os | Test

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What is not a main structural element of a computer system?

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Which of the following registers are used by the processor to exchange data with memory?

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Which of the following registers are used by the processor to exchange data with input/output module?

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Which of the following element of a computer system controls the operation of the computer and performs its data processing functions?

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Which of the following element of a computer system stores data and programs?

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Which of the following provides for communication among elements of a computer system?

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Which of the following element of a computer system moves data between the computer and its external environment?

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The processor contains a single data register, called

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This register specifies a particular input/output device

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This register is used for the exchange of data between an I/O module and the processor

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This register contains the data to be written into memory or which receives the data read from memory

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This register specifies the location in memory for the next read or write

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Index register, segment register, and stack register are example of:

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Which register contains the address of the next instruction to be fetched?

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Which register contains the instruction most recently fetched?

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Which register contains condition codes set by the processor hardware as the result of operations?

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The fetched instruction is loaded into the

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At the beginning of each instruction cycle, the processor fetches an instruction from the memory. The address of the instruction is held in

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The processor is executing ‘Load AC from memory’ instruction. Choose the correct micro-instructions:

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When an I/O device completes an I/O operation, the device issues an interrupt signal to the processor and then:

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When the time required for the I/O operation is less that the time to complete the execution of instructions between write operations in the user program, it is:

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When the time required for the I/O operation will take much more time than executing a sequence of user instructions, it is

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Most I/O devices are:

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If there no interrupts, after each write operation, the processor must

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Complete the relationship concerning the memory systems: faster access time –

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Complete the relationship concerning the memory systems: greater capacity –

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Complete the relationship concerning the memory systems: greater capacity –

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The smaller, more expensive, faster memory is:

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If the accessed word is found in the faster memory, that is defined as a:

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If the accessed word is not found in the faster memory, that is defined as a:

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The central idea in this system was the use of a piece of software known as the monitor

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The concept of a batch operating system was developed to

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The concept of modes of operation (user mode, system mode) was introduced with

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'Ease of evolution of an OS' corresponds to the following objective:

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The principal objective of the time-sharing system is to

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The processor was often idle waiting for the I/O instruction to conclude. To overcome the problem the following approach was introduced: when one job needs to wait for I/O, the processor can switch to the other job. This was a

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The programmer interacted directly with the computer hardware with

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Semaphore is a/an_to solve the critical section problem?

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'The OS as a resource manager' corresponds to the following objective:

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An un-interruptible unit is known as:

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A state is safe, if:

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'The OS as a User/Computer interface' corresponds to the following objective:

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This type of memory is nonvolatile

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An application programs is developed by the

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When a processor attempts to read a byte or word of memory, it firstly checks the:

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The end user views a computer system in terms of

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The serial processing presented two main problems:

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The hardware and software used in providing applications to a user can be viewed in a:

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A situation where several processes access and manipulate the same data concurrently and the outcome of the execution depends on the particular order in which access takes place is called:

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This contains the most frequently used functions in the OS:

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The initial value of the semaphore that allows only one of the many processes to enter their critical sections,is?

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Utilities are

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Block size is:

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There were no OS with

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Which of the following cannot be interrupted?

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Process is

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This determines which cache location the block will occupy:

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This resource can be created and destroyed

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This system handles multiple interactive jobs

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Process(2.0) is:

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This system was developed by General Motors for the use on an IBM 701

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This chooses which block to replace when a new block is to be loaded into the cache and the cache already had all slots filled with other blocks

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Four necessary conditions for deadlock to exist are: mutual exclusion, no-preemption, circular wait and

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A task in a blocked state

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This type of system was developed at MIT by a group known as Project MAC for the IBM 709 in 1961

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This resource can be safely used by only one process at a time and is not depleted by that use

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If the contents of a block in the cache are altered, then it is needed to save it back to main memory before replacing it. This is called:

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'Lost signals, duplicate signals received'. This is

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The systems which allows only one process execution at a time, are called

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Deadlock inevitable region can be referred to as a

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In the non-blocking send, non-blocking receive:

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Which of the following is not a technique possible for I/O operations?

