Java Concurrency and Session Management

Question 1

Question

Concurrency in Java. Which is not a state of a thread?

Answer

Dead
Sleeping
Pause
Running
Resumed

Question 2

Question

"Determines if the thread is running or not". This statement is describing:

Answer

IsAlive()
Stop()
isDaemon()
run()
start()

Question 3

Question

In Java, the following methods are vulnerable to race condition:

Answer

start(), stop(), init(), wait(), pause()
start(), stop(), time(), init(), destroy()
notifiyAll(), notify() syncronized, java.lang.thread
stop(), isDaemon(), getThreadGroup()
none of the above

Question 4

Question

Which of the following statements is for the use of ThreadPool instead of ThreadGroup?

Answer

Using few methods of the threadgroup class is not considered thread-safe
Newly created thread may lead to peromance overhead
Controlling too may threads is not easy and might result in errors in the memory
A thread pool is a set of work queue of runnables and running thread connections
None of the above

Question 5

Question

When an object is built and then occurs: the race condition, improper initialization and leaks, it is because:

Answer

if "terminated" reference is not used
if "exception handler" is not used
if "this" reference is used
if "terminated" reference is used
if "this" reference is not used

Question 6

Question

Which statement is not a prevention technique DeadLock?

Answer

DeadLock detection
Lock Timeout
Ordering of Locks
Deadlock mutable
None of the above

Question 7

Question

Which of the following is not a safe practice for handling threads?

Answer

Use join() method
Setting priorities for threads
Ordering of Locks
Avoid publishing "this" reference during construction
Document the order

Question 8

Question

Check the statement that is not a type of session hijacking attack:

Answer

User enumeration
Stealing Session ID through HTTP Get request
Attack using Client-Side Scripting
Session Fixation
Attack through HTTP Header response

Question 9

Question

Indicate which are the guidelines for Secured sessions Management :

Answer

Password Strength
Password Storage
Password Use
Browser Caching
All of the above

Question 10

Question

"Date formats in java are not synchronized". This feature belongs to:

Answer

Race condition prevention
DateFormat in multi-threaded environment
Use join() method
Document the order
Setting priorities for threads

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Java Concurrency and Session Management

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	Created by Carlos Veliz over 9 years ago