Description : Overlay is: a) A part of an operating system b) A single contiguous memory that is used in olden days for running large programs by swapping c) Overloading the system with many user files d) None of The Above
Last Answer : b) A single contiguous memory that is used in olden days for running large programs by swapping
Description : Working set model is used in memory management to implement the concept of (A) Swapping (B) Principal of Locality (C) Segmentation (D) Thrashing
Last Answer : (B) Principal of Locality
Description : A byte addressable computer has a memory capacity of 2 m Kbytes and can perform 2 n operations. An instruction involving 3 operands and one operator needs a maximum of (A) 3m bits (B) m + n bits (C) 3m + n bits (D) 3m + n + 30 bits
Last Answer : (D) 3m + n + 30 bits
Description : In IT, associative memory is called as (1) Virtual memory (2) Cache memory (3) Content addressable memory (4) Main memory
Last Answer : Content addressable memory
Description : Following is/are the reasons for process suspension. A) Swapping parent process B) Inter request C) Timing D) All of the above
Last Answer : D) All of the above
Description : .................. is a facility that allows programmers to address memory from a logical point of view, without regard to the main memory, physically available. A) Visual memory B) Real memory C) Virtual memory D) Secondary memory
Last Answer : C) Virtual memory
Description : Which of the following statements is incorrect for Parallel Virtual Machine (PVM)? (A) The PVM Communication model provides asynchronous blocking send, asynchronous blocking receive and non-blocking receive function. ... of such messages. (D) In PVM Model, the message order is not preserved.
Last Answer : (D) In PVM Model, the message order is not preserved.
Description : A process that execute only in main memory is referred to as ……………… and that allocated in disk is referred to a ……………. A) virtual memory, true memory B) virtual memory, real memory C) real memory, virtual memory D) imaginary memory, real memory
Last Answer : C) real memory, virtual memory
Description : Which of the following information not included in memory table? A) The allocation of main memory to process. B) The allocation of secondary memory to process C) Any information needed to manage virtual memory D) Any information about the existence of file
Last Answer : D) Any information about the existence of file
Description : A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following ... separate stack for each thread. (D) OS does not maintain virtual memory state for each thread.
Last Answer : (B) OS maintains only CPU registers for each thread.
Description : A virtual memory based memory management algorithm partially swaps out a process. This is an example of (A) short term scheduling (B) long term scheduling (C) medium term scheduling (D) mutual exclusion
Last Answer : (C) medium term scheduling
Description : What is the most appropriate function of Memory Management Unit (MMU) ? (A) It is an associative memory to store TLB (B) It is a technique of supporting multiprogramming by creating dynamic partitions ... to physical address (D) It is an algorithm to allocate and deallocate main memory to a process
Last Answer : (C) It is a chip to map virtual address to physical address
Description : Technique of using disk space to make programs believe that the system contains more Random Access Memory(RAM) than is actually available is called ______ A. Random Access Memory B. Primary Memory C. Secondary Memory D. Virtual Memory
Last Answer : D. Virtual Memory
Description : With …………………. A page is written out to secondary memory only when it has been selected for replacement. A) pre-cleaning B) demand cleaning C) required cleaning D) fast cleaning
Last Answer : B) demand cleaning
Description : Java programs are A) Faster than others B) Platform independent C) Not reusable D) Not scalable
Last Answer : B) Platform independent
Description : What type of memory is not directly addressable by the CPU and requires special softw3are called EMS (expanded memory specification)? A) Extended B) Expanded C) Base D) Conventional
Last Answer : Answer : B
Description : Control memory is part of __ that has addressable storage registers and used as temporary storage for data. a. ROM b. RAM c. CPU d. Memory
Last Answer : b. RAM
Description : Because we wish to allow each ASCII code to occupy one location in memory, most memories are _____ addressable. a. BYTE b. NIBBLE c. WORD (16 bits) d. DOUBLEWORD (32 bits)
Last Answer : a. BYTE
Description : What type of memory is not directly addressable by the CPU and requires special softw3are called EMS (expanded memory specification)? a. Extended b. Expanded c. Base d. Conventional
Last Answer : b. Expanded
