Osg202 - Study guides, Class notes & Summaries

: An Operating System is? - ️️A program that acts as an intermediary between a user of a computer and the computer hardware _______ is the rapid switching of the CPU between multiple processes in memory - ️️toicankey Multi-programming ____ gives users the appearance that their programs are being completely loaded in main - ️️Virtual memory ____ include(s) every peripheral unit in the system such as printers, disk drives, CD/DVD drives, flash memory, keyboards, and so on. - ️...

Which type of OS structure does give each user a subset of the resource instead of exact copying entire of underlying real machine? A. Virtual Machine B. Extend Kernel C. Extra Kernel D. ExoKernel - ️️D Which of these statements about Microkernel are true? A. The modules run user mode `rightarrow` protection against bugs B. All the layers went in the kernel C. Resist crashing the entire system D. All of the others - ️️A What is the below five statements described? 1. Put t...

Which of the following actions generates an external interrupt? * 1/1 A system call instruction is executed. Division by zero occurs. An input/output operation is completed. A page that does not exist in the main memory is accessed by the virtual storage management. - ️️An input/output operation is completed. Which of the following is not a step in the boot process? * 1/1 The antivirus program checks all files for viruses Configuration and customization settings are checked The op...

_____ are used to model printers, modems, and other devices that accept or output a character stream a. A character special file b. A separate special file c. A block special file d. A pipe special file - ️️a Which of these statements about Monolithic Systems are true? a. A set of service procedures that carry out the system calls b. A set of utility procedures that Help the service procedures c. A main program that invokes the requested service procedure d. All of others - ️️a...

Which OS can provide many services as print, file, Web, email, ect? Select one: A. PC OS B. Server OS C. Mainframe OS D. Multiprocessor OS - ️️B Which of these statements about processes are true? Select one or more: A. A program in execution B. Associated with each process is set of resources such as executable code, data, stack, CPU registers value, and other information needing to run a program C. Process table stores all the information of processes D. Associated with each pr...

OSG202 EXAM QUESTIONS AND ANSWERS

Which is not an example of a resource that is commonly time-multiplexed? * 1/1 CPU Graphics accelerator Main memory Network interface - ️️C Consider a computer system that has cache memory, main memory (RAM) and disk, and OS uses virtual memory. It takes 2 nsec to access a byte from the cache, 20 nsec to access a byte from RAM, and 10 msec to access a block of 1000 bytes from the disk. If a book has 1000 pages, each with 50 lines of 80 characters each, How long it will take to elec...

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OSG202-Questions And Answers