Which disk tool can be run on a magnetic hard drive to identify any critical errors on the drive?

What is MS Paint ?<br><img src="https://tex.z-dn.net/?f=%20computer" id="TexFormula1" title=" computer" alt=" computer" align="a

nignag [31]

Answer:

Microsoft Paint, also known as Paint, is a simple program that allows users to create basic graphic art on a computer. Included with every version of Microsoft Windows since its inception. Paint provides basic functionality for drawing and painting in color or black and white, and shaped stencils and cured line tools.

4 0

2 years ago

What is the importance of data validation, and how can user data entry errors be reduced or eliminated?

lisabon 2012 [21]

Incorrect data can lead to unexpected program execution results. Data entry errors can be reduced by only accepting valid input, e.g., if a number must be entered, alphabetic characters are ignored. After data validation, error messages can be prompted to the user, requiring him to enter the data again.

5 0

3 years ago

We have said that the average number of comparisons need to find a target value in an n-element list using sequential search is

bija089 [108]

Answer:

Part a: If the list contains n elements (where n is odd) the middle term is at index (n-1)/2 and the number of comparisons are (n+1)/2.

Part b: If the list contains n elements (where n is even) the middle terms are at index (n-2)/2 & n/2 and the number of comparisons are (n+2)/2.

Part c: The average number of comparisons for a list bearing n elements is 2n+3/4 comparisons.

Explanation:

Suppose the list is such that the starting index is 0.

Part a

If list has 15 elements, the middle item would be given at 7th index i.e.

there are 7 indices(0,1,2,3,4,5,6) below it and 7 indices(8,9,10,11,12,13,14) above it. It will have to run 8 comparisons to find the middle term.

If list has 17 elements, the middle item would be given at 8th index i.e.

there are 8 indices(0,1,2,3,4,5,6,7) below it and 8 indices(9,10,11,12,13,14,15,16) above it.It will have to run 9 comparisons to find the middle term.

If list has 21 elements, the middle item would be given at 10th index i.e.

there are 10 indices (0,1,2,3,4,5,6,7,8,9) below it and 10 indices (11,12,13,14,15,16,17,18,19,20) above it.It will have to run 11 comparisons to find the middle term.

Now this indicates that if the list contains n elements (where n is odd) the middle term is at index (n-1)/2 and the number of comparisons are (n+1)/2.

Part b

If list has 16 elements, there are two middle terms as one at would be at 7th index and the one at 8th index .There are 7 indices(0,1,2,3,4,5,6) below it and 7 indices(9,10,11,12,13,14,15) above it. It will have to run 9 comparisons to find the middle terms.

If list has 18 elements, there are two middle terms as one at would be at 8th index and the one at 9th index .There are 8 indices(0,1,2,3,4,5,6,7) below it and 8 indices(10,11,12,13,14,15,16,17) above it. It will have to run 10 comparisons to find the middle terms.

If list has 20 elements, there are two middle terms as one at would be at 9th index and the one at 10th index .There are 9 indices(0,1,2,3,4,5,6,7,8) below it and 9 indices(11,12,13,14,15,16,17,18,19) above it. It will have to run 11 comparisons to find the middle terms.

Now this indicates that if the list contains n elements (where n is even) the middle terms are at index (n-2)/2 & n/2 and the number of comparisons are (n+2)/2.

Part c

So the average number of comparisons is given as

((n+1)/2+(n+2)/2)/2=(2n+3)/4

So the average number of comparisons for a list bearing n elements is 2n+3/4 comparisons.

6 0

3 years ago

Which of the following identifies a user based on anatomical characteristics such as a fingerprint, a voice print, or iris patte

antiseptic1488 [7]

Answer:

Biometrics

Explanation:

Biometrics is the techniques that is used to measure and identify different characteristic of human being that are usually unique in nature for individuals such as voice characteristics, eye retina and finger prints. These features are unique for every person. These features could be used for different purposes now a day such biometric identification, biometric verification and for forensic purposes.

There are different algorithms to compute and compare these unique characteristics for each user and store in a database for the purpose of identification of the users. This data can also be used for forensic purpose if needed by some security agency to identify some person.

The type of identification in which these features such as voice, finger prints and iris pattern use is called biometrics.

3 0

3 years ago

What is a hacker who breaks into other people's computer systems and may just look around or steal and destroy?

inessss [21]

A cyber gang or cyber theif

5 0

3 years ago

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