StudyBrixFree worksheets, study guides and courses

Grade 11 · Computer science

Grade 11 Computer science diagnostic

15 questions on digital literacy, data systems, algorithms & logic and data structures, plus 3 from Grade 10. Answer what you can, then check your answers to see which topics are secure and what to practise next.

15 questions4 topicsAbout 15 minutesSet 5 of 5

Skip a question if you do not know the answer. It is better than guessing, because it shows what to practise.

1Algorithms & logicAn outer loop runs 30 times. Each time, an inner loop prints once on each of 18 iterations. How many prints occur?
2Algorithms & logicPython: len([2, 4, 8, 16, 32]). What value is returned?
3Algorithms & logicAdvanced computing concepts: which term fits this description? A formatted unit of data transmitted through a network.
4Data structuresA sorted array has 4095 entries. Binary search always inspects a middle entry. What is the largest number of inspected entries for a successful search? Round the final result to 4 decimal places if needed.
5Data structuresA sorted array has 16383 entries. Binary search always inspects a middle entry. What is the largest number of inspected entries for a successful search? Round the final result to 4 decimal places if needed.
6Data structuresA sorted array has 3 entries. Binary search always inspects a middle entry. What is the largest number of inspected entries for a successful search? Round the final result to 4 decimal places if needed.
7Data systemsA 450 MB payload is sent over a constant 110 Mbps link. Use decimal MB and ignore overhead. Find transfer time. Round the final result to 4 decimal places if needed. Answer in s.
s
8Data systemsA 174 MB payload is sent over a constant 95 Mbps link. Use decimal MB and ignore overhead. Find transfer time. Round the final result to 4 decimal places if needed. Answer in s.
s
9Data systemsA 879 MB payload is sent over a constant 30 Mbps link. Use decimal MB and ignore overhead. Find transfer time. Round the final result to 4 decimal places if needed. Answer in s.
s
10Digital literacyA raw image is 154 × 104 pixels with 4 bytes per pixel. Ignoring headers and compression, how many bytes?
11Digital literacyWhich video feature helps users who cannot hear its speech?
12Digital literacyIs an unrecorded score the same as a measured score of zero?

From Grade 10

These questions check skills from the grade below, so gaps can be spotted early.

13Algorithms & logic (Grade 10)FOR i FROM 8 TO 106 INCLUSIVE STEP 7: print i. How many numbers are printed?
14Digital literacy (Grade 10)A file shrinks from 1400 KB to 1260 KB. What percentage of its original size was saved?
%
15Algorithms & logic (Grade 10)FOR i FROM 10 TO 42 INCLUSIVE STEP 2: print i. How many numbers are printed?