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AIO Mastery Quiz

Test your knowledge of Asynchronous Input/Output (AIO) concepts with this comprehensive quiz designed for developers and students alike. Each question challenges your understanding of AIO operations in a POSIX environment, ranging from basic concepts to intricacies of its implementation.

Features:

11 questions covering essential AIO topics
Checkbox and multiple-choice formats
Perfect for reinforcing your practical knowledge

11 Questions3 MinutesCreated by ReadingByte742

The aio_error function

Can read an error code of an AIO operation (including 0 indicating success)

Returns the status of an AIO operation

Is a blocking function - allows to wait for an AIO operation to finish

Reads the same result value for an AIO operation as value returned by synchronous calls to read / write/ fsync

What means can POSIX AIO use to notify about a finished read or write operation?

By starting a new thread

By starting a new process

By a specified mutex

By a signal delivery

By sending a specified byte to the standart input of the process

In which aspects aio_write and write behave differently (not taking into account that aio_write must be synced)?

Possibility of getting error indication insufficient space on the device

Setting the position where the bytes will be written

Interruption of the operation by a signal after writing some bytes

Interruption of the operation by a signal before writing any bytes

Maximum number of bytes that can be read vy this function

Ability to tell if the end of file was reached

Position in file where bytes will be read

A call to aio_suspend has returned success (value 0). Calling the function again immediately with exactly the same parameter values will result in:

The function will return successfully after the first not yet finished aio operation from the list will end or will return instantaneously if there is no such operation

The function will return with an error and set errno to the value indicating bad arguments

The function will block indefinitely unless interrupted by a signal delivery

The function will return successfully after the first not yet finished aio operation from the list will end or will block indefinitely if there is no such operation unless interrupted by a signal delivery

The function will return instantaneously

How to efficiently check the file size in a POSIX system?

Use readdir which returns a structure containing file size information

Use lseek

Use stat

Read all bytes from the file and count them

Doing simultaneous AIO read and write at the same position in the same file will result in:

The read operation will return the old contents

The read operation will return EINVAL error

Undefined values of read bytes

The write operation will return EINVAL ERROR

The read operation will return the new contents

A call to aio_suspend succeeded. How to tell which of aio operations finished

By checking each of aiocb structures using aio_return

By examining block length in aiocb structures

By examining the number returned by the function

By examining the errno variable

By checking each of aiocb structures using aio_error

Which kinds of AIO implementation are allowed by POSIX?

Implementation of AIO within operating system kernel

Userspace implementation of AIO using threads

No AIO implementation, aio functions will return ENOSYS error