C

Question 1

What is an int and how many bytes does it have

Answer 1

An int is a integer data type used for variables, and it has 4 bytes

Question 2

What is an unsigned int and how does it relate to regular int?

Answer 2

It is a qualifier that doubles the positive values available for int data types and removes the negative values.

Question 3

What is a char and how many bytes does it include?

Answer 3

Char is a character data type that includes up to 8 bits or 1 byte and stores a single character

Question 4

What is ASKI and how does it relate to char?

Answer 4

ASKI is a that tells what number related to what character

Question 5

What is a float and how many bytes does it take up?

Answer 5

A float is a decimal or floating data types in variables. Additionally, they take up 8 bytes or 64 bits. These are considered real numbers and allow for more precise numbers.

Question 6

What is void?

Answer 6

Void is a type rather than a data type and can be used as a place holder. If used as a return value, it does not return anything. Void can also be used as a function argument.

Question 7

What is bool?

Answer 7

include<cs50.h> to include bool type variables in C.</cs50.h>

A boolean value data type that can hold either true or false.

Question 8

What is string

Answer 8

include <cs50.h> to utilize string types in C</cs50.h>

String is a text data type that includes characters.

Question 9

What are structs and typedefs?

Answer 9

They allow you to create your own data types and will be discussed later in the course.

Question 10

How do you define a variable?

Answer 10

Nude the data type and the variable name, ending in a semi-colon.

Question 11

Can you define multiple variables on the same line, and if so, how?

Answer 11

Yes, integers of the same type can be defined on the same line with their names separated by commas.

Question 12

What is one good design tip for defining variables?

Answer 12

Oy define them when you need them.

Question 13

How do you use variables in your code?

Answer 13

Include the variable name, the assign operator, and the value, followed by a semi-colon.

Question 14

What is the assign operator?

Answer 14

The equal sign

Question 15

What are the arithmetic operators in C?

Answer 15

+, -, *, and /

Additionally, the modulus operator is %

Question 16

How can an operator be used with a variable and assign operator?

Answer 16

They can be placed before the assign operator to add, subtract, multiply, or decide that variable by the number that follows, or add ++ or - - after the variable to do the same thing for those two operators

Question 17

For a boolean variable, what values equal true and false?

Answer 17

0 equals false and all other numbers equal true.

Question 18

What are boolean expressions?

Answer 18

And, or, and not are logical operators and are used in boolean expressions to compare information.

Question 19

What is the or operator and when is it true?

Answer 19

|| and it is true when one or both are true.

Question 20

What is the and operator and when is it true?

Answer 20

&& and it is true when all are true.

Question 21

What is the not operator and when is it true?

Answer 21

! And it is true when x is false

Question 22

What are relational operators and how are they used?

Answer 22

Relational operators are <, >, =, <=, >=, != and they are used to compare data.

Question 23

What is the switch loop?

Answer 23

A loop with cases

Question 24

What does a do while loop do?

Answer 24

It runs one time before checking the conditional.

Question 25

What does the for loop do?

Answer 25

Repeat a specified amount of times

Question 26

What is a GUI?

Answer 26

It is a graphical user interface

Question 27

What is the Ls command and what does it do?

Answer 27

This list command. It lists the contents of the current directory

Question 28

What is cd and what does it do?

Answer 28

Cd is current directory and it changes the current directory to the directory you specify using cd directory

The current directory is represented by a single period and the parent directory is represented by a two periods

Question 29

What is pwd and what does it do?

Answer 29

It is the print working directory and it allows you to determine the name of the present directory.

Question 30

What does Ctrl l do?

Answer 30

Clears the terminal screen

Question 31

What is mkdir and what does it do?

Answer 31

It creates a new directory

Question 32

What is cp and what does it do?

Answer 32

Cp is the copy command and it copies the following file to the following new file

(cp oldFileName newFileName)

Question 33

What does -r do?

Answer 33

Following cp, it copies an entire directory

Question 34

What does rm mean and what does it do?

Answer 34

Rm is remove and it deletes the following file

Question 35

What is -f and what does it do?

Answer 35

It is force and following rm, it does not check that you want to remove a file

Question 36

What is mv and what does it do?

Answer 36

It moves a file/changes it’s name rather than copying it and removing the original

Question 37

Scope

Answer 37

Inside current curly braces