Free Grade 11 Computer Science Worksheets with Answers

Grade 11 Logic Gates

3B-CS-02

Working out the outputs of AND, OR, NOT and XOR gates and small logic circuits.

e.g. A circuit computes (A AND B) XOR C with A = 0, B = 0, C = 0. What is the output?

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Grade 11 Boolean Expressions

Evaluating Boolean expressions with AND, OR and NOT, including comparisons.

e.g. What is the value of not (True and True) or False?

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Grade 11 Functions & Return Values

Tracing functions with parameters and return values, including functions that call other functions.

e.g. def f(x): return 4 * x + 5. What does print(f(f(6))) show?

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Grade 11 Recursion

Tracing recursive functions like factorial, Fibonacci and sums, and counting calls.

e.g. def p(b, e): if e == 0: return 1; return b * p(b, e - 1). What is p(2, 3)?

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Grade 11 Lists & Arrays

3B-AP-12

Indexing, slicing and changing lists, and finding their length and values.

e.g. nums = [9, 47, 22, 2, 41, 26]. What is nums[-3]?

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Grade 11 Searching & Sorting

3B-AP-10

Counting the steps in linear and binary search and tracing bubble and selection sort passes.

e.g. Binary search on the sorted list 5, 7, 9, 10, 17, 24, 28, 31, 34. Which number is checked first (the middle item)?

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Grade 11 Algorithm Efficiency (Big-O)

3B-AP-11

Comparing how the number of steps grows: O(1), O(log n), O(n) and O(n²).

e.g. What is the time complexity of this code: for k in range(n):; print(k)? Choose O(1), O(log n), O(n) or O(n²).

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Grade 11 Cybersecurity & Passwords

Password strength by counting combinations, spotting threats, and simple encryption.

e.g. A password is 2 lowercase letters (a–z). How many passwords are possible?

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Grade 11 Computing Challenge Puzzles

Challenge

Puzzles that stretch computational thinking: bit patterns, logic and clever counting.

e.g. What is the largest whole number you can store in 7 bits?

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