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2 years ago

Which of the following is a sample IPv4 address?

Computers and Technology

1 answer:

const2013 [10]2 years ago

7 0

Answer:

The first one, 99.14.242.51 is the only valid IPv4 address listed.

Explanation:

An IPv4 address is formatted as four eight-bit numbers separated by decimals. This means that a valid one will have four numbers from 0 to 255, with decimals in between.

The first one, 99.14.242.51 is a valid IPv4 address.

The second one has the number 342, which is greater than eight bits.

The third one has five octets.

The fourth one is in the wrong format altogether, using what appear to be 32-bit numbers

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Which of the following statements represents the number of columns in a regular two-dimensional array named values?

puteri [66]

Answer:

(a) values[0].length

Explanation:

In programming languages such as Java, an array is a collection of data of the same type. For example, a and b below are an example of an array.

a = {5, 6, 7, 9}

b = {{2,3,4}, {3,5,4}, {6,8,5}, {1,4,6}}

But while a is a one-dimensional array, b is a regular two-dimensional array. A two-dimensional array is typically an array of one-dimensional arrays.

Now, a few thing to note about a two-dimensional array:

(i) The number of rows in a 2-dimensional array is given by;

arrayname.length

For example, to get the number of rows in array b above, we simply write;

b.length which will give 4

(ii) The number of columns in a 2-dimensional array is given by;

arrayname[0].length

This is with an assumption that all rows have same number of columns.

To get the number of columns in array b above, we simply write;

b[0].length which will give 3

Therefore, for a regular two-dimensional array named values, the number of columns is represented by: values[0].length

5 0

3 years ago

[30 points, will mark Brainliest] Which of the following is the lowest hexadecimal value? Explain why. Options to chose; F2, 81,

larisa86 [58]

Answer:

The answer to this question is given below in the explanation section.

Explanation:

First, we need to convert these hexadecimal numbers into decimal numbers, then we can easily identify which one is the lowest hexadecimal.

The hexadecimal numbers are F2, 81, 3C, and 39.

F2 = (F2)₁₆ = (15 × 16¹) + (2 × 16⁰) = (242)₁₀

81 = (81)₁₆ = (8 × 16¹) + (1 × 16⁰) = (129)₁₀

3C = (3C)₁₆ = (3 × 16¹) + (12 × 16⁰) = (60)₁₀

39 = (39)₁₆ = (3 × 16¹) + (9 × 16⁰) = (57)₁₀

The 39 is the lowest hexadecimal number among the given numbers.

Because 39 hex is equal to 57 decimal.

39 = (39)₁₆ = (3 × 16¹) + (9 × 16⁰) = (57)₁₀

5 0

3 years ago

. Briefly describe an SQL DML statement for changing existing data in a table.

bearhunter [10]

Answer:

The Update statement in the DML is used for changing existing data in a table.

Explanation:

Their are following Sql statement in the DML.

Insert

This SQL statement is used for inserting data into the table.

select

This SQL statement is used for retrieving data from database

update

This SQL statement is used for updating data in a table.

delete

This SQL statement is used for delete data from database .

The "UPDATE" SQL statement in DML is used for Modify the data in the existing table .

Following are the syntax of Update SQL query

Update tablename

set column1=value1,column2=value2............column N=valueN

Where condition;

Example :Suppose we have student table and (rollno,name,age and add) are the field for that table we have to change the address of rollno 105

Then we use update query like that

UPDATE STUDENT

SET add='kalam nagar'

where rollno=105;

8 0

3 years ago

Primary U.S. interstate highways are numbered 1-99. Odd numbers (like the 5 or 95) go north/south, and evens (like the 10 or 90)

yanalaym [24]

Answer:

The solution in python.

Output:

print("0 is not a valid interstate highway number")

Explanation:

h = int(input("enter highway number: ")) #take highway number

if(h>=1 and h<=99): #for primary highway

if(h%2==0):

print("I-%d is primary, going east/west" %h) #for even highway number

else:

print("I-%d is primary, going north/south" %h) #for odd highway number

elif(h>=100 and h<=999): #for auxiliary highway

aux=str(h) #convert into string for fetch the rightmost number

l=len(aux) #find the length

val = aux[l-2]+aux[l-1] #assign value of rightmost two number

h = int(val) #convert into integer

if(h%2==0):

print("I-"+aux+" is auxiliary,"+"serving I-%d, going east/west" %h)

else:

print("I-"+aux+" is auxiliary,"+"serving I-%d, going north/south" %h)

elif(h==0):#for 0 highway number

print("0 is not a valid interstate highway number")

else:

pass

7 0

3 years ago

Why is Apple using social media ?

jeka57 [31]

Apple uses social media to promote their products and increase user-engagement. This is a very effective method of advertising.

6 0

3 years ago