b = nf.format(2); Which two statements are true about the result if the default locale is Locale.US? (Choose two.)

  1. The value of b is 2.

  2. The value of a is 3.14.

  3. The value of b is 2.00.

  4. The value of a is 3.141

  5. The value of a is 3.1416

  6. The value of b is 2.0000
Reveal answer Fill a bubble to check yourself
C,E Correct answer
Full explanation