Description : Which of the following is used for very high speed searching applications ? (1) Flash Memory (2) Content-addressable Memory (3) Dynamic Random Access Memory (4) Static Random Access Memory
Last Answer : Content-addressable Memory
Description : Images tend to be very large collection of data. The size of memory required for a 1024 by 1024 image in which the colour of each pixel is represented by a n-bit number, (in an 8 bit machines) is (A) n × 8 MB (B) n / 8 MB (C) (1024 × 1024) / 8 MB (D) 1024 MB
Last Answer : (B) n / 8 MB
Description : ..................... provides a larger sized of virtual memory but require virtual memory which provides multidimensional memory. A) Paging method B) Segmentation method C) Paging and segmentation method D) None of these
Last Answer : B) Segmentation method
Description : A part of Windows 2000 operating system that is not portable is (A) Device Management (B) Virtual Memory Management (C) Processor Management (D) User Interface
Last Answer : (B) Virtual Memory Management
Description : A virtual memory has a page size of 1K words. There are eight pages and four blocks. The associative memory page table contains the following entries: Which of the following list of virtual addresses (in ... 1234, 4012, 5000, 6200 (C) 1020, 3012, 6120, 8100 (D) 2021, 4050, 5112, 7100
Last Answer : Answer: C Explanation: The pages which are not in main memory are: 1020 will not cause page fault (1024-2047) 3012 will not cause page fault (3072-4095) 6120 will not cause page fault (4096-5119) 8100 will not cause page fault (6144-7167)
Description : Suppose that the virtual Address space has eight pages and physical memory with four page frames. If LRU page replacement algorithm is used, .............. number of page faults occur with the reference string. 0 2 1 3 5 4 6 3 7 4 7 3 3 5 5 3 1 1 1 7 2 3 4 1 (A) 11 (B) 12 (C) 10 (D) 9
Last Answer : (A) 11
Description : The different types of tables maintained by the operating system are ............. A) memory, logical , I/O file B) memory, I/O, file, physical C) memory, I/O, file, process D) memory, logical, I/O, physical
Last Answer : C) memory, I/O, file, process
Description : Which of the following is not the function of Microkernel? A) File management B) Low-level memory management C) Inter-process communication D) I/O interrupts management
Last Answer : A) File management
Description : The CPU of a system having 1 MIPS execution rate needs 4 machine cycles on an average for executing an instruction. The fifty percent of the cycles use memory bus. A memory read/write employs one machine cycle. For ... (A) 500 Kbytes/sec (B) 2.2 Mbytes/sec (C) 125 Kbytes/sec (D) 250 Kbytes/sec
Last Answer : (D) 250 Kbytes/sec
Description : Let Pi and Pj be two processes, R be the set of variables read from memory, and W be the set of variables written to memory. For the concurrent execution of two processes Pi and Pj, which of the following conditions is not true? (A) R(Pi)∩W(Pj)=Φ (B) W(Pi)∩R(Pj)=Φ (C) R(Pi)∩R(Pj)=Φ (D) W(Pi)∩W(Pj)=Φ
Last Answer : (C) R(Pi)∩R(Pj)=Φ
Description : In ............. method, the word is written to the block in both the cache and main memory, in parallel. (A) Write through (B) Write back (C) Write protected (D) Direct mapping
Last Answer : (A) Write through
Description : Is it faster to have my old computer use the hard drive, or would a USB drive be faster for virtual memory?
Last Answer : Hard drive is faster than USB.
Description : Which of the following is incorrect? a) Layered architectures are highly changeable, so this pattern can be used when changeability is an important quality attribute CSE-R17.BLOGSPOT.COM b) Layered-style programs ... of the rest of the program c) All of the mentioned d) None of the mentioned
Last Answer : None of the mentioned
Description : ………………….. means coordinated effort, to communicate the information of the system written form. A) System documentation B) Resource required C) Development schedule D) User Document
Last Answer : A) System documentation
Description : A DFD is normally leveled as A) It is a good idea in design B) It is recommended by many experts C) it is easy to do it D) It is easier to read and understand a number of smaller DFDs than one large DFD
Last Answer : D) It is easier to read and understand a number of smaller DFDs than one large DFD
Description : Consider a program that consists of 8 pages (from 0 to 7) and we have 4 page frames in the physical memory for the pages. The page reference string is : 1 2 3 2 5 6 3 4 6 3 7 3 1 5 3 6 3 4 2 4 3 4 5 ... to fill available page frames with pages): (A) 9 and 6 (B) 10 and 7 (C) 9 and 7 (D) 10 and 6
Last Answer : (B) 10 and 7
Description : In a demand paging memory system, page table is held in registers. The time taken to service a page fault is 8 m.sec. if an empty frame is available or if the replaced page is not modified, and it takes 20 m.secs., if the replaced ... ? (A) 11.6 m.sec. (B) 16.4 m.sec. (C) 28 m.sec. (D) 14 m.sec.
