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  #2  
5th January 2016, 10:55 AM
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Join Date: May 2012
Re: Lords Sample Paper PTU

Hello, here I am providing you the sample paper of the lords PTU as under:

Q1 What is real time system?
Ans.
Any system where a timely response by the computer to external stimuli in vital is a real time system.
Example:
A CAR-AND-DRIVE EXAMPLE if we consider a familiar problem of human control driving a car. The driver is the real-time controller, the car is the controlled process, and the other cars together with the road conditions make up the operating environment.

Q2 Explain all types of system?
Ans.
We have two types of real time system:
(1)Soft real time system.(2)Hard real time system.

(i) Hard real time system:
The requirement that all hard timing constraints must be validated invariably places many restrictions on the design and implementation of hard real-time applications as well as the architectures of hardware and system software used to support them.
(ii)Soft real time system:
A system in which jobs have soft deadlines is a soft-real system. The developer of a real time system is surely required to prove rigorously that the system surely meet its real time performance objective.
Example:
On line transaction system telephone switches as well as electronic Ames.

Q3. What are the issues in real time system?
Ans.
A real time computer must be much more reliable than its individual hardware and software component. It must be capable of working in harsh environments.
For example:
Take task scheduling. Real time computer systems differ from their general-purpose counterparts in two important ways. Firstly they are much more specific in their applications, and second, the consequences of their failure all more drastic.

Q4. Define real time database?
Ans.
The term real time database system refers to a diverse spectrum of information systems, ranging from stock price quotation systems, to tracks records databases, to real time file systems a real time database contains data objects, called Image objects, that represent real-world object the attributes of an image object are these of represented real world object for example an air traffic control database contains image objects that represent aircraft in the courage area.

Q5. Explain release time, deadlines and timing Constraints?
Ans.
Release Time:
The release time of job is the instant of time at which the job becomes available for execution. The job can be scheduled and executed at any time at or after its release time whenever its data and control dependency conditions are met. As an example: We consider a system which monitors and Controls several furnaces.
Dead lines:
The dead lines of a job is the instant of time by which its execution is required to be computed suppose that in the pervious example, each control low computation job must complete by the release time of the subsequent job. Then, their deadlines are 120 m sec, 220 m sec and so on, respectively.
Timing Constraints:
A timing constraints of a job can be specified in term of its release time and relative or absolute deadlines as illustrated by the above example: some complex timing constraints cannot be specified conveniently in terms of release times and deadlines.


PTU Lords paper:



  #3  
24th November 2017, 07:52 PM
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Re: Lords Sample Paper PTU

can I get ptu btech 1st year question papers solved ????


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