CodeHS is an interactive online learning platform offering computer science and programming instruction for schools and individual learners.
CodeHS is focused on spreading access to and knowledge of computer science by offering online instructional materials supported by remote tutors.
Explanation:
Downloading an image from a website on the internet.
- Right-click the image.
- Choose the command Save Picture As. The command might be different in browsers other than Internet Explorer.
- Use the Save Picture dialog box to find a location to save the picture. You can rename the picture as it's saved to your computer's storage system
- Click the Save button.
Download an image of Karel the dog from the URL
- Create a folder in your laptop
- Place your text file of images URL in the folder.
- cd to that folder.
- Use wget -i images.txt.
- You will find all your downloaded files in the folder.
How your computer finds the CodeHS server, requests information from the server, and receives it.
- When you enter an URL into the address bar of browser, browser will send the domain to a server call DNS to convert the domain into IP address.
- For example: google dot com will be convert into 113.171.253.224
- Next, the browser will send your request to that IP.
- All your sent data will be divided into packages, each package contains your IP address.
- That is the reason why server know who it will send the response.
Answer:
D. Flash the BIOS
Explanation:
The function of the BIOS is to test all computer hardware that is attached to a machine before loading the operating system. Since the bios contains firmware that enables the configuration of computer hardware. when the 2 TB hard drive is connected the technician should update the program stored on the BIOS chip in other words flash the bios for it to be able to read the new hard drive. Reinstalling the drive will not make a difference as long as the BIOS still detects the 250 GB hard drive.
Answer:
The statement is as follows:
cout <<fixed<< setprecision(3) <<sales;
Explanation:
Here, I assume that the variable has already been declared.
The syntax to use is:
cout<<fixed<<setprecision(n)<<variable-name;
In this case:
--- i.e. to 3 decimal places
And the variable name is: sales
So, when implemented, the instruction is:
cout <<fixed<< setprecision(3) <<sales;
Answer:
description=open_file.read(12)
Explanation:
A programming language in computer is a set formal languages that comprises a set of instruction which produce various kinds of output. It is used ti implement algorithms in computer programming.
In the context, description=open_file.read(12) is the statement given to the computer as input which takes a variable named as open_file containing a file object and which reads the next 12 characters into the variable named as description.
Answer:
Hexadecimal numerals are widely used by computer system designers and programmers, as they provide a human-friendly representation of binary-coded values. Each hexadecimal digit represents four binary digits, also known as a nibble, which is half a byte.
Explanation:
