Information Representation Flashcards
What is a bit?
A digit in the binary number system written using either of the symbols 0 or 1
What is a byte?
A group of 8 bits treated as a single unit
What is a nibble?
A group of 4 bits
What is an overflow error?
A condition when the result of a calculation is too large to fit into the number of bits defined for storage.
What is BCD?
Binary Coded Decimal is where a binary value is stored representing one denary digit in a nibble.
What is a vector graphic?
A graphic consisting of drawing objects defined in a drawing list.
What is a drawing object?
A component defined by geometric formulae and associated properties.
What is a drawing list?
A drawing list contains one set of values for each drawing object.
What is a property in computer science?
A property defines one aspect of the appearance of the drawing object.
What is a pixel?
A picture element (pixel) is the smallest identifiable component of a bitmap image, it is defined by two properties: its position in the bitmap matrix and its colour
What is the colour depth?
This is the number of bits used to represent one pixel.
What is the image resolution?
The number of pixels in the bitmap file is the product of the number of pixels per row and the number of rows.
What is the bit depth?
The number of bits used to represent each red, green and blue colour.
What is the screen resolution?
The product of the width and height values for the number of pixels that the screen can display.
What is a file header?
This is a set of bytes at the beginning of a bitmap file which identifies the file and contains information about the coding used.
