distributed systems- system utilities-Hardware Protection-Hand held Systems-Virtual machine-System Programs-System Calls- Operating Services

1. What is meant by the soft real-time system?

It provides priority to the tasks based on their criticality. It does not guarantee
completion of critical tasks in time.

2. What is meant by distributed systems?

A distributed system is basically a collection of autonomous computer systems
which co-operate with one another through their h/w and s/w interconnections.

3. What are the disadvantages of distributed systems?

Ø Security weakness
Ø Over dependence on performance and reliability
Ø Maintenance and control become complex

4. What are the modes of operation in Hardware Protection?

Ø User Mode
Ø Monitor Mode

5. What are Operating Services?

Normally, an operating system provides certain services to programs and to the
users of those programs. Some of them are:
Ø Program Execution.
Ø I/O operations
Ø File-system manipulation
Ø Communications
Ø Error Detection

6. What is System Programs?

System programs provide a convenient environment for program development and
execution. Some of these programs are user interfaces to system calls and others are more
complex. Some of them are:
Ø File Management
Ø Status Information
Ø File modification
Ø Programming Language support
Ø Program loading, execution, and communication.

7. What is meant by System Calls?

The System Calls acts as an interface to a running program and the Operating
system. This system calls available in assembly language instructions.

8. What is the Virtual machine?

The Application programs view everything under them in the hierarchy as though
the system programs were part of the machine itself. This layered approach is taken to the logical conclusion in the concept of a Virtual machine.

9. What is meant by Handheld Systems?

Handheld Systems have a small amount of memory including slow processors and
also, small display screens and are of limited size and they always have connectivity to a network.

10. What is known as system utilities?

Most operating systems are supplied with programs that solve common problems
or perform common operations. Such programs include web browsers, word processors
and text formatted, spreadsheets, database systems, compilers, plotting, and games. These programs are known as system utilities.


Comments

Post a Comment

Popular posts from this blog

Artificial Intelligence

Image
Artificial Intelligence 1.    What is AI technique? Artificial  Intelligence (AI)  is  the study  of  how  to make computers do things which, at  the moment, people do better. It is a method that exploits knowledge that should be represented in such a way that: ·    The knowledge captures generalizations. ·    It can be understood by people who must provide it. ·    It can be easily modified to correct errors and to reflect changes. ·    It can be used in situations even if it is not accurate and complete. ·    It helps to narrow the range of possibilities that is has to be considered. 2.    What are the steps to be considered to solve a problem? To solve a particular problem, the following steps are taken into account, ·    Define the problem precisely. ·    Analyze the problem. ·    Isolate and represent the task knowledge that is necessary to solve a problem. ·    Choose the best problem-solving techniques and apply it to a particular problem.
Read more

The taxonomy of CASE Tools

CASE Tool Taxonomy CASE tools can be classified by · by function, · by user type (e.g. manager, tester), or · by stage in SE process (e.g. requirements, test) The following taxonomy is classified by function. Business Information Tools model business information flow. The tools represent business data object and model their flow. Network tools could be modified to yield the same functionality. Process Management Tools model processes. You have to understand the process in order to model it. The tools help you capture process. This is a key component of TQI. Project Planning Tools help plan and schedule projects. Examples are PERT and CPM. Finding parallelismand eliminating bottlenecks assist in streamlining projects. Risk Analysis Tools helps build a risk table from the schedule outlining the risk each component of the production process and categorizing the risks as catastrophic, critical, marginal, or negligible. A cost is associated with eac
Read more

Zoho Second round - adding a digit to all the digits of a number

Adding a digit to all the digits of a number eg digit=4, number = 2875, o/p= 612119 C Program: #include<stdio.h> #include<conio.h> #include<string.h> int main() {     int t,n,i=0;     char num[100];     printf("Enter the digit: ");     scanf("%d",&n);     printf("Enter the number: ");     scanf("%s",num);     printf("o/p ");     for(i=0;i<strlen(num);i++)     {     printf("%d",num[i]-'0'+n);     }  getch();  return 0; }  
Read more