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User level threads are threads that are visible to the programmer and are unknown to the kernel. The operating system kernel supports and manages kernel level threads. Three different types of models relate user and kernel level threads. Which of the following statements is/are true ? (a) (i) The Many - to - one model maps many user threads to one kernel thread (ii) The one - to - one model maps one user thread to one kernel thread (iii) The many - to - many model maps many user threads to smaller or equal kernel threads (b) (i) Many - to - one model maps many kernel threads to one user thread (ii) One - to - one model maps one kernel thread to one user thread (iii) Many - to- many model maps many kernel threads to smaller or equal user threads
Steps are given to draw an ellipse by loop of the thread method. Arrange the steps. i. Check whether the length of the thread is enough to touch the end of minor axis. ii. Draw two axes AB and CD intersecting at O. Locate the foci F1 and F2. iii. Move the pencil around the foci, maintaining an even tension in the thread throughout and obtain the ellipse. iv. Insert a pin at each focus-point and tie a piece of thread in the form of a loop around the pins.
Consider the following multi-threaded code segment (in a mix of C and pseudocode), invoked by two processes P1 and P2, and each of the processes spawns two threads T1 and T2: int x = 0; // global Lock L1; // global main() { create a thread to execute foo(); // Thread T1 create a thread to execute foo(); // Thread T2 wait for the two threads to finish execution; print (x);} foo() { int y = 0; Acquire L1; x = x + 1; y = y + 1; Release L1; print (y); } Which of the following statement(s) is/are correct ?
Ram is playing with a thread and a brick of mass 2 Kg. He tied a thread one of its end with brick and another end with the roof. He holds the thread at 1 m below the roof and applying a force of 50 N. What is the tension that appeared in the upper part of the thread which is stick with the roof? Take (Tan 68° = 2.5; Cos 68° = 0.37; g = 10m/s2)
Consider the following statements regarding the Parliament : a. The provision for the Calling Attention Notices was first made in the year 1954. b. Notices of Calling Attention have to be given by members in writing by 10.00 am. c. A member can give not more than one Calling Attention Notice for any one sitting. Which of the above statements is not correct?
What is the output for the below code?
class A implements Runnable{ public void run(){ System.out.println(Thread.currentThread().getName()); }}public class Test{ public static void main(String... args){ A a = new A(); Thread t = new Thread(a); t.setName("good"); t.start(); }}
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?
Consider three software items: Program-X, Control Flow Diagram of Program-Y and Control Flow Diagram of Program-Z as shown below Program-X: Control Flow Diagram of Program-Y sumcal (int maxint, int value) {       int result=0, i=0;       if (value <0)       {           Value = -value;       }       while ( (i
What will happen after compiling and running following code?
class A implements Runnable{ public void run(){ System.out.println("run-a"); }}public class Test{ public static void main(String... args){ A a = new A(); Thread t = new Thread(a); t.start(); t.start(); }}
When a class extends the Thread class ,it should override ............ method of Thread class to start that thread.