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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
In context of Java Threads, which of the following statements are true? I: sleep () and yield () are static methods in thread class II: yield () voluntarily relinquishes CPU to other threads. III: Daemon will terminate when all non-Daemon threads terminate.
In the question below, a passage is given followed by three courses of actions numbered I, II and III. On the basis of the information given, you have to assume everything in the statement to be true, and then decide which of the following suggested courses of actions logically follow(s) for pursuing. Passage: COVID-19 has adversely affected Cinema Halls. Not just the fact that they are still in lockdown, but also because OTT platforms like Disney-Hotstar and Amazon prime are wooing desperate producers to directly release their films in OTT platforms. Despite repeated requests, producers are not heeding to the calls of Cinema Halls not to release on OTT platforms. Many cinema halls and multiplexes are staring at mammoth losses. Courses of action: I. The Cinema halls should be demolished and converted to multi-storey residential buildings. II. Multiplexes and Cinema halls must come together and ban the films that are releasing on OTT platforms from theatrical release. III. The Government must ban all films from direct release on OTT platforms.
The following program consists of 3 concurrent processes and 3 binary semaphores. The semaphores are initialized as S0=1, S1=0, S2=0. Process P0 Process P1 Process P2 While (true) { Wait (S0); Print ‘0’ Release (S1); Release (S2); } Wait (S1); Release (S0); Wait (S2); Release (S0);   How many times will process P0 print ‘0’? 
Three statements are given, followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusion logically follow(s) from the statements. Statements: All threads are needles. Some needles are brushes. All needles are cupboards. Conclusions: I. Some brushes are cupboards. II. All threads are cupboards. III. All brushes are threads.
Statements : All needles are threads. All threads are boxes. All trees are boxes.

Conclusions :
I. No needle is tree.
II. Some trees are threads.
III. Some boxes are needles.
IV. Some trees are needles.
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 ?
Consider the following threads, T1, T2, and T3 executing on a single processor, synchronized using three binary semaphore variables, S1, S2, and S3, operated upon using standard wait() and signal(). The threads can be context switched in any order and at any time. T1 T2 T3 While(true) { Wait(S3); Print(“C”); Signal (S2); } While(true) { Wait(S1); Print(“B”); Signal (S3); } While(true) { Wait(S2); Print(“A”); Signal (S1); }   Which initialization of the semaphores would print the sequence BCABCABCA….?
One X wrote defamatory letter against Y, a copy of which he sent to the Chairman of the Municipal Committee and other for publication in a local newspaper in which it was duly published. Y sued X and the editor, publisher and management of the newspaper for damages. Subsequently, a sum of Rs. 5,000 was paid by the newspaper by way of damages to Y and an apology was also published in the newspaper. Thereupon Y withdrew his action against the newspaper but not against X. X pleads that the release of other joint tort-feasors amounted to his release also
Which of the following are methods of calculating goodwill?
1. Average profit method
2. Super profit method
3. Log method
4. Sum of years digit method
5. Capitalisation of average profit method
6. Capitalisation of super profit method
7. FIFO method
Select the correct answer: