Question 1     

A

Hash set



B

ConcurrentSkipListSet



C

LinkedHashSet



D

CopyOnWriteArraySet

Question 2     

A

Hashtable



B

CopyOnWriteMap



C

ConcurrentHash



D

ConcurrentMap

Question 3     

A

It’s a process in which two different processes run simultaneously



B

It’s a process in which two or more parts of same process run simultaneously



C

It’s a process in which many different processes are able to access same information



D

It’s a process in which a single process can access information from many sources

Question 4     

A

Process based



B

Thread based



C

Process and Thread based



D

None of the mentioned

Question 5     

A

Anyone will be executed first lexographically



B

Both of them will be executed simultaneously



C

None of them will be executed



D

It is dependent on the operating system

Question 6     

A

Extending Thread class



B

Implementing Runnable Interface



C

A&B



D

None

Question 7     

A

New



B

Runnable



C

Running



D

Terminated



E

All the above

Question 8     

A

True



B

False

Question 9     

A

Daemon Thread provides services to user threads



B

It has no role in life than to serve user threads



C

Its life depends on user threads



D

It is a low priority thread.



E

All the above

Question 10     

A

since it’s low propriety thread



B

there is no use of this thread



C

If there are no user threads, then JVM terminates automatically



D

User need to terminate.