Java Concurrency and Session Management

Carlos Veliz
Quiz by Carlos Veliz, updated more than 1 year ago
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Java Concurrency and Session Management
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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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