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Computer Programming

A category for questions about computer programming and programming languages.

10,506 Questions

Who is a Computing Professional?

Absolutely anyone who chooses to call themselves that and attempts to gain financially from it.

There are "Computing Professionals" for example hired by many computer companies (such as Dell) who's job it is to answer a phone, then ask you a series of multiple choice (yes/no) questions as they are displayed on the screen and then try and solve your problems based on what the computer tells them. This is a fantastic "Computing professional" alternative to working as a burger flipper for minimum wage. The people doing it simply need to be able to listen, read and click yes or no. They don't even need to know how to use a computer themselves. If the database can't solve the problem, they pass the problem to the next level of tech support which are people who may have actually tried to understand computers. It's pure genius by companies like Dell to do this since it cuts down the cost of skilled labor possibly by a factor of 100.

As a bonus, a computer expert is someone who knows enough about computers to fix some problems, but not enough about computers to understand how complex they really are. I have written operating systems from scratch, I have soldered together small motherboards under a microscope that I designed and designed the logic in the chips myself. I am truly NOT a computer expert. I am however quite skilled with them.

NEVER trust a computer expert! They'll probably charge you a fortune and make things worse then when you started.

What is circular queue .operations circular queue.?

Queue is difined as a special type of data structure .where elements are inserted one end &elements are deleted same end .The end from where they elements are inserted is called as "Rear end".The end from where elements are deleted is called "Front end".

A linear queue is akin to the queue at the post office: it can be envisioned to be linear in space, and limited in space. When a linear queue of finite capacity is full, new arrivals are turned away (elements cannot be added, post office customers walk away).

A circular queue behaves just like a normal queue, but is typically implemented in a a structure akin to a circle. The typical behavior is that the circular queue, when full, does not turn new entries away, but makes space by removing the oldest element in the queue.

Of course, a queue might also be implemented to be of infinite, or virtually infinite, capacity.

What do you mean by conditional expression?

A conditional expression means 'do something only if certain conditions are met'. For example, consider this short BASIC program...

10 a=0

20 b=a+1

30 PRINT b

40 GOTO 20

Will produce every number unless the break key is pressed. However, changing line 30 to a conditional expression, as in this program...

10 a=0

20 b=a+1

30 IF b/10=INT (b/10) THEN PRINT b

40 GOTO 20

Would only display a value every time the condition in line 30 is met. It still adds 1 to b every time it loops round, but would display only the numbers that divide exactly by 10.

Define Hypertext Transfer Protocol?

Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information systems.[1] Its use for retrieving inter-linked resources, called hypertext documents, led to the establishment of the World Wide Web in 1990 by English physicist Tim Berners-Lee. There are two major versions, HTTP/1.0 that uses a separate connection for every document and HTTP/1.1 that can reuse the same connection to download, for instance, images for the just served page. Hence HTTP/1.1 may be faster as it takes time to set up such connections.

--From Wikipedia

Write an algorithm to check whether a number is a prime number or not?

You can write out this algorithm. This will then be programmed into the device to make determining prime numbers easier.

What is joint command post?

A joint command post is a post from which different groups are directed. It usually is a post manned by the leaders of different sections of the armed forces, or by leaders of armed forces of different countries.

How do you write c program using command line arguments for adding two numbers?

#include<stdio.h>

#include<process.h>

#include<stdlib.h>

void main(int argc, char *argv[])

{

int i,result=0;

if(argc<3)

{

puts("Enter atleast two numbers!!");

exit(1);

}

else

{

for(i=0;i<argc;i++)

result+=atoi(argv[i]);

}

printf("Result is %d",result);

}

Where is the backspace key located on my computer?

A large, double-width key usually with the word "backspace" written on it but some keyboards denote with a long left-facing arrow. It is usually found at the top-right of the primary (alphanumeric) keys, on the same row as the digits, above the enter/return key and below the F12 key.

Where is the origin on a Lua program window or what quadrant of the coordinate plane is the window in?

It rather depends on the operating system. In Windows, for instance, the "global" origin is at top left (thus the Windows desktop represents the lower-right quadrant of the global coordinate plane). On the Mac, however, the global origin is at bottom left (thus the Mac desktop represents the upper-right quadrant).

However, in multi-monitor setups where the desktop extends onto other monitors (vertically, horizontally or both), only one monitor can hold the global origin, while all others are offset from this according to their specific arrangement within the matrix and their respective resolutions. However, the operating system ultimately decides where the origin will be placed once you've finished arranging your monitor layout within your multi-monitor control software.

The best way to locate the global origin is to simply draw a window at position 0, 0 with width and height 200. The window will appear upon the monitor that holds the origin, either at the top-left or bottom-right, thus denoting the global origin.

List all 43 presidents with their countries names2013?

If you go to Wikipedia and type "List of heads of state", you'll find a list of current heads of state (and heads of government, when they are not the same person). I'll leave it to you to check which of these qualify as "presidents".

How do you write machine code symbolic instruction?

Machine code symbolic instructions are typically written in the machines assembly language. It must be written line by line to direct the system to perform specific tasks.

How do you use ai in a sentence?

A.I. refers to Artificial Intelligence. You would use this as an improper noun.

Example: The A.I. easily won a game of chess while plotting to take over the world.

How the wrong software process model will affect the software failure?

When you create a software you create a model or psuedocode then a flowchart for the preocess which can be called as Process Model then execution of the Software. If you have made the model correclty minimal issue wil be found during beta testing and perhaps common issue and every problem are possible to fix since you know where in the process model causes the problem. Process model can really affect the software if we did not implement and go throurh a series of testing.

What is the difference between stress testing performance testing and load testing?

Let me explain with an example.

Yahoo has a website. We know that million of people are going to access this site every day. In fact thousands will be clicking this website at same movement of time.

But Yahoo has limited hardware capability. Now they want to know how many people can access their website (hitting their servers) at the same time.

1. Load testing - is expected rate is matched? Yahoo estimated that a maximum of 90,000 people (example) can hit at any point of time. So load testing is performed that whether with 90,000 virtual users system is performing well or not?

2. Stress testing - if we slowly increase users from 90,000 to say 91,000 then to 92,000 then to 93,000 and so on...then at what time servers crash or site stopped responding?

3. Performance testing - Suppose with one user yahoo page opens in 1 sec. Then with 1000 users is it opening in 1 sec? then with 50,000 users hitting website at same time, is it opening in 1 sec....so what is performance of website up to a desired level? (up to 90,000 in this example)

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Above are good differences. I got clear 10 differences between load and stress testing with example

conceptsimplified.com/compare/load-stress-testing/