Operating Systems and Task Management Quiz

The dispatcher handles incoming HTTP requests and decides which worker node should handle the request.

Round Robin, Least Connections, and Hashing are three strategies employed by scheduling algorithms.

The health check manager monitors the health of worker nodes and triggers reassignment of tasks if a node fails.

<p>Hashing ensures that data from a specific source is always processed by the same node.</p> Signup and view all the answers

<p>The Load Analyzer tracks metrics such as CPU usage, memory usage, response time, and network latency which can inform scheduling decisions.</p> Signup and view all the answers

<p>The Session State Manager ensures a user's session data is consistently handled, even if requests are processed by different nodes.</p> Signup and view all the answers

<p>The health check manager sends periodic pings; if a response isn't received within a set timeout, the node is considered down.</p> Signup and view all the answers

<p>Session persistence is important in scenarios like e-commerce to ensure user's shopping cart persists through their session.</p> Signup and view all the answers

<p>The primary purpose is to store the mapping between virtual addresses and their corresponding physical memory addresses.</p> Signup and view all the answers

<p>Page table entries also hold data about access permissions like read, write, execute and status information such as modified or referenced flags.</p> Signup and view all the answers

<p>The TLB is a cache that stores recent translations of virtual to physical memory addresses, speeding up memory access by avoiding full page table lookups.</p> Signup and view all the answers

<p>A page fault occurs. The OS loads the required page from disk into physical memory by using the page table.</p> Signup and view all the answers

<p>Page replacement algorithms determine which pages to remove from physical memory to make space for newly loaded pages.</p> Signup and view all the answers

<p>LRU algorithm replaces pages that haven't been accessed for the longest period of time.</p> Signup and view all the answers

<p>FIFO algorithm replaces the oldest loaded page in physical memory.</p> Signup and view all the answers

<p>The optimal algorithm requires knowledge of future memory access, which is impossible to know in practice.</p> Signup and view all the answers

<p>To allow all processes to advance their execution in a fair manner, ensuring all get CPU time without long waits.</p> Signup and view all the answers

<p>A mutex lock is acquired before writing, preventing other processes from writing to the log until the mutex is released. This ensures exclusive access to the shared resource while it is being written to.</p> Signup and view all the answers

<p>A semaphore is initialized to the maximum number of allowed connections. Each time a connection is taken, the semaphore is decremented and when the connection is released, it is incremented.</p> Signup and view all the answers

<p>Multiple clients can read the data concurrently. Updates can only happen when there are no readers, ensuring data integrity during write operations.</p> Signup and view all the answers

<p>The JVM acts as an abstraction layer between the Java program and the underlying hardware and operating system, allowing code to run on any platform without being recompiled.</p> Signup and view all the answers

<p>Java programs are compiled into platform-independent bytecode, which the JVM interprets and executes on the host machine.</p> Signup and view all the answers

<p>A client-server application where a data structure is read frequently but updated infrequently.</p> Signup and view all the answers

<p>Java programs are compiled into bytecode, which is interpreted and executed by the JVM, allowing the same bytecode to run on any platform with a JVM.</p> Signup and view all the answers

<p>To reduce the delay between a request and the first response.</p> Signup and view all the answers

<p>To prevent starvation, ensuring all processes get equitable CPU time.</p> Signup and view all the answers

<p>Processes often have strict execution deadlines that must be met.</p> Signup and view all the answers

<p>It's a fixed unit of time a process is allowed to execute before being preempted.</p> Signup and view all the answers

<p>Each job receives a fair amount of CPU time.</p> Signup and view all the answers

<p>It can result in decreased CPU output due to excessive context switching.</p> Signup and view all the answers

<p>Procedures cannot have priorities established.</p> Signup and view all the answers

<p>It can significantly impact the overall performance of the system.</p> Signup and view all the answers

<p>Java's granular security model and support for SSL/TLS are strong security features for middleware.</p> Signup and view all the answers

<p>MPI provides a standard for portable message-passing, enabling communication and coordination among parallel processes.</p> Signup and view all the answers

<p>MPI supports point-to-point and collective communication.</p> Signup and view all the answers

<p>MPI is designed to be portable through its standardized library routines and semantics in C, C++, and Fortran.</p> Signup and view all the answers

<p>Collective communication enables efficient data transfer and coordination among a group of processes.</p> Signup and view all the answers

<p>MPI is designed for performance scaling on both large supercomputers and smaller clusters.</p> Signup and view all the answers

<p>MPI allows you to write parallel code that divides tasks among processes running on different cluster nodes.</p> Signup and view all the answers

<p>MPI synchronization is used to coordinate processes using methods like barrier synchronization.</p> Signup and view all the answers

<p>It means Java applications can run on any system with a JVM, regardless of the operating system. This benefits clusters because they often have heterogeneous systems.</p> Signup and view all the answers

<p>The java.net package simplifies network communication, while java.util.concurrent provides tools for managing multi-threaded operations, vital for maximizing cluster resource use.</p> Signup and view all the answers

<p>The JVM handles memory allocation and garbage collection automatically, relieving the overhead of manual management. This is crucial for complex data structures used in clustered applications.</p> Signup and view all the answers

<p>JVMs can be optimized for specific applications. This allows for better resource utilization and enhanced performance, specifically tailored for each cluster node.</p> Signup and view all the answers

<p>Servlets and EJBs are crucial for creating reliable, secure, and transaction-managed middleware applications needed in a clustered environment.</p> Signup and view all the answers

<p>Spring and Hibernate are two frameworks commonly used for developing robust and scalable cluster applications.</p> Signup and view all the answers

<p>They provide essential functionalities for database connectivity, remote method invocation, and inter-application communication in distributed systems. This is key for scalable middleware.</p> Signup and view all the answers

<p>The uniform execution environment across different operating system is a benefit of the JVM. This simplifies deployment and maintenance.</p> Signup and view all the answers