Last Answer : (B) 16.4 m.sec.
Description : Suppose that the number of instructions executed between page faults is directly proportional to the number of page frames allocated to a program. If the available memory is doubled, the mean interval between page faults is also ... memory were available? (A) 60 sec (B) 30 sec (C) 45 sec (D) 10 sec
Last Answer : Answer: C Explanation: T = Ninstr x 1µs + 15,000 x 2,000 µs = 60s Ninstr x 1µs = 60,000,000 µs - 30,000,000 µs = 30,000,000 µs Ninstr = 30,000,000 The number of instruction ... doesn't mean that the program runs twice as fast as on the first system. Here, the performance increase is of 25%.
Description : ........... is a large kernel, including scheduling file system, networking, device drivers, memory management and more. A) Monolithic kernel B) Micro kernel C) Macro kernel D) Mini kernel
Last Answer : A) Monolithic kernel
Description : State whether the following statement is true. i) It takes less time to terminate a thread than a process. ii) Threads enhance efficiency in communication between different executing programs. A) i-True, ii-False B) i-True, ii-True C) i-False, ii-True D) i-False, ii-False
Last Answer : B) i-True, ii-True
Description : Which two books, movies, or television programmes would be made more entertaining by swapping their cast of characters?
Last Answer : King of the hill and South Park
Description : Assuming that the disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O block requests are 98, 37, 14, 124, 65, 67: (A) 310 (B) 324 (C) 320 (D) 321
Last Answer : (D) 321
Description : If the Disk head is located initially at track 32, find the number of disk moves required with FCFS scheduling criteria if the disk queue of I/O blocks requests are: 98, 37, 14, 124, 65, 67 (A) 320 (B) 322 (C) 321 (D) 319
Last Answer : (C) 321
Description : A dynamic RAM has refresh cycle of 32 times per msec. Each refresh operation requires 100 nsec and a memory cycle requires 250 nsec. What percentage of memory’s total operating time is required for refreshes? (A) 0.64 (B) 0.96 (C) 2.00 (D) 0.32
Last Answer : Answer: D Explanation: in 1ms : refresh = 32 times Memory cycle = 1ms/250ns = 106ns/250ns = 4000 times Therefore, % of refresh time = (32 x 100ns)/(4000 x 250ns) = 3200ns/1000000 x 100% = 0.32%
Description : 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: (1) 14 and 15 (2) 14 and 29 (3) 15 and 14 (4) 16 and 32
Last Answer : (3) 15 and 14
Description : ........... is a large kernel containing virtually the complete operating system, including, scheduling, file system, device drivers and memory management. A) Multilithic kernel B) Monolithic kernel C) Micro kernel D) Macro kernel
Last Answer : B) Monolithic kernel
Description : Does wife swapping really takes place in India?
Last Answer : No really not people have a lot of myths about India because of the diversity of people in the rural areas but I don't think that these types of things take place here
Description : What is difference between paging and swapping?
Last Answer : Nothing -- they are the same thing.
Description : A situation where two companies hold shares in each other is called ? 1. equity holding 2. swapping 3. reciprocal holding 4. cross holding 5. None of these
Last Answer : cross holding
Description : Point out the wrong statement : A. Full virtualization requires that the host operating system provide a virtual machine interface for the guest operating system and that the guest access hardware through ... A process virtual machine instantiates when a command begins a process D. All of the above
Last Answer : Full virtualization requires that the host operating system provide a virtual machine interface for the guest operating system and that the guest access hardware through that host VM