एक ऑपरेटिंग सिस्टम में, शेल (shell) को ______ के रूप में भी जाना जाता है।

Suppose P1, P2, P3, and P4 are cooperating processes sharing a common resource under the Mutual Exclusion condition. If process P3 is currently executing inside its critical section, then which of the following must be true?

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Increasing the total number of physical memory frames allocated to a process can counterintuitively result in an increased number of page faults when using the First-In-First-Out (FIFO) algorithm. Reason R: The FIFO algorithm is not a stack-based algorithm, whereas algorithms like Optimal (OPT) or Least Recently Used (LRU) belong to the stack-based category. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Compaction is a technique utilized to eliminate external fragmentation by shuffling memory contents to gather all free memory into a single contiguous block. Reason R: The process of compaction strictly necessitates the use of execution-time binding because memory addresses must be changed and data relocated while the program is running. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In an operating system utilizing basic paging, the time required to access a memory location is inherently double that of a standard physical memory access. Reason R: A Translation Lookaside Buffer (TLB) functions as a high-speed associative hardware cache that stores recently used mappings from the page table to improve system performance. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Execution-time address binding necessitates the use of a hardware-based Memory Management Unit (MMU) to perform runtime address translation. Reason R: Modern operating system features, such as virtual memory and dynamic relocation, are fundamentally built upon the capabilities provided by execution-time binding. In the light of the above statements, choose the most appropriate answer from the options given below: