Answer the following statements true (T) or false (F)
1. JavaFX components are thread safe.
2. (Advanced) Declaring a method synchronized guarantees that deadlock cannot occur.
3.(Advanced) Once a ReentrantLock has been obtained by a thread, the ReentrantLock
object will not allow another thread to obtain the lock until the first thread releases it.
1. False. JavaFX components are not thread safe. All interactions with JavaFX controls should be performed in the JavaFX application thread.
2. False. Deadlocks can occur if the lock on an object is never released
3. True
You might also like to view...
For each of the sequences w =< e1e2 ...ei ...ei+1 ...elast > given be- low, determine whether they are subsequences of the sequence < {1, 2, 3}{2, 4}{2, 4, 5}{3, 5}{6} >
subjected to the following timing constraints:
mingap = 0 (interval between last event in ei and first event
in ei+1 is > 0)
maxgap = 3 (interval between first event in ei and last event
in ei+1 is ? 3)
maxspan = 5 (interval between first event in e1 and last event
in elast is ? 5)
ws = 1 (time between first and last events in ei is ? 1)
• w =< {1}{2}{3} >
• w =< {1, 2, 3, 4}{5, 6} >
• w =< {2, 4}{2, 4}{6} >
• w =< {1}{2, 4}{6} >
• w =< {1, 2}{3, 4}{5, 6} >
The intersection of a row and column in a DataGridView control is called a cell.
Answer the following statement true (T) or false (F)
Which of the following statements is false?
a. The following code deletes all of the list’s elements: del numbers[:] b. The del statement can delete any variable. c. The following code deletes the variable numbers from the interactive session, then attempt to display the variable’s value, causing a NameError: del numbers d. After deleting numbers from the interactive session, attempting to display it displays an empty list.
What packet-switching standard designed for and used primarily with T-carrier lines is very fast, but does not guarantee data integrity?
A. ATM B. Frame Relay C. TCP/IP D. Multi-Protocol Label Switching (MPLS)