Question
Which of the following is a key challenge in handling
deadlocks in an operating system?Solution
Detailed Explanation: Deadlocks occur when a set of processes is blocked because each process is holding a resource and waiting for another resource held by another process. One of the primary methods for detecting deadlocks is using the resource allocation graph (RAG) . A cycle in this graph indicates a potential deadlock when resources are not reusable or preemptible. Detecting cycles involves examining the directed graph of resources and processes to find circular dependencies. Algorithms like Depth First Search (DFS) are commonly used for this purpose in deadlock detection. Deadlock detection is critical in systems where prevention or avoidance mechanisms are impractical, such as distributed systems. Once detected, the system must recover by terminating one or more processes or preempting resources, which can be complex and resource-intensive. Why Other Options Are Incorrect:
- Option A: Allocating resources fairly is more related to system performance and fairness policies rather than deadlock handling. Fairness does not directly address circular wait or hold-and-wait conditions.
- Option B: Preventing starvation is a separate issue. Starvation happens when low-priority processes wait indefinitely, often due to poor scheduling, not necessarily because of deadlocks.
- Option D: FCFS is a scheduling algorithm that manages the sequence of process execution but does not directly address or solve deadlocks.
- Option E: Managing shared memory involves synchronization and mutual exclusion issues but is not inherently about detecting cycles in deadlocks.
Suresh said that he had been cleaning his room when it started raining.
The officer ordered the fellow to be arrested.
Choose the option that is the direct form of the sentence.
He asked me to wait there until I got my turn.
The groom said to the bride, "I will take good care of you."
Select the correct direct form of the given sentence.
Shyam asked me how I had persuaded his sister.
Ram said,"Are you really serious about becoming a pilot, son?"
Mother needs your help in the kitchen.
She said, " I really wish I had bought that new car."
Select the correct indirect/direct speech for the given sentence
Sarita said that she might go home the next day with her mother.
...The manager said "Vivek must go tomorrow to meet the client".