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WorksheetsCS Knowledge... so far
Total questions: 35
Worksheet time: 20mins
How many nybbles make a byte?
Jaws
Five
One
Two
What is 0110 as a denary number?
7
12
6
4
What is 13 as a binary number?
0001
1111
1100
1101
What number base is binary?
1
2
3
4
What number base in denary?
8
9
10
11
An overflow error is where...
0s and 1s... Oh my!
Not enough room in memory to store results
Wrong file type
To much room in memory to add everything up
A right shift is the same as...
Hexadecimal
Multiplying
Subtracting
Dividing
A left shift is the same as...
Multiplying
Dividing
Adding
Rounding
An overflow error can cause...
Correct results
Loss of data
Incorrect results
A glitch in the Matrix
Convert 1011 0010 into hexadecimal
AA
BC
B2
C1
Convert A3 into binary...
1010 0011
1100 0001
34
1001 1011
What is 38 as a Hexadecimal number?
A6
BB
5F
26
Which of these activities are examples of following an algorithm?
Playing a game of chess
Baking a cake
Playing a piece of sheet music on the piano
Following directions from Google Maps
A structured approach to programming which involves breaking a large program down into a number of smaller sub-programs is called ...
object orientation
algorithm
decomposition
abstraction
Abstraction is a recognised technique of Computational Thinking. Which of these is the best definition of abstraction?
Creating a set of logical steps that when followed achieve a particular task
Breaking a problem down into several layers of smaller and simpler subproblems
The process of removing or hiding unnecessary detail from a problem
Exploiting the recurrence of patterns in data to make processing more efficient
The following list is to be sorted using a bubble sort:
12, 6, 8, 1, 3
What will the list look like after the first iteration through the list.
6, 8, 1, 3, 12
6, 12, 1, 8, 3
1, 3, 6, 8, 12
6, 8, 1, 12, 3
Which sorting algorithm takes an item from the list, and puts it in the correct place in a sorted list?
Merge
Bubble
Insertion
None of these
How does merge sort work?
It splits the list to single elements before piecing them back together, one sublist at a time.
Each item in the list is compared with the following item starting with the last value till the first.
Taking one item at a time from an unsorted list, each new item is compared with the previous until its place is found.
Each item in the list is individually compared with the following item starting with the first value till the last.
Which of the following can affect the performance of a CPU?
Cache size
Number of cores
Clock Speed
All of the above
What is the purpose of RAM?
Stores the current data, program and files being used.
Holds the BIOS and OS used at start up.
