Podcast
Podcast
Podcast
Something went wrong
Questions and Answers
Questions and Answers
Which type of memory loses its contents when the computer is turned off?
Which type of memory loses its contents when the computer is turned off?
- HDD
- ROM
- RAM (correct)
- SSD
ROM (Read Only Memory) allows you to change the data stored on it.
ROM (Read Only Memory) allows you to change the data stored on it.
False (B)
What is the smallest unit of storage?
What is the smallest unit of storage?
Bit
A _______ is half of a byte.
A _______ is half of a byte.
Which of the following storage types is generally the fastest?
Which of the following storage types is generally the fastest?
Virtual memory is always faster than physical RAM.
Virtual memory is always faster than physical RAM.
What number system is most commonly used by people, also known as base 10?
What number system is most commonly used by people, also known as base 10?
A(n) _______ is a whole number without a decimal point or fraction.
A(n) _______ is a whole number without a decimal point or fraction.
Match the unit of storage with its corresponding size:
Match the unit of storage with its corresponding size:
Which of these is an example of metadata?
Which of these is an example of metadata?
A positive number is any number less than 0.
A positive number is any number less than 0.
What is the name of a system for representing characters in binary?
What is the name of a system for representing characters in binary?
The furthest left digit in a string of binary numbers is known as the _______.
The furthest left digit in a string of binary numbers is known as the _______.
What is the key difference between HDD and SSD?
What is the key difference between HDD and SSD?
Hexadecimal is a number system that uses base 10.
Hexadecimal is a number system that uses base 10.
What term describes a situation where not enough space is allocated to store the results of a calculation?
What term describes a situation where not enough space is allocated to store the results of a calculation?
Pictures on a computer are divided into a grid; each square in the grid being one _______.
Pictures on a computer are divided into a grid; each square in the grid being one _______.
Which of the following is a characteristic of analogue signals?
Which of the following is a characteristic of analogue signals?
What is the purpose of a binary shift?
What is the purpose of a binary shift?
If the resolution of an image increases, the amount of _______ in the image increases, making the image clearer.
If the resolution of an image increases, the amount of _______ in the image increases, making the image clearer.
Questions and Answers
Something went wrong
Flashcards
Flashcards
Primary Storage
Primary Storage
Holds data, programs, and instructions currently in use.
RAM (Random Access Memory)
RAM (Random Access Memory)
Stores programs and data before CPU processing; contents lost when power is off.
ROM (Read Only Memory)
ROM (Read Only Memory)
Data is retrievable but unchangeable; contents remain when power is off.
Volatile Memory
Volatile Memory
Signup and view all the flashcards
Non-Volatile Memory
Non-Volatile Memory
Signup and view all the flashcards
Virtual Memory
Virtual Memory
Signup and view all the flashcards
Optical Storage
Optical Storage
Signup and view all the flashcards
Magnetic Storage
Magnetic Storage
Signup and view all the flashcards
Solid State Storage
Solid State Storage
Signup and view all the flashcards
HDD (Hard Disk Drive)
HDD (Hard Disk Drive)
Signup and view all the flashcards
DVD (Digital Versatile Disk)
DVD (Digital Versatile Disk)
Signup and view all the flashcards
CD (Compact Disk)
CD (Compact Disk)
Signup and view all the flashcards
SSD (Solid State Drive)
SSD (Solid State Drive)
Signup and view all the flashcards
Bit
Bit
Signup and view all the flashcards
Nibble
Nibble
Signup and view all the flashcards
Byte
Byte
Signup and view all the flashcards
Kilobyte (KB)
Kilobyte (KB)
Signup and view all the flashcards
Megabyte (MB)
Megabyte (MB)
Signup and view all the flashcards
Gigabyte (GB)
Gigabyte (GB)
Signup and view all the flashcards
Terabyte (TB)
Terabyte (TB)
Signup and view all the flashcards
Denary
Denary
Signup and view all the flashcards
Positive Number
Positive Number
Signup and view all the flashcards
Negative Number
Negative Number
Signup and view all the flashcards
Integer
Integer
Signup and view all the flashcards
Overflow Error
Overflow Error
Signup and view all the flashcards
Hexadecimal
Hexadecimal
Signup and view all the flashcards
Binary Shift
Binary Shift
Signup and view all the flashcards
Most Significant Bit
Most Significant Bit
Signup and view all the flashcards
Least Significant Bit
Least Significant Bit
Signup and view all the flashcards
Character
Character
Signup and view all the flashcards
Character Set
Character Set
Signup and view all the flashcards
ASCII
ASCII
Signup and view all the flashcards
Unicode
Unicode
Signup and view all the flashcards
Pixel
Pixel
Signup and view all the flashcards
Metadata
Metadata
Signup and view all the flashcards
Colour Depth
Colour Depth
Signup and view all the flashcards
Resolution
Resolution
Signup and view all the flashcards
Sample Rate
Sample Rate
Signup and view all the flashcards
Bit Depth
Bit Depth
Signup and view all the flashcards
Analogue
Analogue
Signup and view all the flashcards
Flashcards
Something went wrong
Study Notes
Study Notes
Primary Storage (Memory)
- Primary storage, also known as memory, holds the data, programs, and instructions currently in use.
