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Computer Science

Computer Science is the systematic study of algorithmic processes that describe and transform information. It includes the theoretical foundations of information and computation and the practical techniques of applying those foundations to computer systems. Among the many subfields of Computer Science are computer graphics, computer programming, computational complexity theory, and human-computer interaction. Questions about Computer Science, terms such as algorithms and proofs, and methodologies are encouraged in this category.

1,839 Questions

1234 x 4567 by divide and conquer method?

In the case of multiplying 1234 by 4567, the divide and conquer method is no more than what you would do to multiply them on a piece of paper.

Start with 4 x 7, giving 28.
Continue with 4 x 6, giving 24, shifted left to give 240, and then added to 28.
... and etc.

In the end, you have multiplied 16 times, and added the partial products together to get a final result.

Can you install mac os in Lenovo z570?

i think ....

it's only able to install only on Apple products!

If you need , you can install it through VirtualBox!

Layered view of a computer system?

it includes computer h/w,os,utility programs,assembly&hl languages,application programs.

Importance of automata as a computer science student?

Automata, and the related concept of formal languages, is the core of theoretical computer science. They are where the notion of run-time complexity comes from, and are absolutely central to a complete understanding of algorithm design and optimization. While you can (and many people do) write programs without understanding automata and algorithm design, a solid understanding of them both will make you a much better programmer, and save you a lot of time and trouble when you try to work out how to make something run faster.

Is computer a thinking machine?

It would be more accurate to call it a calculating machine. Thinking, so far as is understood, is considered a biological trait.

Is a 2-to-1 mux functionally complete?

Yes.

AND operation

= f(A,B) = AB = A'f(0,B) + Af(1,B)

= A'(0B) + A(1B) = A'0 + AB

OR operation

- f(A,B) = A+B = A'f(0,B) + Af(1,B)

= A'(0+B) + A(1+B) = A'B + A1

NOT operation

- f(A) = A' = A'f(0) + Af(1)

= A'(1) + A(0)

Btech chemical under distance jrn rvd university deemed aicte ugc dec approved not?

This question can best be answered by the university itself. All you have to do is make an Indian Postal Order of Rs.10/- in favour of IPO / Registrar JNR RVD University Pratapnagar, Udaipur (Rajasthan) and send this alongwith letter in which you ask the same question and any other relevant information under Right to Information Act. The university has to reply to you with in 30 days. I am sure you will get the best possible information on the issue.

What the difference among direct mapping associative mapping and autoassociative mapping?

Direct mapping

A given Main Memory block can be mapped to one and only one Cache Memory line.

It is Simple, Inexpensive, fast

It lacks mapping flexibility

Associative mapping

A block in the Main Memory can be mapped to any line in the Cache Memory available (not already occupied)

It is slow, expensive

It has mapping flexibility

What are The 6 objectives of mis?

Objectives of MIS

· How is the market currently allocated? · Which are the competitors product offer to hold share in the market? · Pros and cons of this product · Customer set of each of these products · Money spent in advertising · In what stage of the product life cycle in each product Objectives of MIS · How is the market currently allocated? · Which are the competitors product offer to hold share in the market? · Pros and cons of this product · Customer set of each of these products · Money spent in advertising · In what stage of the product life cycle in each product

Computer science vs computer engineering?

Bachelor of Computer Science is a type of bachelor's degree, usually awarded after three years of collegiate study in computer science. In general Computer Science degrees emphasize the mathematical and theoretical foundations of computing, rather than teaching specific technologies that may quickly become outdated. A Bachelor of Computer Science degree is normally required in order to work in the field of software development.

Bachelor of Engineering is an undergraduate academic degree awarded to a student after three to five years of studying engineering. The nature of the qualification varies around the world so, hence it may or may not be a professional degree and it may or may not involve undertaking some engineering work. The course may or may not be accredited by a national professional society.

What is a boolean theorem?

In The Middle Of 19th Century ,an English mathematician George Boole developed rules for manipulations of binary variables, known as Boolean Algebra. This is the basis of all digital systems like computers, calculators etc. 0and 0=0 0 and 1=0 1 and 0=0 1 and 1=1.

He did not develop his Boolean Algebra until he became a professor in Ireland. (Cork I think.)

There is a well developed article in wikipedia.org.

What is lexical analysis?

A compiler is usually divided into different phases. The input to the compiler is the source program and the output is a target program.

Lexical analyzer is the first phase of a compiler which gets source program as input. It scans the source program from left to right and produces tokens as output. A token can be seen as a sequence of characters having a collective meaning.

Lexical analyzer also called by names like scanner, linear analyzer etc.

What is lazy initialization?

Lazy initialization is a process by which an object is not initialized until it is first called in your code. The .NET 4.0 introduces a new wrapper class, System.Lazy<T>, for executing the lazy initialization in your application. Lazy initialization helps you to reduce the wastage of resources and memory requirements to improve performance. It also supports thread-safety.

How is the default constructor equivalent to a constructor having default arguments?

Any constructor that can be invoked without explicitly passing any arguments is a default constructor. Note that there can be only one default constructor so there can only be one constructor where all arguments have default values or one constructor that has no arguments, but not both. A constructor where all arguments have default values is a useful means of combining two or more constructors into a single default constructor, thus reducing verbosity and code duplication.

Can a computer program develop the initiative to execute tasks in a better way than its programmers envisioned?

To an extent, yes - and in the future, computer programs might get better at this. An interesting case is the program that beat the Go world champion (Go is a well-known Japanese board game); the program was designed to learn game strategy by playing, and seeing what works and what doesn't; and now, the original programmers have no idea HOW the program determines the best moves!

What does logic mean in computing?

it's a little and basic integrated circuit that makes calculations regarding Boole's logic (true/false)

they can make various operations instantly regarding as the type of logic gate

based on the 2 inputs, giving the result as output.

they can make the OR operand, And, Xor,Not and a combination of them (cheaper) Nor,Nand,XNor

it's the base for digital computing.

Why is Unix called a command interpreter?

Unix and Unix-like systems would be referred to as command interpreters because of the nature of their interface. These systems are interacted with via a shell (i.e. Bash), which is a 'command-line interface' where the user types in text commands and they are executed by the system. This is in contrast with modern operating systems where the primary method of interaction is via a 'graphical user interface' or GUI, where the system is represented with graphics (like windows, cursors, toolbars etc.). These modern OS's still include command-line interfaces, like Command Prompt in Windows and the Terminal in OSX.

What happens when you place an image file in a subdirectory and neglect to reference the subdirectory in the img tags src attribute?

The browser will look for the image file in the wrong place, and you'll most likely get a broken image.

In theory, you could get the wrong image, if an image with the same name were located in the right spot. But that's not likely.

How can you write multiple inheritance program in java?

Java does not support direct multiple inheritance. You can implement partial multiple inheritance using interfaces.

ex:

public class ExMultInherit implements interface1, interface2, interface 3 {

...

....

......

}

Who invented the first learning AI?

The first learning AI (or first publicly shown one) was, in fact, that of the Norns in Creatures series. The inventor of that AI is Steve Grand.