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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
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)
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.
In a case the State wants to apply for cancellation of bail on an accused. As per the decision of the Supreme Court of India in the case of State (Delhi Administration) v. Sanjay Gandhi, which one of the following may be the appropriate ground for seeking cancellation of bail of the accused?
When a class extends the Thread class ,it should override ............ method of Thread class to start that thread.
Which of the following threads is used for transmission of power? I. Square thread II. Buttress thread III. Acme thread Choose the correct answer from the options given below
Threads are classified into V thread, Acme thread, Knuckle thread, etc. on the basis of _________
Which of the following statement is true for screw threads? Statement 1: Flank angle of symmetrical thread is known as thread’s half-angle. Statement 2: It is measured parallel to the axis of a thread.
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(); }}