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i) Convert 01101001 from binary to denary. ii) Convert 27 from denary to hexadecimal. ii) State one use of hexadecimal in computing and why it is more beneficial in this application that binary.

i) 01101001 2 = 105 10 ii) 27 10 = 1B 16 iii) Colour codes, MAC addresses, memory locations, many others.The main advantage of hexadecimal over a number system like binary is that it is far more compact. A 1...
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Answered by Shafaan J. • Computing tutor
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Write a Pseudocode function that returns the factorial of an integer input.

--------------------------------------INPUT XY = 1 WHILE ( X > 1) Y = X * Y X = X - 1 OUTPUT Y-------------------------------It is also possible to complete this task using recursion DEF fact(n): IF (n &g...
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Describe two different functions performed by an operating system [4 marks]

As we can see the question is worth four marks, so we need to identify two functions performed by an operating system, and then be able to give a description of what they actually are. It might be easiest to...
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Answered by Matthew G. • Computing tutor
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How would you represent the decimal number 143 in 7 bit binary?

First look at the leftmost digit, which represents how many 128s are in the number. There is one 128 in 143, so we mark that as a 1. Then take the remainder of the value - in this case 143-128 = 15, and move...
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Answered by Joel C. • Computing tutor
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Give two types of management of either hardware or other resources that are performed by an operating system.

Memory Management, Processor Scheduling. Memory management allocates a specific area of memory to each application or open file while the computer is running. If the computer's RAM is not enough for a partic...
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