Android Programming (2180715) MCQs

MCQs of Background Tasks

Showing 21 to 30 out of 32 Questions
1 2 3 4
21.
By using AsyncTask, do we need to add any custom handler to publish the result to UI thread?
(a) Yes
(b) No
Answer:

Option (b)

22.
Can we create an instance of the AsyncTask class directly?
(a) Yes
(b) No
Answer:

Option (a)

23.
What method must be overridden for using AsyncTask?
(a) doInBackground
(b) onProgressUpdate
(c) onPostExecute
(d) All of the above
Answer:

Option (a)

24.
Can we create an instance of AsyncTask from a service's process?
(a) Yes
(b) No
Answer:

Option (a)

25.
How many time can a task run?
(a) Just one
(b) Multiple times
(c) Infinite
(d) Zero times
Answer:

Option (a)

26.
What will happen if a task is executed the second time?
(a) An exception will be thrown
(b) The task will be run as normal from the beginning
(c) The execution will be ignored
Answer:

Option (a)

27.
In order to access member fields in doInbackground method where should we set them?
(a) In constructor
(b) In onPreExecute
(c) On onProgressUpdate
(d) A&B
Answer:

Option (d)

28.
In a JSON file, a _____ bracket represents a JSON array.
(a) [
(b) {
(c) (
(d) <
Answer:

Option (a)

29.
In a JSON file, _____ bracket represents a JSON object.
(a) [
(b) {
(c) (
(d) <
Answer:

Option (b)

30.
Classes to manipulate JSON data are
(a) JSONArray
(b) JSONObject
(c) JSONStringer
(d) All of the above
Answer:

Option (d)

Showing 21 to 30 out of 32 Questions
1 2 3 4