JAVA interview question set 3

Which of these method is used to begin the execution of a thread?

1 Mark(s)

run()
start()
runThread()
startThread()

Which of these method wakes up all the threads?

1 Mark(s)

wakeAll()
notify()
start()
notifyAll()

What should not be done to avoid deadlock?

1 Mark(s)

Avoid using multiple threads
Avoid hold several locks at once
Execute foreign code while holding a lock
Use interruptible locks

What is true about time slicing?

1 Mark(s)

Time slicing is OS service that allocates CPU time to available runnable thread
Time slicing is the process to divide the available CPU time to available runnable thread
Time slicing depends on its implementation in OS
Time slicing allocates more resources to thread

Which of these method is used to tell the calling thread to give up a monitor and go to sleep until some other thread enters the same monitor?

1 Mark(s)

wait()
notify()
notifyAll()
sleep()

Thread priority in Java is?

1 Mark(s)

Integer
Float
Double
Long

What is multithreaded programming?

1 Mark(s)

It’s a process in which two different processes run simultaneously
It’s a process in which two or more parts of same process run simultaneously
It’s a process in which many different process are able to access same information
It’s a process in which a single process can access information from many sources

Which function of pre defined class Thread is used to check weather current thread being checked is still running?

1 Mark(s)

isAlive()
Join()
isRunning()
Alive()

What does AWT stands for?

1 Mark(s)

All Window Tools
All Writing Tools
Abstract Window Toolkit
Abstract Writing Toolkit

Deadlock is a situation when thread is waiting for other thread to release acquired object.

1 Mark(s)

TRUE
FALSE

Which of these method of Thread class is used to Suspend a thread for a period of time?

1 Mark(s)

sleep()
terminate()
suspend()
stop()

Which of these are types of multitasking?

1 Mark(s)

Process based
Thread based
Process and Thread based
None of the mentioned

What requires less resources?

1 Mark(s)

Thread
Process
Thread and Process
Neither Thread nor Process

Which of these method is used to explicitly set the priority of a thread?

1 Mark(s)

set()
make()
setPriority()
makePriority()

Which of these method is used to implement Runnable interface?

1 Mark(s)

stop()
run()
runThread()
stopThread()

Which of the following stops execution of a thread?

1 Mark(s)

Calling SetPriority() method on a Thread object
Calling notify() method on an object
Calling wait() method on an object
Calling read() method on an InputStream object

What is synchronization in reference to a thread?

1 Mark(s)

It’s a process of handling situations when two or more threads need access to a shared resource
It’s a process by which many thread are able to access same shared resource simultaneously
It’s a process by which a method is able to access many different threads simultaneously
It’s a method that allow too many threads to access any information the require

Which of these method of Thread class is used to find out the priority given to a thread?

1 Mark(s)

get()
ThreadPriority()
getPriority()
getThreadPriority()

What does not prevent JVM from terminating?

1 Mark(s)

Process
Daemon Thread
User Thread
JVM Thread

Which of the following will ensure the thread will be in running state?

1 Mark(s)

yield()
notify()
wait()
Thread.killThread()

What is true about threading?

1 Mark(s)

run() method calls start() method and runs the code
run() method creates new thread
run() method can be called directly without start() method being called
start() method creates new thread and calls code written in run() method

Which of this method is used to avoid polling in Java?

1 Mark(s)

wait()
notify()
notifyAll()
all of the mentioned

Which of these keywords are used to implement synchronization?

1 Mark(s)

synchronize
syn
sync
synchronized

Which of these statement is incorrect?

1 Mark(s)

A thread can be formed by implementing Runnable interface only
A thread can be formed by a class that extends Thread class
start() method is used to begin execution of the thread
run() method is used to begin execution of a thread before start() method in special cases

What is synchronization in reference to a thread?

1 Mark(s)

It’s a process of handling situations when two or more threads need access to a shared resource
It’s a process by which many thread are able to access same shared resource simultaneously
It’s a process by which a method is able to access many different threads simultaneously
It’s a method that allow too many threads to access any information require

What decides thread priority?

1 Mark(s)

Process
Process scheduler
Thread
Thread scheduler

Which of these statements is incorrect?

1 Mark(s)

By multithreading CPU idle time is minimized, and we can take maximum use of it
By multitasking CPU idle time is minimized, and we can take maximum use of it
Two thread in Java can have the same priority
A thread can exist only in two states, running and blocked

Which of the following is a correct constructor for thread?

1 Mark(s)

Thread(Runnable a, String str)
Thread(int priority)
Thread(Runnable a, int priority)
Thread(Runnable a, int priority)

What will happen if two thread of the same priority are called to be processed simultaneously?

1 Mark(s)

Anyone will be executed first lexographically
Both of them will be executed simultaneously
None of them will be executed
It is dependent on the operating system

Which of these method wakes up the first thread that called wait()?

1 Mark(s)

wake()
notify()
start()
notifyAll()

JAVA interview question set 3 : Question 1 of 30