E115 Midterm Review

In regards to Unity IDs at NC State, match whether the concept is a Rule or an Exception:

Short last names

First name initial

Common last names

Middle name initial

No middle name

First six letters of last name

- Exception

- Rule

- Exception

- Rule

- Exception

- Rule

NC State students must be enrolled in 2 factor authentication to secure their accounts.

True

False

True

If you forget your password, you can simply reset it via an online system.

True

False

True

Software you must purchase before using

Buyware

Software distributed for a multitude of users

Network

Software distributed free of charge

Freeware

Software distributed with a limited license

Shareware

Consider a computer that only has a Graphical user interface. How would this computer receive input?

Keyboard and mouse click

What is the correct order of the following user interfaces from the earliest to the most current?

CLI, TUI, GUI

A Unity ID must always have a number.

True

False

False

A Unity ID can never have a number.

True

False

False

Which of the following can be an element of someone's Unity ID?

a.None of these

b.A middle initial

c.All of these

d.The first six letters of their last name

e.A first initial

c. All of these

Your Unity ID is also the first part of your NCSU email address.

True

False

True

Open source software would fall under which software license, which allows the user to use the full software as they see fit without purchasing it?

Freeware

Which is a type of software license?

a.Buyware

b.All of these

c.Network License

d.Shareware

e.Freeware

b. all of these

Under which of the following would a distribution of Ubuntu Linux fall under?

a.Network

b.Buyware

c.Shareware

d.None of these

e.Freeware

e. Freeware

What is keylogging?

Capturing keystrokes to steal credentials

As an NCSU student, having antivirus software is optional.

True

False

False

Which of the following would help you defend against phishing?

a.

using the same password for all accounts

b.

sharing passwords

c.

using short passwords

d.

checking the URL of a website

d. checking the URL of a website

What is the most appropriate way to address your college instructor in an email, if they have not told you to call them something else?

Professor

According to the E 115 textbook, what are methods to backup files?

NFS space, CD's, Internet Storage, External Hard Drive

According to the E 115 textbook, what should you backup?

Legal Music, School Assignments, Pictures,E-mail

An Operating System manages hardware resources, provides a user interface, and allows the execution of application software.

True

False

True

common Operating System for "general-purpose" computers such as desktops and laptops

Linux

Mac OS X

Windows

Not all programs and processes are small enough to fit the physical memory, so in some cases the memory management system must also provide virtual memory.

True

False

True

The Kernel is responsible for handling interfaces, the file system, process management, scheduling, and memory management.

True

False

True

What is the correct order of the layers of software from closest to the user to closest to the hardware?

Applications, Kernel, Drivers, Hardware

What term is used to identify the process in which certain programs have priority for the processor, in other words, sets up a queue?

Scheduling

What does API stand for?

Application Programming Interface

On July 19, 2024, the company Crowdstrike pushed faulty code to many computers worldwide, pulling them into an infinite cycle of rebooting. Where did this code have to run to cause the entire computer system to break down, instead of just a single program crashing?

Kernel

The abstraction that the kernel provides for application developers is called the _________?

System call API

NIX (Linux and Unix) operating systems historically have what type of interaction with the user?

Command Line

Android is a type of Operating System.

True

False

True

What does GUI stand for?

Graphical User Interface

Microsoft Windows 10 provides what kind of interaction with the user?

Hybrid

Which is an example of an operating system with only command line interface?

MS-DOS

What is the software that allows the operating system to communicate with hardware devices like printers, graphics cards, and network adapters?

Device driver

A printer device driver allows a word processing application to send a print job to a printer. The device driver is a piece of hardware that sits in between the printer and the word processing application.

True

False

False

An absolute path in the NFS file tree always starts from....

The root

Relative pathnames describe how to navigate from your current location to a new location.

True

False

True

Which command would you use to make your current working directory the E 115 course locker?

a. mv E115

b. cd e115

c. None of these

d.

mv /mnt/coe/workspace/csc/admin/e115

e. cd/mnt/coe/workspace/csc/admin/e115

e

The ls command (with -a option) provides output.

