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MCQ Problems / Explanations

The degree of multi-programming is :

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The entry of all the PCBs of the current processes is in :

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The Process Control Block is :

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The state of a process is defined by :

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The number of processes completed per unit time is known as __________.

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Which system call returns the process identifier of a terminated child?

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A process stack does not contain

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A set of processes is deadlock if

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What is the ready state of a process?

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A process can be terminated due to

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

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Which one of the following is not a real time operating system?

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. If a process fails, most operating system write the error information to a

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By operating system, the resource management can be done via

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The scheme used in the above question is known as _ or __.

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What is operating system?

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With a shared file

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The larger the block size, the the internal fragmentation.

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Data cannot be written to secondary storage unless written within a

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What is the mounting of file system?

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To avoid deadlock

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Which of the following condition(s) is/are required for a deadlock to be possible?

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A Process Control Block(PCB) does not contain which of the following?

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The backing store is generally a

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From the following, which is not a common file permission?

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Which of the following are forms of malicious attack?

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Which of the following are the two parts of the file name?

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File type can be represented by

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Which one of the following is the deadlock avoidance algorithm?

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A parent process calling system call will be suspended until children processes terminate.

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A parent process calling system call will be suspended until children processes terminate.

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Thrashing the CPU utilization.

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In virtual memory, which is not a page replacement algorithm ?

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In a time-sharing operating system, when the time slot given to a process is completed, the process goes from the r...

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What is operating system?

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The swaps processes in and out of the memory.

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The number of the threads in the pool can be decided on factors such as

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Thread pools help in

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If the thread pool contains no available thread

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What is the idea behind thread pools?

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Each connection arriving at multi threaded servers via network is generally

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Instead of starting a new thread for every task to execute concurrently, the task can be passed to a

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Thread pools are useful when

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In UNIX, the .................... system call is used to send a signal.

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In UNIX, the .................... system call is used to send a signal.

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A process can never be sure that a signal it has sent

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In most cases, if a process is sent a signal while it is executing a system call

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The usual effect of abnormal termination of a program is

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The usefulness of signals as a general inter process communication mechanism is limited because

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In UNIX, the set of masked signals can be set or cleared using the ............... function.

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The ............. maintains pending and blocked bit vectors in the context of each process.

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The ............. maintains pending and blocked bit vectors in the context of each process.

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When a process blocks the receipt of certain signals?

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Signals are identified by

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The three ways in which a process responds to a signal are

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Signals of a given type

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Which of the following is not TRUE?

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Which of the following is not TRUE?

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Signals that occur at the same time, are presented to the process

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If multiple threads are concurrently searching through a database and one thread returns the result then the remain...

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Cancellation point is the point where

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Cancelling a thread asynchronously

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When the target thread periodically checks if it should terminate and terminates itself in an orderly manner, it is...

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When one thread immediately terminates the target thread, it is called

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When a web page is loading, and the user presses a button on the browser to stop loading the page?

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What is Thread cancellation?

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If a process does not call exec after forking

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If exec is called immediately after forking

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If a thread invokes the exec system call

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A fork system call will fail if

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Which of the following calls never returns an error?

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Which of the following system calls transforms executable binary file into a process?

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Which of the following system calls does not return control to the calling point, on termination?

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In the Many to Many model true concurrency cannot be gained because

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When is the Many to One model at an advantage?

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Which of the following is the drawback of the One to One Model?

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The One to One model allows

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In the Many to One model, multiple threads are unable to run in parallel on multiprocessors because of

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In the Many to One model, if a thread makes a blocking system call

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The model in which one user-level thread is mapped to many kernel level threads is called

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The model in which one kernel thread is mapped to many user-level threads is called

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Which of the following is FALSE?

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If a kernel thread performs a blocking system call,

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Because the kernel thread management is done by the Operating System itself

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The kernel is ............. of user threads.

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A process having multiple threads of control implies

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Multithreading on a multi - CPU machine

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Resource sharing helps

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A thread shares its resources(like data section, code section, open files, signals) with

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A thread is also called

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Thread synchronization is required because

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The register context and stacks of a thread are deallocated when the thread?

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Which one of the following is not a valid state of a thread?

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Termination of the process terminates

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The jacketing technique is used to

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When the event for which a thread is blocked occurs?

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The time required to create a new thread in an existing process is

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If one thread opens a file with read privileges then

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A process can be

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Which one of the following is not shared by threads?

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