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3 years ago

Which of the following statements about constructors are true? Check all that apply.

Computers and Technology

1 answer:

Neko [114]3 years ago

5 0

Answer:

a. Partly True

b. True

Explanation:

(a) "new" keyword or syntax is used for the constructors while working in Perl and Moose object system for Perl.

For Visual Basics .Net, keyword "New" is used

For Python, "___new___" is used which allocates memory for instance and receives class as an argument.

For Objective-C, "alloc" and "init" are used for constructor method. "alloc" allocates memory for the instance and "init" handles the bulk of initializing the instance. Whereas, the "new" keyword calls both "alloc" and "init" for class instance.

(b) A constructor does not return any value because it is called by the memory allocation and object initialization code in the runtime and not directly by your code.

You might be interested in

Write a method swaparrayends() that swaps the first and last elements of its array parameter. ex: sortarray = {10, 20, 30, 40} b

Alexus [3.1K]

In the C programming language, you can't determine the array size from the parameter, so you have to pass it in as an extra parameter. The solution could be:

#include <stdio.h>

void swaparrayends(int arr[], int nrElements)
{
int temp = arr[0];
arr[0] = arr[nrElements - 1];
arr[nrElements - 1] = temp;
}

void main()
{
int i;
int myArray[] = { 1,2,3,4,5 };
int nrElements = sizeof(myArray) / sizeof(myArray[0]);
swaparrayends(myArray, nrElements);

for (i = 0; i < nrElements; i++)
{
printf("%d ", myArray[i]);
}

getchar();
}

In higher languages like C# it becomes much simpler:

  static void Main(string[] args)
  {
int[] myArray = {1, 2, 3, 4, 5};
swaparrayends(myArray);
foreach (var el in myArray)
{
Console.Write(el + " ");
}

Console.ReadLine();
}

static void swaparrayends(int[] arr)
{
  int temp = arr[0];
arr[0] = arr.Last();
arr[arr.Length - 1] = temp;
}

3 0

3 years ago

How to do this PLEASE HELP 80 points!

sp2606 [1]

When reading the story, you know that the code has been created by humans, so it might actually be english and use concepts like our number system, our computer code system (I'm thinking ASCII), things that you should not assume when decoding a real alien message.

Looking at the numbers I notice that digits 6 to 9 do not occur in the message, which is statistically unexpected. This leads me to believe the number base might be 6 rather than our common base 10. In the story there are insects mentioned. Insects have 6 legs, so this makes sense (after all, our base 10 was based on the number of fingers).

Next, I notice the code 052 appearing regularly, so that could be a space. Let's check a hypothesis. 052 in base 6 is 5*6+2 = 32. 32 is the ASCII code for a space!!

Now, a decoding algorithm is ready to be devised:

"for each number in the sequence, parse it as a base-6 number and then print out its corresponding ASCII value".

The following node.js snippet does this:

var code = ['220','241','255','245','052','313',

'311','052','312','303','052','312',

'252','245','052','205','241','251',

'253','243','052','203','253','302',

'251','244','303','301','053'];

var msg = "";

for (let n of code) {

msg += String.fromCharCode(parseInt(n,6));

}

console.log(msg);

And the message is.........:

<em>Take us to the Magic Kingdom!</em>

So, do these aliens want to visit Disneyland????

5 0

3 years ago

You are writing code to store the length of a side of a square. Which one is a good variable name

solniwko [45]

Answer:

Explanation:

Hi, pooop! i really like your username

In programming we should use camelcase whichLooksLikeThis because the capital letters are kind of like the back of a camel

so perhaps make the variable name:

lengthSquare

it looks like your question has multiple choice answers.. but i cant see them... so i just made up my own answer...

3 0

3 years ago

What type of game is LEAST LIKELY to need a structured narrative?

VladimirAG [237]

Answer:

Probably a sports game

Explanation:

A role-playing means acting it out, so you need to explain the life with a structured narrative.

An adventure game needs lots of background, so you need to fill that in with a structured narrative.

A sports game revolves solely around sports, so you only need to know how to play the game and/or sport, so no structured narrative is needed.

An fps game needs a structured narrative in that it is similar to an adventure game and needs background.

Let me know if I was right! Hope this helped. :)

5 0

3 years ago

Everfi module 7 answers

Nat2105 [25]

What is the question?

7 0

3 years ago