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3 years ago

What is the first computer ever made?????

Computers and Technology

2 answers:

Leviafan [203]3 years ago

6 0

The manchester mark 1

lord [1]3 years ago

3 0

That really depends on your definition of "Computer"!

The first time the word "computer" was used it was referring to a human who performed calculations!!

The first mechanical computer was, created by Charles Babbage in 1822, although it's not a computer like we know it. It was known as the Difference Engine and tabulated polynomial functions.

The first programmable computer was the Z1, created between 1936 and 1938. It was a binary electrically driven mechanical calculator with limited programmability.

The first electric programmable computer was the Collosus in 1943, created to help read encrypted German messages by British code breakers.

The first digital computer used for digital computation such as binary math and boolean logic, was the Atanasoff-Berry Computer in 1937.

The first stored program computer was the EDSAC which work started ib in 1946, but only ran it's first programs in 1949. ran the first graphical computer game as well! The Manchester Mark 1 which the other poster mentioned was created around the same time (work began 1948) and could also run stored programs, but the EDSAC was the first.

The first commercial computer was the Z4 in 1942.

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Liam noticed someone had accessed his social media account and made several posts without his knowledge. Which of the following

jok3333 [9.3K]

Answer:

Liam could

1) Change the password

Be sure to change the password to a "strong" one (containing lots of characters, numbers, symbols) so that way the password would be difficult to guess.

2) Avoid logging onto social media on public computers or WiFi connections.

Using public WiFi leaves you vulnerable to someone accessing your information through Internet traffic. If you do use public computers, just make sure to log out.

3) Avoid giving out account information to friends and avoid opening suspicious links and emails.

Opening suspicious links or emails could allow malware to infect your computer the moment you open them. Friends can unknowingly share these links that are designed to steal information.

I hope this helped <3 please lmk if there's anything more to add.

4 0

3 years ago

should variables that contain numbers always be declared as integer or floating-point data types? why or why not? name potential

Stells [14]

No, it is not necessary that variables that contain numbers should always be declared as integer or floating-point data types.

It is not necessary that variables that contain numbers should be declared as integer and floating point data types. Because number can be declared with different data types. As we know that data type is a vital aspect in programming. It describes the type of a value that is contained in a variable. It is the data type based on which memory is allocated to a number or any type of variables.

Numbers can be whole decimal/fractional, signed, unsigned, small, and long. Simply, they exist in a variety of values. According to their values range, the amount of memory is reserved.

Different programming languages offer different data types to store numbers, depending on their types and size. Let’s consider some examples of data types used in programming languages in order to declare variables holding numbers.

In Python int, float, and complex are the data types used to declare number type variables.

SQL uses INTEGER, SMALLINT , BIGINT , NUMERIC() , and DECIMAL() data types for numbers.

To deal with number type variables, Java has six predefined data types, such as int, long, short, byte, float, and double.

JavaScript uses a single data type called 'number' to declare numbers.

In C++, two fundamental data types, int and float, are used to represent numeric variables. But C++ is not only limited to these two data types. The data type char can also store numbers. Other data types for declaring numbers as variables are derived from int, float and char, such as short int, long int, signed int, unsigned int, double, long double, signed char, unsigned char etc. etc.

So in concluding remarks, declaring a number type variable is not only limited to using integers and floating-points data types. Rather it entirely depends on the respective programming language, and size and type of the number to be stored in the variable.

You can learn more about data types at

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6 0

2 years ago

Case Project 9-4: Troubleshoot an IP configurationYou work at a help desk and have just received a call from an employee who say

Svetllana [295]

Answer:

To get the IP address and other information on the workstation, type 'ipconfig' for windows or 'ifconfig' or Linux and press the return key.

The subnet mask is a class B type and 169.254.14.11 IP address shows that the workstation cannot access the DHCP server, so the IP address is not properly configured for network connection.

Explanation:

A computer network is an interconnection and intercommunication of two or more computer devices. All devices in a network must have an IP address, which can be static or dynamic from a DHCP server.

When a computer is configured to receive IP address from a DHCP server, but cannot reach the server, the IP address from the range of 169 is automatically assigned to it but still would not be able to communicate with other devices in the network.

4 0

2 years ago

maximum cardinality indicates whether or not an instance of one entity class must be related to at least one instance of another

vladimir1956 [14]

This is false.

What is cardinality?

Cardinality refers to the entity instances for which it is eligible to participate in a relationship instance. There are two types of cardinality, maximum and minimum.

What is maximum cardinality?

The maximum cardinality of a relationship is the maximum number of instances of entity B that may be associated with each instance of entity A.
Maximum cardinality: maximum number of entity instances that can participate in a relationship.

One-to-One [1:1]
One-to-Many [1:N]
Many-to-Many [N:M]

To know more about maximum cardinality , refer:

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4 0

1 year ago

What is output? public class MathRecursive { public static void myMathFunction(int a, int r, int counter) { int val; val = a*r;

ycow [4]

Answer:

The output of the program is:

2 4 8 16 32 64 End

Explanation:

See attachment for proper presentation of the program

The program uses recursion to determine its operations and outputs.

The function is defined as: myMathFunction(int a, int r, int counter)

It initially gets the following as its input from the main method

a= 1; r = 2; counter = 0

Its operation goes thus:

val = a*r; 1 * 2 = 2

Print val; Prints 2

if (counter > 4) { System.out.print("End"); } : Not true

else { myMathFunction(val, r, counter + 1); }: True