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3 years ago

What are the advantages of repeating a header row? check all that apply

Computers and Technology

1 answer:

saveliy_v [14]3 years ago

7 0

Edits made to the header row content will automatically be applied to all pages.

You can add and delete rows from the table without moving the header rows.

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onsider a file system on a disk that has both logical and physical block sizes of 512 bytes. assume that the information about e

anygoal [31]

For three disk allocation strategies (contiguous, linked, and indexed),

in this case, the physical blocks must be read from the disk are 1,4 and 2 respectively.

In the disk, every block has a sequential number. The majority of disks today do logical I/O in hardware. Physical I/O is seldom ever required of operating systems today.

File access uses virtual I/O. Similar to disk logical I/O is disk virtual I/O. The distinction is that with virtual I/O, as opposed to physical I/O, the blocks that make up a file are

You could want to transfer from virtual block 10 to virtual block 4 in a contiguous allocation. Since the file is contiguous and you are at logical block 10 + Z, block four can be accessed by reading logical block 4 + Z. Without any intermediaries, that can be done directly.

Each block in the linked structure has 511 bytes of data and one byte that serves as an offset to the following block.

Read the first block, determine the offset to the second block, read the second block, determine the offset to the fourth block, and then read the fourth block in order to gain access to the fourth block.

If blocks are numbered from 1 to 10, then then is the "4" correct. The remainder of the solutions, however, make the assumption that block numbering begins at 0, using division to obtain offsets.

Assume there is a contiguous index for the indexed way of allocating files. Once more, it is assumed that each offset in the index is one byte in size.

Let's say that Z serves as the index's origin. Then, the byte at block Z + 3 DIV 512 and the offset at 3 MOD 512 (3 = 4 - 1) make up the entry for block 4 (numbered 1 to 4).

You must read the index and the data block in order to locate the block (2 reads).

To learn more about disk allocation strategies click here:

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4 0

1 year ago

To assign the contents of one array to another, you must use ________.

iren [92.7K]

Answer:

Option c is the correct answer for the above question.

Explanation:

The array is used to holds multiple variables and the assignment operator can assign only a single variable at a time. So if a user wants to assign the whole array value into other array value then he needs to follow the loop.
The loop iteration moves on equal to the size of the array. It is because the array value moves into another array in one by one. It means the single value can move in a single time. So the moving processor from one array to another array takes n times if the first array size is n.
The above question asked about the processor to move the element from one array to another and the processor is a loop because the loop can execute a single statement into n times. So the C option is correct while the other is not because--

Option 'a' states about one assignment operator which is used for the one value only.
Option b states about the equality operator which is used to compare two values at a time.
Option d states any of these but only option c is the correct answer.
Option 'e' states none of these but option c is the correct.

8 0

3 years ago

What is the characteristics of a spear phishing message

Cerrena [4.2K]

It is targeted at one person specifically. More work for the attacker, but higher chances of obtaining sensitive information.

7 0

3 years ago

Read 2 more answers

A(n) ____ algorithm is a set of specific, sequential steps that describe in natural language exactly what a computer program mus

Paul [167]

<span>The answer is algorithm, because computer programmers need a programming language that's more similar to their native language. They then write specific steps a computer must take to complete the task at hand. Machine code is not easily memorized and is foreign to most people.</span>

8 0

3 years ago

) For a course with n students, an n X 3 array, int[][] arr, holds scores on 3 exams. Each row holds the exam scores for one stu

anzhelika [568]

Answer:

Following are the code to this question:

import java.util.*;//import package

public class Main //defining a class

{

public static void main(String[] ax)//defining main method

{

int student[][] = {{50,60,65},{75,85,90}}; //defining double array student

int Row=0,Col=0;//defining integer variable

double x;//defining double variable

for (int a = 0; a <student.length; a++)//use for loop to holding row value

{

for (int b = 0; b<student[a].length; b++)//use for loop to holding column value

{

Row += student[a][b];//add row value

Col += student[0][b];//add column value

}

System.out.println(x=Row/2);//dividing value and calculating average value

}

Output:

212.0

Explanation:

In the above code, a 2D array student is declared, that holds some value in the next step, two integer variable "Row and Col", is declared, which it uses the for loop to add value in "Row and Col", and in the next step, a double variable x is declared, that add value and calculates its average value and store its value in x variable and print its value.

7 0

3 years ago