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'Two or more programs hung up waiting for each other'. This error is caused by

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This illustrates the progress of two processes competing for two resources

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The processor issues an I/O command to a module and waits, periodically checking the status of the I/O module until it finds that the operation is complete.

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A monitor is a type of:

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The state of a process is defined by:

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'When programs share memory and their execution is interleaved by the processor, they may interfere with each other by overwriting common memory areas in unpredictable ways. The results of a particular program depend on the activities of other programs in a shared system'. This is

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The I/O module performs the requested action and then sets the appropriate bits in the I/O status register but takes no further action to alert the processor.

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When each process in the set is blocked awaiting for resource siezed by another blocked process

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Which of the following is not the state of a process?

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The described technique is:

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Choose the storage management responsibility for "Many application programs require means for storing information for extended periods of time, after the computer has been powered down"

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Suppose that a process is in “Blocked” state waiting for some I/O service. When the service is completed, it goes to the:

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Which of the following statements is false:

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Choose the storage management responsibility for "Programmers should be able to define program modules, and to create, destroy, and alter the size of modules dynamically"

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Which of the following state transitions is not possible?

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The main disadvantage of this technique: it is a time-consuming process that keeps the processor busy needlessly.

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Memory is:

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Choose the storage management responsibility for "The OS can achieve efficiency by assigning memory to jobs only as needed"

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If a process is executing in its critical section, then no other processes can be executing in their critical section. This condition is called

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The processor issues an I/O command to a module and then go on to some other useful work.

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Processor is:

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Choose the storage management responsibility for "The OS must allow portions of memory to be accessible in various ways by various users"

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Interprocess communication:

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The I/O module performs the requested action and alerts the processor to request service when it is ready to exchange data with the processor

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Choose the storage management responsibility for "The OS must prevent independent processes from interfering with each other's memory, both data and instructions"

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Program is:

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A sequence of instructions, in a computer language, to get the desired result, is known as?

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In operating system security and protection, authenticity:

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The main disadvantage of this technique: consumes a lot of processor time, because every word of data that goes from memory to I/O module or from I/O module to memory must pass through the processor

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In operating system, each process has its own:

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The memory allocation scheme subject to "external" fragmentation is?

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In operating system security and protection, availability is:

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For each process OS creates and manages:

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The processor issues an I/O command to a separate module, by sending the type of operation (read/write), the address of the I/O device, the starting location in memory for data, number of words. Then the processor continues with other work.

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The memory allocation scheme subject to "internal" fragmentation is?

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In operating system security and protection, confidentiality is:

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The module transfers the entire block of data to/from memory without going through the processor.

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The available vector defines

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Any program, no matter how small, will occupy an entire partition results in?

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In operating system security and protection, data integrity is:

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The main disadvantage of this technique: there is a competition for bus usage

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A binary semaphore is a semaphore with integer values:

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The resource vector define

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A hardcopy sign-up sheet was used to reserve computer time with

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Short-term scheduler, or dispatcher, picks a process. Each process in the queue is given some time in turn. This strategy is called:

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This matrix defines the current allocation to process i of the resource j

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A system clock generates interrupts at a rate of approximately one every 0.2 seconds. At each clock interrupt, the OS regained control and could assign the processor to another user. This technique is known as

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The base register

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The two atomic operations permissible on semaphores are:

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This matrix defines the amount of resources of type j requested by process i

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How to solve problem of equal-size partitions?
swapping (?) ----- page 318 book

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The limit register

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Batch operating systems were used (years)

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This matrix defines requirements of processes i for the resources j

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How to solve problem of "external" fragmentation?

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The principal tool available to system programmers in developing the early multiprogramming and multiuser interactive systems

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The banker's algorithm is referred to as

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A page fault?

