Topic 2 - Computer organization
Question 1
SLPaper 1Calculate, showing your working in each case:the binary (base 2) value of the denary (base 10) number: 105.
Calculate, showing your working in each case: the hexadecimal (base 16) value of the denary (base 10) number: 200.
Question 2
SLPaper 1Construct a logic diagram for the following expression.
NOT A OR (A AND B)
Question 3
SLPaper 1Colours are represented by a computer as a combination of the three primary colours: red, green and blue.
Numerical values are used to represent the different shades of each primary colour. These values range from 0 to 255 in decimal, or 00 to FF in hexadecimal.
State why hexadecimal numbers are frequently used in computing.
State the number of bits used to represent a non-primary colour, such as yellow.
State the maximum number of colours that can be represented in a computer pixel.
Question 4
SLPaper 1Copy and complete the following truth table where:
X = A XOR B
Y = A NOR C
Z = X OR NOT Y
Question 5
SLPaper 1Calculate how many different colours can be represented using two hexadecimal characters.
Question 6
SLPaper 1Construct a logic diagram for the following Boolean expression.
NOT A OR (A AND B)
Question 7
SLPaper 1State the hexadecimal equivalent of the following binary number:
11011111
Question 8
SLPaper 1Construct the truth table for the following logic circuit:
Question 9
SLPaper 1A company that provides training for teachers plans to set up a training room in its offices with a network of 15 computers. Each computer has 1 TB of storage and 16 GB of random access memory (RAM).
In order to minimize costs, the company decided only to install general application software on the training computers.
The company has decided to allow the teachers to use their own devices in its training room by adding wireless networking.
Identify two characteristics of RAM.
State the purpose of persistent storage on the computers.
Identify two types of general application software that would be installed on the training computers.
Outline one advantage to the company of implementing this change.
Outline one disadvantage to the company of implementing this change.
Describe one method of security that may be used on this wireless network.
Explain why the speed of data transmission on the wireless network in the training room may vary.
Question 10
SLPaper 1Identify one function of a single-user operating system.
