Binary number and Digital logic (Mira tu libreta y repasa + notes cards)

Question 1

Octal Decimal and Hexadecimal

Answer 1

Octal and Hexadecimal are ways to group bits
together
 Octal: base 8
 Decimal: base 10
 Hexadecimal: base 16

Question 2

Hexadecimal

Answer 2

Symbol
0
1
2
3
4
5
6
7
8
9
a
b
c
d
e
f

Question 3

Hexadecimal to Binary

Answer 3

f0e516 = ? in binary
* Translate each into a group of 4 bits:
f16 => 11112, 016 => 00002, e16 => 11102, 516 => 01012
So this is 11110000111001012

Question 4

What is ASCII?

Answer 4

American Standard Code for Information
Interchange

Use byte values to represent characters

Question 5

Bitwise Logical Operations

Answer 5

binary operations:
◦ NOT
◦ AND
◦ OR
◦ XOR
◦ NAND
◦ NOR

Question 6

NOT

Answer 6

a not(a)
0 1
1 0

Question 7

AND

Answer 7

a b a and b
0 0 0
0 1 0
1 0 0
1 1 1

Question 8

OR

Answer 8

a b a or b
0 0 0
0 1 1
1 0 1
1 1 1

Question 9

XOR

Answer 9

a b a xor b
0 0 0
0 1 1
1 0 1
1 1 0

Question 10

NAND

Answer 10

a b a nand b
0 0 1
0 1 1
1 0 1
1 1 0

Question 11

NOR

Answer 11

a b a nor b
0 0 1
0 1 0
1 0 0
1 1 0

Question 12

Computer architecture
and Operating systems

Answer 12

Von Neuman Architecture (mira note cards)

Question 13

Systems Software

Answer 13

Linux, MacOS, Windows..

Question 14

Functions of the Operating System

Answer 14

Multitasking/multiprogramming
Multithreading
Multiprocessing
Virtual Memory
Graphical user interface (GUI)

Question 15

Processes

Answer 15

A process has a self-contained execution environment. A
process generally has a complete, private set of basic run-time
resources; in particular, each process has its own memory
space.

Question 16

Threads

Answer 16

Threads exist within a process — every process has at least
one. Threads share the process’s resources, including memory
and open files.

Question 17

File Systems

Answer 17

is a type of data store which can be used to store,
retrieve and update a set of files.
 Main types for disk file systems:
◦ FAT (12,16,32, and exFAT)
◦ NTFS
◦ Ex2, ext3, and ext4
◦ HFS Plus

Question 18

What is a memory address?

Answer 18

A number that is assigned to each byte in a computer’s memory that the CPU uses to track where data and instructions are stored in RAM.

Question 19

What’s the difference between Word size versus address size

Answer 19

It denotes the number of bits that a CPU can process at one time.
Word size versus address size

Question 20

What are the functions of an operating systems?

Answer 20

•Multitasking/multiprogramming
•Multithreading
•Multiprocessing
•Virtual Memory
•Graphical user interface (GUI)

Question 21

What is a processes?

Answer 21

◦A process has a self-contained execution environment. A process generally has a complete, private set of basic run-time resources; in particular, each process has its own memory space.

Question 22

What’s is a thread?

Answer 22

Threads exist within a process — every process has at least one. Threads share the process’s resources, including memory and open files. This makes for efficient, but potentially problematic, communication.

Question 23

What’s the difference between processes and threads

Answer 23

Both processes and threads provide an execution environment, but creating a new thread requires fewer resources than creating a new process.

Question 24

What is multitasking?

Answer 24

Multitasking/ multiprogramming: The management of two or more tasks, or programs, running concurrently on the computer system (one CPU).

Question 25

What is multithreading?

Answer 25

Multithreading: A form of multitasking that runs multiple tasks within a single application simultaneously.

Question 26

What is multiprocessing?

Answer 26

Multiprocessing: simultaneous processing of more than one program by assigning them to different processors (multiple CPUs).

Question 27

What is a file system?

Answer 27

is a type of data store which can be used to store, retrieve and update a set of files.

Question 28

What’s is a device management?

Answer 28

Device management provides a way to uniformly notify all applications and system features of changes that may affect their operation or access to resources.

Question 29

Virtual Memory:

Answer 29

A feature that simulates more main memory than actually exists in the computer system by extending primary storage into secondary storage.

Question 30

Graphical user interface (GUI):

Answer 30

system software that allows users to have direct control of visible objects (such as icons) and actions, which replace command syntax.