OPERATING SYSTEMS FOR COMPUTERS
COMPUTER OPERATING SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Daemon
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Semaphore
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Cache
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Vm (Virtual Machine)
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Detailed explanation-1: -Daemons are processes that run unattended. They are constantly in the background and are available at all times. Daemons are usually started when the system starts, and they run until the system stops. A daemon process typically performs system services and is available at all times to more than one task or user.
Detailed explanation-2: -A Daemon is a kind of program that keeps on running silently in the background. It is activated by the occurrence of a certain event or condition. It accommodates the service requests from other computers on a computer network and it is also responsible for responding to other programs and hardware activity.
Detailed explanation-3: -A daemon is also called background processes. It is a UNIX or Linux program that executes inside the background. Almost every daemon contains names that finish with “d” the letter. For example, sshd, this manages connections of SSH remote access, or the httpd daemon that manages the Apache server.
Detailed explanation-4: -Most user processes (daemons) call the syslog(3) function to generate log messages. This causes the message to be sent to the UNIX domain datagram socket /dev/log . A user process on this host or some other host that is connected to this host by a TCP/IP network, can send log messages to UDP port 514.