True

False

True

The proper syntax for the mkdir command is _____

mkdir directory

The copy command provides output.

True

False

False

You are currently located in the E 115 course locker and inside this directory there is a file called play.txt. How would you move this file to your home directory?

I cannot move that file. You cannot move any files from the E 115 course locker

The proper (full) syntax for the script command is _____

script -options filename.extension

PWD Command

pwd stands for Print Working Directory. This command lets you see at which directory you're currently in. It outputs the absolute pathname of the current directory.

- Type pwd in the terminal and it outputs the absolute pathname to your home directory.

LS Command

This command is used to list all the contents of a directory. If you only type ls in the command line and press enter, you will see the contents of the directory that you're currently in. You can also type ls [pathname] to see the contents of a specific directory.

- If you type ls ~ and press enter, this gives us all the contents of our home directory. If your home directory looks barren, don't worry as you may not have worked in it before.

MKDIR Command

This command allows you to create a directory based on the name and pathname you specified. For this course, you are required to create a MyE115 folder in your home directory. To do this, type:

mkdir MyE115

You can use the ls command to check if the directory was created.

CD Command

cd stands for change directory. This command allows you to move around within NCSU drive into different directories. To move into the newly created MyE115 directory, type:

cd MyE115

It will not give any output, but you can use the pwd command to check your current directory.

CP Command

The copy command allows you to copy items from a specified location to another specified location. The -r option allows you to copy a directory. For this assignment, we will be copying one file. To copy the downloads directory to the MyE115 directory and rename it, type:

cp -r downloads MyE115/copyOfDownloads

You can use the ls command to check if the copying was successful.

MV Command

The move command is similar to the copy command but it deletes the items specified in the source. To rename the copyOfDownloads directory, type:

mv MyE115/copyOfDownloads MyE115/downloadsCopy

You can use the ls command to check if the renaming was successful.

RM Command

his command allows you to remove files or directories. The -r option allows you to remove directories and -f removes items without confirmation. To remove the downloadsCopy directory, type:

rm -rf MyE115/downloadsCopy

You can use the ls command to check if the removal was successful.

MAN Command

If you want to know more about a command, like rm, you need to use man.

Type man rm to learn more about

What is inside the root?

directories

/

root directory

~

home directory

.

current working directory

..

Parent of current working directory

options for ls

-1 = long listing, shows all files including hidden ones

-lrt = above, but sorted by time

-a = shows files in long format

* expect output (contents of directory)

What command makes a new directory?

mkdir

options for rm

rm(deletes file with that name) or rm -f (removes everything in temporary directory)

Options for script?

-a (appends a log file)

-f (flushed, writes to the file in real time and always use this)

* expect an output

Is there an output for man command?

yes

Is there an output for pwd?

yes (absolute pathname)

Used for determining the users location in file tree

~/

home directory

ls -a ~/

ls -l ~/

ls -al ~/

- all files in home directory

- info on files in home directory

- all files in home directory with details

mkdir ~/MyE115

creates directory named MyE115 in my home directory

*

wildcard, matches anything

for 0 or more repetitions

Ex: grep "colou*r" color.txt

?

wildcard, matches any one character

!

history substitution, do not use

&

run a job in the background, or redirect errors

grep

global regular expression print

- text editor search command

Adding up selected values in excel

=SUM(range)

Finds average of selected values

=AVERAGE(range)

Smallest value in range

=MIN(range)

Largest value in range

=MAX(range)

Number of cells in a range (only with numerical data)

COUNT(range)

Number of cells in a range (with names of a country lets say)

COUNTA(range)

Syntax for if statement

=IF(condition, "value if true", "value if false")

* Condition can be =,>,<,>=,<=.

Nested IF statement

=IF(condition 1, "value if C1 is true",IF(condition 2, "value if C2 is true","if nothing is true))

Count IF statement

=COUNTIF(range, condition)

Sum If statement

=SUMIF(A1:A150, ">18",G1:G150)

And statement

=AND(A1="Thursday",B1="rainy")

Or statement

=OR(A1="H",B1="sunny")

To gray out every other row in a data table:

mod(row(),2)=1