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Job control language was used

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The process index register

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Which of the following condition is required for deadlock to be possible

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'Hold and wait' condition for deadlock is defined as

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Serial processing was used

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This term was first used by the designers of Multics in the 1960s

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Which of the following statements is false?

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Banker’s algorithm for resource allocation deals with:

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'Circular wait' condition for deadlock is defined as

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'Ease of evolution of an OS' corresponds to the following objective:

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Swapping

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'No preemption' condition for deadlock is defined as

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A system is in the safe state if:

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Virtual address is a

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Which of the following is not true about the memory management?

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True or false: segmentation suffers from external fragmentation?

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'Mutual exclusion' condition for deadlock is defined as

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True or false: paging suffers from external fragmentation?

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What is NOT an example of consumable resource?

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What is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks?

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What is NOT an example of reusable resource?

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In memory systems, boundary registers?

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On all instruction cycles, the processor accesses memory at least once, to:
, and often one or more additional times, and/or .

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Operating System maintains the page table for:

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A relationship between processes such that each has some part (critical section) which must not be executed while the critical section of another is being executed, is known as?

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In contiguous memory allocation:

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CPU fetches the instruction from memory according to the value of?

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When memory is divided into several fixed sized partitions, each partition may contain ________.

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The number of resources requested by a process:

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A memory used to provide a high speed is called?

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In fixed sized partition, the degree of multiprogramming is bounded by ___________.

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Which one of the following is the address generated by CPU?

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A deadlock avoidance algorithm dynamically examines the _____ to ensure that a circular wait condition can never exist

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The first fit, best fit and worst fit are strategies to select a ______.

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Runtime mapping from virtual to physical address is done by?

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In internal fragmentation, memory is internal to a partition and:

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Which of the following is not one of the principles of dealing with deadlock?

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The address of a page table in memory is pointed by:

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A solution to the problem of external fragmentation is:

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The Process Control Block is:

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Program always deals with:

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__ is generally faster than _ .

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Which one of the following is a synchronization tool?

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External fragmentation exists when:

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What is compaction?

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What controls the process in a single-threaded process model?(не точно) из книги

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External fragmentation will not occur when:

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When the memory allocated to a process is slightly larger than the process, then:

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In the non-blocking send:

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Main memory is broken into fixed-sized blocks called ________.:

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Fixed-length block of data in secondary memory is called ________.:

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Variable-length block of data that resides in secondary memory is called ________.

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The degree of multi-programming is:

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Every address generated by the CPU is divided into two parts:

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The __________ is used as an index into the page table.

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Trace of the process is: (из книги)

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The _____ table contains the base address of each page in physical memory.

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With paging there is no ________ fragmentation.

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A set of processes is deadlock if:

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The operating system maintains a ______ table that keeps track of how many frames have been allocated, how many are there, and how many are available.

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Operating Systems (OS) Test sobre os, creado por Csse 1502 el 17/12/2017.

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What is not a main structural element of a computer system?

Which of the following registers are used by the processor to exchange data with memory?

Which of the following registers are used by the processor to exchange data with input/output module?

Which of the following element of a computer system controls the operation of the computer and performs its data processing functions?

Which of the following element of a computer system stores data and programs?

Which of the following provides for communication among elements of a computer system?

Which of the following element of a computer system moves data between the computer and its external environment?

The processor contains a single data register, called

This register specifies a particular input/output device

This register is used for the exchange of data between an I/O module and the processor

This register contains the data to be written into memory or which receives the data read from memory

This register specifies the location in memory for the next read or write

Index register, segment register, and stack register are example of:

Which register contains the address of the next instruction to be fetched?

Which register contains the instruction most recently fetched?

Which register contains condition codes set by the processor hardware as the result of operations?

The fetched instruction is loaded into the

At the beginning of each instruction cycle, the processor fetches an instruction from the memory. The address of the instruction is held in

The processor is executing ‘Load AC from memory’ instruction. Choose the correct micro-instructions: