operating systems Online Quiz - 24

CPU speed is measured in megahertz (MHz) or gigahertz (GHz), representing clock cycles per second. One MHz equals one million cycles per second. Hectares measure area, RPM measures rotational speed (used for disk drives), and bits per second measure data transfer rates (network bandwidth). The CPU's clock speed determines how many instructions it can process per second, making MHz the correct unit.

Statement D is false because applications CAN be shared over a LAN. Local Area Networks are specifically designed to allow resource sharing including applications, files, and printers. Statements A, B, and C are all true statements about networks.

A network (not a mainframe) enables users to share files, printers, and other resources. Option A is wrong because mainframes are centralized computers, not networks. Option B contains a typo and is conceptually the same as A. Option C correctly identifies that networks enable resource sharing.

The command ls -ltr | grep "^d" lists directory contents with long format, sorting by modification time in reverse order, and filters lines starting with d (which represents directories in Unix file permission strings). The other options filter by l (symbolic links) or do not filter for directories.

The tar command with -c flag creates archives, -v enables verbose mode, and -f specifies the filename. The correct syntax is 'tar -cvf destination.tar sourcefile' where the destination comes before the source. Option C has the right flags and command structure for creating an archive. Options A reverses the order, B extracts files, and D uses a non-existent -d flag.

In MS-DOS 6.22, the version number 6.22 uniquely identifies this specific product release. The terms 'MS', 'DOS', and 'Ms-DOS' are general product names that apply to all versions, not unique identifiers.

The DATE command is used to display or set the system date in MS-DOS. VER displays version info, DISK isn't a standard command, and FORMAT prepares disks.