Match the following with respect to various memory management algorithms : Codes :List - I List - II (a) Demand paging (i) degree of multiprogramming (b) Segmentation (ii) working set (c) Dynamic partitions (iii) supports user view of memory (d) Fixed partitions (iv) compaction
| a | b | c | d |
| (ii) | (iii) | (iv) | (i) |
Demand paging loads pages as needed and its behaviour is governed by the working set of a process, so (a) - (ii).
Segmentation divides a program into logical units such as code, stack and data, matching the user view of memory, so (b) - (iii).
Dynamic partitions leave external fragments that are removed by compaction, so (c) - (iv); fixed partitions directly fix the degree of multiprogramming, so (d) - (i).
Hence, a - ii, b - iii, c - iv, d - i.
In a distributed computing environment, distributed shared memory is used which is
Function of memory management unit is :
What is the most appropriate function of Memory Management Unit (MMU) ?
In a paged memory management algorithm, the hit ratio is 70%. If it takes 30 nanoseconds to search Translation Look-aside Buffer (TLB) and 100 nanoseconds (ns) to access memory, the effective memory access time is
In the context of Binding which one of the following is incorrect?
Match List - I with List - II.
| List - I (operating system concepts) | List - II (characteristics) |
|---|---|
| (A) Paging | (I) Evicts least recently used process |
| (B) LRU (Least Recently Used) | (II) Extends physical memory |
| (C) C-SCAN | (III) Logical to physical mapping |
| (D) Virtual Memory | (IV) Circular disk access |
Choose the correct answer from the options given below :
In a paging system, it takes 30 ns to search translation Look-a-side Buffer (TLB) and 90 ns to access the main memory. If the TLB hit ratio is 70%, the effective memory access time is :
Which of the following statement(s) regarding a linker software is/are true ?
I. A function of a linker is to combine several object modules into a single load module.
II A function of a linker is to replace absolute references in an object module by symbolic references to locations in other modules.
A memory management system has 64 pages with 512 bytes page size. Physical memory consists of 32 page frames. Number of bits required in logical and physical address are respectively :
A specific editor has 200 K of program text, 15 K of initial stack, 50 K of initialized data, and 70 K of bootstrap code. If five editors are started simultaneously, how much physical memory is needed if shared text is used ?
Computational circuitry in a CPU is referred to as the ____________
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Major advantage of DRAM is that the capacitor cell never loses its charge and hence there is no need to refresh periodically.
Reason R: When DRAM is being refreshed, the data cannot be accessed.
In light of the above statements, choose the correct answer from the options given below
The data transfer rate of a modem is measured in
In the year 1993, _________ introduced the first microcontroller using flash memory.
Scratch pad memory is __________