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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
Between 10 pm to 6 am, a fitness band records the following data of an user’s sleep. Refer the below data table and answer the following Question.   Deep Sleep   15%   Dreaming   20%   Light sleep   10%   Extremely light sleep   15%   Awake   40%   How long was the user in Light sleep or was Awake?
Consider the following sentences: (i) I woke up from sleep. (ii) I woked up from sleep. (iii) I was woken up from sleep. (iv) I was wokened up from sleep. Which of the above sentences are grammatically CORRECT?
Consider the following sentences: (i) I woke up from sleep (ii) I woked up from sleep (iii) I was woken up from sleep (iv) I was wakened up from sleep Which of the above sentences are grammatically CORRECT?
Our body needs sleep, just like it needs air and food to function at its best. During sleep, our body heals itself and restores its chemical balance. Without enough sleep, one's brain and body systems wont function normally. It can also dramatically lower ones quality of life. A study was made that by sleeping for less than 6 to 8 hours a night increases the risk of early death by 12%.  There are many effects because of sleep deprivation. Which of the following, if true, would weaken the conclusion about the effects of this? 
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.
Four statements are given followed by four conclusions. Mark which of the given conclusion(s) definitely follows from the given statements even if they seem to be at variance from commonly known facts. Statements: 1. Some cats bark. 2. Those who bark do not sleep. 3. All elephants sleep. 4. No cat is elephant. Conclusions: I) Some cats do not sleep. II) Some elephants bark. III) The cats that bark are elephants. IV) Elephants that do not bark are cats.
In the question below is a statement followed by two conclusions numbered I and II. You have to assume everything in the statement to be true, then consider the two conclusions together and decide which of them logically follows beyond a reasonable doubt from the information given in the statement: Statement: People who sleep late tends to suffer from hypertension at young age. Conclusions: I. People who sleep on time will not suffer from hypertension. II. Old people who sleep late will not suffer from hypertension.