Tag: web technology

Quizzes (208) Questions (4176)

Questions Related to web technology

Multiple choice technology web technology

Given: public static void before() { Set set = new TreeSet(); set.add("2"); set.add(3); set.add("1"); Iterator it = set.iterator(); while (it.hasNext()) System.out.print(it.next() + " "); } Which statements are true?

  1. The before() method will print 1 2

  2. The before() method will print 1 2 3

  3. The before() method will print three numbers, but the order cannot be determined

  4. The before() method will not compile

  5. The before() method will throw an exception at runtime
Reveal answer Fill a bubble to check yourself
E Correct answer
Full explanation
Multiple choice technology web technology

In the UML notation, parameterized (generic) classes are represented by

  1. the normal class representation with a dotted arrow pointing at the template parameter classes

  2. the normal class representation but shaded grey.

  3. the normal class representation with a dotted outline and the names of its parameter classes listed on the top right-hand corner.

  4. the normal class representation with a rectangular box in its top left-hand corner.

  5. Its a trick question - parameterized classes can't be specified in the UML notation.
Reveal answer Fill a bubble to check yourself
C Correct answer
Full explanation
Multiple choice technology web technology

Which of the following are true statements about the JavaServer Page life cycle? (Choose two.)

  1. The _jspService() method is called from the generated servlet's service() method.

  2. jspInit() is only ever called on the first request to a JSP instance.

  3. jspDestroy() is only ever called on the last request to a JSP instance.

  4. All servlet methods are accessible from the jspInit() method.

  5. You cannot override or provide a no-parameter init() method in a JSP page.
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Full explanation
Multiple choice technology web technology

What will be the result of pressing the submit button in the following HTML form? (Choose two.)

  1. A request is sent with the HTTP method HEAD.

  2. A request is sent with the HTTP method POST.

  3. A request is sent with the HTTP method GET.

  4. The parameter fullName is the only parameter passed to the web server in the request URL.

  5. The parameters fullName and sbmButton are passed to the web server in the request URL.

  6. The parameter fullName is the only parameter passed to the web server as part of the request body.
Reveal answer Fill a bubble to check yourself
C,F Correct answer
Full explanation
Multiple choice technology web technology

Which statements are true about comparing two instances of the same class, given that the equals() and hashCode() methods have been properly overridden? (Choose all that apply.)

  1. If the equals() method returns true, the hashCode() comparison == might return false

  2. If the equals() method returns false, the hashCode() comparison == might return true

  3. If the hashCode() comparison == returns true, the equals() method must return true

  4. If the hashCode() comparison == returns true, the equals() method might return true

  5. If the hashCode() comparison != returns true, the equals() method might return true
Reveal answer Fill a bubble to check yourself
B,D Correct answer
Full explanation
Multiple choice technology web technology

Given: import java.util.*; class MapEQ { public static void main(String[] args) { Map m = new HashMap(); ToDos t1 = new ToDos("Monday"); ToDos t2 = new ToDos("Monday"); ToDos t3 = new ToDos("Tuesday"); m.put(t1, "doLaundry"); m.put(t2, "payBills"); m.put(t3, "cleanAttic"); System.out.println(m.size()); } } class ToDos{ String day; ToDos(String d) { day = d; } public boolean equals(Object o) { return ((ToDos)o).day == this.day; } // public int hashCode() { return 9; } } Which is correct? (Choose all that apply.)

  1. As the code stands it will not compile

  2. As the code stands the output will be 2

  3. As the code stands the output will be 3

  4. If the hashCode() method is uncommented the output will be 2

  5. If the hashCode() method is uncommented the output will be 3

  6. If the hashCode() method is uncommented the code will not compile
Reveal answer Fill a bubble to check yourself
C,D Correct answer