1,518 Answered Questions for the topic computer science

Computer Science

05/19/19

What exactly is polynomial time?
I'm trying to understand algorithm complexity, and a lot of algorithms are classified as polynomial. I couldn't find an exact definition anywhere. I assume it is the complexity that is not... more
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Computer Science Networking (computer)

05/16/19

Why is the fourth IPv6 address invalid?

Q) Which of the following IPv6 addresses is invalid? 21E5:69AA:FFFF:1:E100:B691:1285:F56E ::255.255.255.255 59FB::1005:CC57:6571 56FE::2159:5BBC::6594 [Q2bi 9608/11 Oct/Nov 2018] According to the... more
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Computer Science

05/08/19

Difference between a turing machine and a finite state machine?
I am doing a presentation about Turing machines and I wanted to give some background on FSM's before introducing Turing Machines. Problem is, I really don't know what is VERY different from one... more
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Computer Science

05/05/19

What is the meaning of O(m+n)?
This is a basic question, but I'm thinking that O(m+n) is the same as O(max(m,n)), since the larger term should dominate as we go to infinity? Also, that would be different from O(min(m,n)). Is... more
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Computer Science

05/04/19

Why is cache memory divided into different levels, but RAM is not?
In all computer architecture books we study that Cache memory could be divided into 3 levels (L1,L2 and L3) and its very beneficial to do so. Why don't we use the same approach in case of main... more
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Computer Science

04/29/19

What is the significance of reverse polish notation?
I teach computing to 18 year olds. After having reverse polish notation explained to them one asked why is it significant enough to be in the public exam. I explained the historical significance of... more
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Computer Science Javascript Webgl 3d Graphics

04/29/19

WebGL JavaScript 3D Object

I am trying to render a 3D object using WebGL and Javascript and Right now I am getting an error. "test.js:123 Uncaught DOMException: Failed to execute 'texImage2D' on 'WebGL2RenderingContext': The... more
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Computer Science

04/28/19

Find median of unsorted array in $O(n)$ time?
To find the median of an unsorted array, we can make a min-heap in O(n log n) time for n elements, and then we can extract one by one n/2 elements to get the median. But this approach would take... more
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Computer Science

04/28/19

What is a microcontroller?
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Computer Science Software Testing

04/26/19

challenges in software development
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Computer Science Prealgebra Prime Factorization

04/24/19

fastest method to determine if two numbers are coprime?
I am working on a mathematical problem that involves coprime integers. I wrote a computer program that allows me to search for the numbers I am looking for. However I am looking at a large set of... more
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Computer Science

04/23/19

Why is selection sort faster than bubble sort?
[It is written on Wikipedia](http://en.wikipedia.org/wiki/Selection_sort#Comparison_to_other_sorting_algorithms) that "... selection sort almost always outperforms bubble sort and gnome sort." Can... more
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Computer Science

04/21/19

Minimum spanning tree vs Shortest path?
What is the difference between minimum spanning tree algorithm and a shortest path algorithm?In my data structures class we covered two minimum spanning tree algorithms (Prim's and Kruskal's) and... more
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Computer Science

04/20/19

Why an ARM processor with 32 bits address bus can address 4 billion different bytes?
Why an ARM processor with 32 bits address bus can address 4 billion different bytes? I know that 2^32 is equal to about 4 billions, but shouldn't it be 4 billion bits and not bytes? Hence if I want... more
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04/20/19

Can I use the sealed TOEFL score report I receive from ETS as an official score report?
ETS sends a score report to me after each TOEFL exam in a sealed envelope. And since I already have online access to my scores, I would like to know if I can use the sealed score report as an... more
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Computer Science

04/17/19

Compound Boolean Expressions
Given the following Boolean expression, with numerical variables x and y, answer the questions below.x == 9 && y != 9
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Computer Science

04/13/19

What is the difference between MIS, CS, and IT?
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Computer Science

04/12/19

How do I count the exact number of executed commands for a MIPS program?
I want to know what the best way is to count the number of executed commands for a given MIPS program. What is the correct procedure for counting the number of executed commands?
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Computer Science Science Chemistry Physics

04/12/19

How big is an atom?
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Computer Science

04/12/19

What is the difference between variables and pointers?
Whist reading an article outlining differences in [OO and Functional programming](http://blog.cleancoder.com/uncle-bob/2014/11/24/FPvsOO.html) I came across function pointers. It has been a while... more
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Computer Science

04/10/19

Computer Science - Raptor Programming - Sorting Problem
Given the text file grades.txt containing student names, their school names and marks respectively, use Raptor to develop an algorithm to sort the marks in decreasing values. Note the format of the... more
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Computer Science Science Act Science

04/06/19

What type of scientific model is this?
Consider the scenario.Scientists have developed a computer program that can be used to predict when volcanoes will erupt.What type of scientific model is this?1) practical model2) conceptual... more
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04/05/19

Which type of scientific reasoning is being described in the situation?
Consider the situation.Scientists discovered a sedimentary layer of earth with high amounts of the element iridium. This layer was laid down about the time at which the dinosaurs went extinct.... more
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Computer Science

04/04/19

What is output by the code below?
int a = 75, b = 100;if( a > 90)  if( b > 100)     out.print("go");  else if( b > 90)     out.print("it");  else     out.print("up");out.print("on");
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Computer Science

04/04/19

Writing an algorithm in pseudocode?
Write an algorithm, using pseudocode, to input 3 different numbers, multiply the 2 larger numbers together and output the result. Use the variables: Number 1, Number 2 and Number 3 for your numbers... more
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