What is a Real Time Operating System (RTOS) ?

• Real-Time systems are always on-line but on-line systems need not be real-timesystems.
• However, further constraints are placed in terms of response time and availability of the system.
• By definition, a real time system receive data and process it quickly enough to produce output which can be used to control or affect the outcome of an ongoing activity of process.
• In general, real-time systems handle small volumes of data at any one time andthe turnaround time is critical.
• Feedback is essential in real-time systems so that processing can keep pace withexternal factors.
• Most real-time systems are used in mission critical application like process control and therefore, reliability and availability is of paramount importance.
• Missile guidance systems are examples of real-time systems.
• Control signals are sent to the fins of the missile to correct any deviations.

Real Time Operating System (RTOS) Advantages :- 

• Error messages are immediate
• Source documents are available at the time the error occurs.
• Faster than on-line systems.

Real Time Operating System (RTOS) Disadvantages :- 

• Direct access devices have to be used.
• Elaborate controls and backup procedures to guard against unwarranted access to the system.
• Control checks are difficult since updating occurs at the time of processing.

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Basic Computer Questions

Q : The main system board of the computer is called ____.
(A) Motherboard
(B) Processor
(C) Microchip
(D) None of these

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Q : Which of the following system components is the brain of a computer?
(A) Circuit board
(B) CPU
(C) Memory
(D) Network card

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Answer ⇒ { B }

 
Q : What is the built-in permanent memory in a computer called?
(A) RAM
(B) ROM
(C) CPU
(D) CD-ROM

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Answer ⇒ { B }

 
Q : Which of the following is the full form of NTFS?
(A) New Tree File system
(B) New Technology file system
(C) New Table file system
(D) Both B and C

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Answer ⇒ { B }

 
Q : Which of the following is not a hardware processing chip ?
(A) Processing chip
(B) printer
(C) mouse
(D) Java

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Answer ⇒ { B }

 
Q : The monitor of a computer is-
(A) storage device
(B) processing device
(C) input device
(D) output device

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Answer ⇒ { D }

 
Q : Which protocol does Ping use?
(A) TCP
(B) ARP
(C) ICMP
(D) BootP
(E) None of these

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Answer ⇒ { C }

 
Q : If you wish to extend the length of the network without having the signal degrade, you would use a ___.
(A) Gateway
(B) Router
(C) Modem
(D) Repeater
(E) Resonator

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Answer ⇒ { D }

 
Q : A series of instructions that tells a computer what to do and how to do it is called a ______.
(A) program
(B) command
(C) user response
(D) processor
(E) None of these

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Answer ⇒ { A }

 
Q : Verification of a login name and password is known as_____.
(A) Configuration
(B) Accessibility
(C) Authentication
(D) logging in
(E) None of these
Answer ⇒ ??