GCSE CS Paper 2 Theory Quiz Question Preview (ID: 43044)
GCSE CS Paper 2 Theory Quiz.
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3 components of computational thinking is
a) abstraction, decomposition and algorithmic thinking
b) abstruction, composition and numerical thinking
c) obstruction, brain, arithmetic logic unit
d) computer, cpu, processing
Breaking a large problem into sub problems is called
a) decomposition
b) abstraction
c) computational thinking
d) algorithm
Abstraction is
a) removing unnecessary details to make the problem easier to solve
b) making the problem into subproblems
c) another word for iteration
d) looping a problem so it returns a result
1 feature of abstraction
a) Break the problem into smaller problems
b) Find patterns and similarities
c) Develop solutions for more than 1 problem
d) Used for abstract art in computers
An algorithm is
a) A sequence of steps carried out to solve a problem
b) a looped program
c) An iteration
d) decomposition
One way of displaying an algorithm is a
a) flowchart
b) drawing
c) sketch
d) essay
Compare each item 1 by 1 to see if it matches
a) linear search
b) binary search
c) bubble search
d) insertion search
It splits an array into halves, look at middle value and take the split left to right depending on the searched letter or number
a) binary search
b) linear search
c) bubble search
d) divide search
A binary search can be carried out if unsorted
a) True
b) False
c)
d)
Compare the first number and second number. Swap them if left side is larger to sort
a) Bubble Sort
b) Insertion sort
c) Merge sort
d) Binary sort
Split the list into single lists and then combine and sort, combine and sort, combine and sort
a) merge sort
b) binary search
c) linear search
d) bubble sort
Start at the left, compare to 2nd number, if 2nd smaller, swap, go to next one in list etc.
a) merge sort
b) bubble sort
c) linear sort
d) insertion sort
Validation is
a) a computer check to ensure data entered is reasonable
b) a computer check to check it is correct
c) a visual check on screen to see if it matches the source
d) a human check to see if data entered twice
a check to see if it is within the limits
a) range check
b) type check
c) lookup check
d) format check
a check to see if it is the correct datatype
a) type check
b) range check
c) presence check
d) format check
Sanitisation is
a) stripping the string ro remove unwanted characters
b) Deleting a string
c) Swapping a string with another string
d) Updating a string with validation
A way to maintain code
a) Comments and indentation
b) comments and running the code
c) indenting the code and using functions
d) looping the code and using indents
An authentication method is
a) Biometric
b) shoeprint
c) Locked safe
d) Encryption
2 way factor authentication is
a) Having username and password and phone code sent to mobiles
b) A door with 2 locks
c) A safe with 2 sets of combinations
d) 2 methods of prevention
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