- Random Access Memory (RAM) stores programs and data before they are processed by the CPU.
- RAM is read/write memory, meaning its contents can be changed.
- The contents of RAM are lost when the computer is turned off.
- Read Only Memory (ROM) allows data to be retrieved but not changed and its contents are not lost when the computer is turned off.
- ROM is used to store programs for embedded systems.
- Data stored in volatile memory is lost when the computer is turned off.
- Data stored in non-volatile memory is not lost when the computer is turned off.
- Virtual memory is space on the computer's hard drive used as main memory (RAM).
- Virtual memory is slower than main memory.
Secondary Storage
- Optical storage stores data on a spinning plastic or metal disk.
- Data is read from and written to an optical disk using a laser.
- Magnetic storage uses magnetic fields to store data.
- A read/write head reads and writes data to and from magnetic storage media.
- Solid-state storage uses flash memory to store data.
- Solid-state drives (SSDs) have no moving parts and are much faster than optical or magnetic storage.
- A Hard Disk Drive (HDD) is a magnetic storage drive that can store large amounts of data and is often the main method of secondary storage in personal computers.
- An HDD contains a number of internal disks and a read/write head used to read and write data.
- Digital Versatile Disks (DVDs) are high-capacity optical storage disks commonly used for video storage, with capacities available up to 17GB.
- Compact Disks (CDs) are optical storage disks often used to store music, with a capacity usually around 800MB.
- Solid State Drives (SSDs) perform the same function as traditional HDDs.
- SSDs are much faster than HDDs and less easy to damage since they have no moving parts, but are also more expensive and usually have a lower capacity.
Units
- A bit is the smallest unit of storage, containing a binary 1 or 0.
- A nibble is 4 bits (half a byte).
- A byte is 8 bits.
- A kilobyte (KB) is 1000 bytes.
- A megabyte (MB) is 1000 KB.
- A gigabyte (GB) is 1000 MB.
- A terabyte (TB) is 1000 GB.
- A petabyte (PB) is 1000 TB.
- Binary is a number system using base 2.
- Denary is the number system most often used by people, using the digits 0 to 9 and is also known as base 10 or decimal.
Data Storage
- A positive number is a number greater than 0.
- A negative number is a number less than 0.
- An integer is a whole number without a decimal point or fraction (e.g., 1, 100, or 88122).
- An overflow error occurs when not enough space has been allocated to store the results of a calculation.
- Hexadecimal is a number system used by computers, containing 16 symbols (0-9 and A-F) and also known as base 16.
- A binary shift is a process used to perform maths on binary numbers by moving all the digits to the left or right.
- The most significant bit is the furthest left digit in a string of binary numbers, and its position means it has the highest value.
- The least significant bit is the furthest right digit in a string of binary numbers, and its position means it has the lowest value.
- A character is a single symbol, such as a letter, number, or punctuation mark.
- A character set is a system for representing characters in binary, where each character is assigned a unique binary number.
- ASCII (American Standard Code for Information Interchange) is a 7-bit character set used to represent characters.
- Unicode is a much larger character set created to overcome the limited number of characters available in ASCII, including many different language characters as well as other symbols like emojis.
- A pixel, short for Picture Element, is a single square in a grid that pictures on a computer are divided into, with each square being a single color.
- Metadata is additional data about a file, such as when it was created or who created it, and is commonly used with photos to store data like the camera make or location.
- Colour depth is the amount of bits available for colours in an image, with a higher colour depth allowing for more colours and a more realistic image.
- Resolution is the number of pixels an image is divided into, with a higher resolution resulting in more pixels and a clearer image.
- Sample rate is the number of samples taken in one second, measured in hertz (Hz), with 1Hz being one sample per second, and a higher sample rate resulting in more samples and higher quality.
- Bit depth is the number of bits available for each sample, with a higher bit depth allowing for more bits and better quality.
- Analogue is a continuously varying signal, typically represented as a curved line, and includes examples like sound or temperature recordings.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Study Notes
Something went wrong
