Operating System MCQs

When keeping a list of all the links/references to a file, and the list is empty, implies that _____________

When a cycle exists, the reference count maybe non zero, even when it is no longer possible to refer to a directory or file, due to _______

A device driver can be thought of like a translator. Its input consists of _____ commands and output consists of _______ instructions.

The file organization module knows about _____________

Metadata includes _____________

For each file there exists a ___________ that contains information about the file, including ownership, permissions and location of the file contents.

For processes to request access to file contents, they need _____________

During compaction time, other normal system operations _______ be permitted.

In the linked allocation, the directory contains a pointer to which block? I. first block II. last block

There is no __________ with linked allocation.

What is the major disadvantage with a linked allocation?

What if a pointer is lost or damaged in a linked allocation?

FAT stands for _____________

By using FAT, random access time is __________

The three major methods of allocating disk space that are in wide use are _____________

In contiguous allocation _____________

In linked allocation _____________

In indexed allocation _____________

On systems where there are multiple operating system, the decision to load a particular one is done by _____________

The VFS (virtual file system) activates file system specific operations to handle local requests according to their _______

Contiguous allocation of a file is defined by _____________

One difficulty of contiguous allocation is _____________

_______ and ________ are the most common strategies used to select a free hole from the set of available holes.

The first fit and best fit algorithms suffer from _____________

To solve the problem of external fragmentation ________ needs to be done periodically.

If too little space is allocated to a file _____________

Reliability of files can be increased by _____________

Protection is only provided at the _____ level.

What is the main problem with access control lists?

Many systems recognize three classifications of users in connection with each file (to condense the access control list).

All users in a group get _______ access to a file.

Universe consists of _____________

To control access the three bits used in UNIX are represented by _____________

If each access to a file is controlled by a password, then what is the disadvantage?

What will happen in a multi level directory structure?

In UNIX, the directory protection is handled _________ to the file protection.

Disks are segmented into one or more partitions, each containing a file system or ______

What is the mount point?

When a file system is mounted over a directory that is not empty then _____________

In UNIX, exactly which operations can be executed by group members and other users is definable by _____________

A process _____ lower the priority of another process if both are owned by the same owner.

In distributed file system ________________ directories are visible from the local machine.

In the world wide web, a ____ is needed to gain access to the remote files, and separate operations are used to transfer files.

The machine containing the files is the _______ and the machine wanting to access the files is the ______

Distributed naming services/Distributed information systems have been devised to _____________

Domain name system provides _____________

To recover from failures in the network operations _____________ information may be maintained.

The series of accesses between the open and close operations is a _____________

A better way of contiguous allocation to extend the file size is _____________

If the extents are too large, then what is the problem that comes in?