N5 CS: Computer Systems

The value 2960 would be stored in a computer system usig 'floating - point representation' as shown: 0.2960 x 10(4)

Identify th mantissa and exponent in th above floating-point representation:

• Mantissa: 2960

• Mantissa: 2.960

• Exponent:4

• Exponent: 0.4

The current meter reading of 23000.50 would be stored in a computer system using floating-point representation as shown:

0.2300050 x 10(5)

Identify the mantissa and exponent in the above floating point representation:

• Mantissa: 2300050

• Mantissa: 2.300050

• Exponent: 5

• Exponent: 0.5

How a real number is stored in a computer's memory?

• Using floating point representation

• Using value of mantissa and exponent for this number

• Using binary numbers 0 or 1

• A a decimal number with two or more decimal places

State a standard code used to represent text characters and the number of bits used to store each character:

• ASCII American Standard Code for Information Interchange

• Binary code: using values 0 or 1

• Using value of Mantissa and Exponent

• Any code writting in high level language

Each of the letters of the message ERROR will be stored as an ASCII character. Calculate the number of bits required to store this message:

• 8 bits

• 128 bits

• 16 bits

• 40 bits

Select correct names for attributes of vector graphic:

• coordinates

• fill colour

• line colour

• size in pixels

The line (see graphic) is stored as a vector graphic. State one attribute of this object.

• x and y coordinates

• thickness/width and colour

• length, rotation and angle

• transparency, opacity and layer

Vector Graphics are stored in a computer in a form of an object’s (shape’s) set of definitions, properties, instructions, attributes of this object.

• TRUE

• FALSE

Describe how a bit-mapped graphic is represented in a computer system's memory:

• Using grid of pixels

• storing the value of colour for each pixel within this graphic

• with insructions how to draw this graphic

• as a screenshot saved as a bmp file

The user interface design is implemented. It contains a bit-mapped graphic and some text. Describe how a bit-mapped graphic would be stored?

• The bitmapped graphic is stored as a pixels

• The bitmapped graphic would be stored as a x and y coordinates

• Each pixel will store binary value

• Each coordinate (x,y) will store the value