Computer Flashcards
Computers use binary codes to represent and interpret letters, numbers, and special characters with
bits
Is a diagram that uses graphic symbols to depict the nature and flow of the steps in a process. Another name for this tool is “flow diagram.”
Flowchart
is commonly used by systems analysts to visualize the series of processes in a business system
Flowchart
is a useful tool to design an efficient business system and to troubleshoot or improve an existing system
Flowchart
A flowchart consists of elements, such as the.
terminator, process, sub process, decision, arrow lines, and connectors
is represented by a small rectangle with curved corners.
terminator
appears at the start and at the end of a flowchart.
terminator
The end terminator appears only once on a
single flowchart.
is represented by a rectangle. It refers to an action in a business process. It must be described clearly and concisely.
Process
It can be described using a single verbnoun phrase; for example, “Order Office Supplies.” The same level of detail must be kept in processes on a single flowchart.
Process
is represented by a rectangle with double lines on each side.
Subprocess
is a major process that could be broken up into simpler processes developed into another flowchart.
Subprocess
is represented by a diamond. A process that can answer a decision of “yes” or “no” requires a decision box.
Decision
is represented by a small circle or a connector box and is labeled using letters. A flowchart written on a single page is clearer than a flowchart on several pages.
Connector
drawn in one direction, preferably from top to bottom, keep a flowchart clear. Avoid that loop because this could indicate redundancy in the business process.
Arrow line
indicate both the starting point and the ending point of the process steps.
Ovals
represents an individual step or activity in the process.
Box
shows a decision point, such as yes/no or go/no-go. Each path emerging from the diamond must be labeled with one of the possible answers.
Diamond
indicates that a particular step is connected to another page or part of the Flowchart. A letter placed in the circle clarifies the continuation.
Circle
shows where an in-process measurement occurs
Triangle
is represented and stored in a digital binary format
Information
is an abbreviation of binary digit and represents the smallest piece of data
Term bit
Humans interpret words and pictures; computers interpret only .
Patterns of bits
A commonly used code is the
American Standard Code Information interchange (ASCII).
With ASCII, each character is represented by a
string of bits.
A bit can have only two possible values, a ____ or _____
one digit (1) or a zero digit (0).
can be used to represent the state of something that has two states
bit
When referring to storage space, we use the
terms bytes
bit is the smallest representation of data, the most basic unit of digital storage is the .
byte
is 8 bits and is the smallest unit of measure (UOM) used to represent data storage capacity.
byte
⚫kilobyte =
1,024 bytes
⚫megabyte =
1,048,576 bytes
•Gigabyte =
1,073,741,824 bytes
•Terabyte=
1,099,511,627,776 bytes
when something is represented digitally, the greater the detail, _______ the number of bits needed to represent it.
the greater
picture from a digital camera will use around 360KB, and a high-resolution picture could use 2 MB or more.
low-resolution
A low-resolution picture from a digital camera will use around ______, and a high-resolution picture could use_____ or more.
360KB,2 MB
are typically used to measure the size or storage capacity of a device
Kilobytes, megabytes, gigabytes, and terabytes
• Examples of components and devices that use byte storage include:
random access memory (RAM), hard dis drive space, CDs, DVDs, and MP3 players.
have a data storage capacity of approximately 700 MB.
CDs
have a data storage capacity of approximately 4.3 GB on a single-layer disc, and approximately 8.5 GB on a dual- layer disc.
DVDs
have a storage capacity of 25 GB on a single-layer disc, and 50 GB on a dual-layer disc.
BDs
