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How can you prevent multiple threads from accessing a critical section of code simultaneously in Java?

How can you prevent multiple threads from accessing a critical section of code simultaneously in Java? Correct Answer By using synchronized blocks or methods

Related Questions

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 statements:
1. Section 34 of Indian Penal Code requires two persons whereas Section 149 of Indian Penal Code require five persons.
2. Section 34 of Indian Penal Code requires common intention, whereas Section 149 of Indian Penal Code requires common object
3. Section 34 of Indian Penal Code and Section 149 of Indian Penal Code both require presence of a prior consent
4. Section 34 of Indian Penal Code and section 149 of Indian Penal Code. Both create specific offence
Which of the above statements are correct?
Carefully read following statements:
1. According to Section 34 of Indian Penal Code, requirement is of two persons, whereas under Section 149 of Indian Penal Code, requirement is of five persons.
2. According to Section 34 of Indian Penal Code, common intention is required whereas under Section 149 Indian Penal Code, common object is required
3. Previous consent is required under Section 34 & 149 of Indian Penal Code
4. Section 34 of Indian Penal Code and Section 149 of Indian Penal Code constitutes a specific offence
Which of the above statements is true:
A group of 74 students of Class XI went on picnic. The number of students who went on picnic by each section is as follows: Section A = 15 Section B = 24 Section C = 15 Section D = 20 5 students from Section A spent as much as 4 students from Section B. 12 Section B students spent as much as 9 Section C students and 6 Section C students spent as much as 8 Section D student. If every student of a particular section spent the same amount and all the students spent Rs. 23,370 altogether, find the amount spent by each student of Section D?
Two processes X and Y need to access a critical section. Consider the following synchronization construct used by both the processes Process ? /* other code for process ? */ while(true) { varP = true; while(varQ == true) { /* Critical Section */ varP = false; } } /* other code for process ?? */   Process ? /* other code for process ? */ while(true) { varQ = true; while(varP == true) { /* Critical Section */ varQ = false; } } /* other code for process ? */   Here, varP and varQ are shared variables and both are initialized to false. Which one of the following statements is true?
Consider the methods used by processes P1 and P2 for accessing their critical sections whenever needed, as given below. The initial values of shared boolean variables S1 and S2 are randomly assigned. Method used by PI Method used by P2 While (S1 == S2); Critical Section S1 = S2; While (S1 != S2); Critical Section S2 = not (S1);   Which one of the following statements describes the properties achieved?
You have configured a Group Policy Object (GPO) for the marketing oranization unit (OU) to prevent users from accessing My Network Places and from running System in Control Panel. You want the Managers Domain Local Group to be able to access My Network Places, but you still want to prevent them from running System in Control Panel. What should you do?
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.
Which of the following command options are displayed when you use the Router# show frame-relay ? command?
1. dlci
2. neighbors
3. lmi
4. pvc
5. map
Last year, there were three sections in a competitive exam. Out of them 33 students cleared the cut-off in Section A, 34 students cleared the cut-off in Section B and 32 students cleared the cut-off in Section C. 10 students cleared the cut-off in section A and section B, 9 cleared the cut-off in section B and section C and 8 cleared the cut-off in section A and section C. The number of students who cleared only one section was equal and was 21 for each section. How many students cleared all the three sections?