Podcast
Questions and Answers
What happens to the contents of volatile memory when power is turned off?
What happens to the contents of volatile memory when power is turned off?
- It is saved
- It is lost (correct)
- It is deleted
- It remains the same
Nonvolatile memory loses its contents when power is removed.
Nonvolatile memory loses its contents when power is removed.
False (B)
What is an example of a type of nonvolatile memory?
What is an example of a type of nonvolatile memory?
ROM
RAM chips usually reside on a _______________________ and are inserted into memory slots.
RAM chips usually reside on a _______________________ and are inserted into memory slots.
What is the primary function of a USB adapter?
What is the primary function of a USB adapter?
A bus is a physical connector that allows devices to communicate with each other.
A bus is a physical connector that allows devices to communicate with each other.
What does memory cache do to speed up the computer?
What does memory cache do to speed up the computer?
Match the following types of RAM with their descriptions:
Match the following types of RAM with their descriptions:
What is the term for the number of bits the processor can interpret and execute at a given time?
What is the term for the number of bits the processor can interpret and execute at a given time?
SRAM is a type of dynamic RAM.
SRAM is a type of dynamic RAM.
A computer might have three types of buses, including the _______________________ bus.
A computer might have three types of buses, including the _______________________ bus.
What is the main difference between volatile and nonvolatile memory?
What is the main difference between volatile and nonvolatile memory?
Match the following bus types with their descriptions:
Match the following bus types with their descriptions:
What is the purpose of the Address bus?
What is the purpose of the Address bus?
A USB adapter is a type of bus.
A USB adapter is a type of bus.
What are the three components of a bus?
What are the three components of a bus?
What does a byte typically represent in a computer or mobile device?
What does a byte typically represent in a computer or mobile device?
Memory size is commonly measured in megabytes (MB).
Memory size is commonly measured in megabytes (MB).
What are the three basic categories of items stored in memory?
What are the three basic categories of items stored in memory?
Each location in memory has an ___________________________.
Each location in memory has an ___________________________.
Match the following memory-related terms with their descriptions:
Match the following memory-related terms with their descriptions:
What is stored in memory?
What is stored in memory?
Memory consists of non-electronic components.
Memory consists of non-electronic components.
What is the purpose of memory in a computer or mobile device?
What is the purpose of memory in a computer or mobile device?
What is the primary function of the case in a computer?
What is the primary function of the case in a computer?
A computer chip contains mechanical circuits.
A computer chip contains mechanical circuits.
What is the main circuit board of the computer?
What is the main circuit board of the computer?
The motherboard is the main _______________________ board of the computer.
The motherboard is the main _______________________ board of the computer.
Match the following components with their functions:
Match the following components with their functions:
What is the purpose of USB adapters?
What is the purpose of USB adapters?
The case is responsible for storing data in the computer.
The case is responsible for storing data in the computer.
What do batteries provide power to?
What do batteries provide power to?
What is the primary function of a power supply or laptop AC adapter?
What is the primary function of a power supply or laptop AC adapter?
Batteries are typically non-rechargeable in mobile devices
Batteries are typically non-rechargeable in mobile devices
What are the two ways mobile computers and devices can run?
What are the two ways mobile computers and devices can run?
Mobile devices typically use _______________ batteries
Mobile devices typically use _______________ batteries
What is the purpose of a power supply or battery in a computer?
What is the purpose of a power supply or battery in a computer?
A computer can only run using a power supply
A computer can only run using a power supply
Match the following components with their functions
Match the following components with their functions
What is the purpose of a power supply or laptop AC adapter?
What is the purpose of a power supply or laptop AC adapter?
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Study Notes
Inside the Case
- The case contains and protects the electronics of the computer or mobile device from damage.
- The motherboard is the main circuit board of the computer.
The Motherboard
- A computer chip contains integrated circuits.
- A byte represents a single character in the computer or mobile device.
Data Representation
- Data is represented electronically by the presence or absence of an electronic charge.
Memory
- Memory consists of electronic components that store instructions waiting to be executed by the processor, data needed by those instructions, and the results of processing the data.
- Memory stores three basic categories of items: the operating system and other programs, applications, and data being processed and the resulting information.
- Each location in memory has an address.
- Memory size is commonly measured in gigabytes (GB) or terabytes (TB).
- Computers and mobile devices contain two types of memory: volatile memory (loses its contents when power is turned off) and nonvolatile memory (does not lose contents when power is removed).
- Examples of volatile memory include RAM. Examples of nonvolatile memory include ROM, flash memory, and CMOS.
- Two common types of RAM exist: Dynamic RAM (DRAM) and Static RAM (SRAM).
- RAM chips usually reside on a memory module and are inserted into memory slots.
- Memory cache speeds the processes of the computer because it stores frequently used instructions and data.
Adapters
- A USB adapter enhances functions of a mobile computer and/or provides connections to peripheral devices.
Buses
- A bus allows the various devices both inside and attached to the system unit to communicate with one another.
- There are three types of buses: data bus, address bus, and control bus.
- Word size is the number of bits the processor can interpret and execute at a given time.
- A computer might have three types of buses: system bus, backside bus, and expansion bus.
Power Supply and Batteries
- The power supply or laptop AC adapter converts the wall outlet AC power into DC power.
- Mobile computers and devices can run using either a power supply or batteries.
- Batteries typically are rechargeable lithium-ion batteries.
Caring for Computers and Mobile Devices
- Computers and mobile devices require care to maintain their performance and longevity.
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