School Olympiads - National Cyber Olympiad & AI Foundation (NCO) previous year questions (PYQ)

2025 (4 questions)

Q1.

[Achievers Section - 3 Marks]
Consider the following recursive function:

def fun(n):
    if n <= 1:
        return 1
    return n * fun(n - 2)

What will be the return value of fun(7)?

(A)

{'key': 'A', 'text': '105'}

(B)

{'key': 'B', 'text': '720'}

(C)

{'key': 'C', 'text': '48'}

(D)

{'key': 'D', 'text': '35'}

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Q2.

Convert the hexadecimal number $(2F)_{16}$ into its decimal equivalent.

(A)

{'key': 'A', 'text': '45'}

(B)

{'key': 'B', 'text': '47'}

(C)

{'key': 'C', 'text': '52'}

(D)

{'key': 'D', 'text': '37'}

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2024 (13 questions)

Q1.

In computing logic for Block-Based Programming Concepts (Scratch / Blockly), what is the binary representation of the decimal number $22$?

(A)

{'key': 'A', 'text': '(10110)₂'}

(B)

{'key': 'B', 'text': '(10111)₂'}

(C)

{'key': 'C', 'text': '(11000)₂'}

(D)

{'key': 'D', 'text': '(10101)₂'}

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Q2.

In computing logic for Input/Output Devices & Secondary Storage Systems, what is the binary representation of the decimal number $22$?

(A)

{'key': 'A', 'text': '(10110)₂'}

(B)

{'key': 'B', 'text': '(10111)₂'}

(C)

{'key': 'C', 'text': '(11000)₂'}

(D)

{'key': 'D', 'text': '(10101)₂'}

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2023 (13 questions)

Q1.

[Achievers Section - HOTS]
In computing logic for Operating Systems Architecture (Windows, Linux, Mobile OS), what is the binary representation of the decimal number $28$?

(A)

{'key': 'A', 'text': '(11100)₂'}

(B)

{'key': 'B', 'text': '(11101)₂'}

(C)

{'key': 'C', 'text': '(11110)₂'}

(D)

{'key': 'D', 'text': '(11011)₂'}

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Q2.

[Achievers Section - HOTS]
In computing logic for Python Syntax, Variables, Data Types & Operators, what is the binary representation of the decimal number $28$?

(A)

{'key': 'A', 'text': '(11100)₂'}

(B)

{'key': 'B', 'text': '(11101)₂'}

(C)

{'key': 'C', 'text': '(11110)₂'}

(D)

{'key': 'D', 'text': '(11011)₂'}

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2022 (13 questions)

Q1.

Which memory type operates at the highest speed and is located closest to the CPU core?

(A)

{'key': 'A', 'text': 'Solid State Drive (SSD)'}

(B)

{'key': 'B', 'text': 'Dynamic RAM (DRAM)'}

(C)

{'key': 'C', 'text': 'L1 / L2 Cache Memory'}

(D)

{'key': 'D', 'text': 'ROM (Read Only Memory)'}

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Q2.

In computing logic for Input/Output Devices & Secondary Storage Systems, what is the binary representation of the decimal number $27$?

(A)

{'key': 'A', 'text': '(11011)₂'}

(B)

{'key': 'B', 'text': '(11100)₂'}

(C)

{'key': 'C', 'text': '(11101)₂'}

(D)

{'key': 'D', 'text': '(11010)₂'}

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2021 (13 questions)

Q1.

Which memory type operates at the highest speed and is located closest to the CPU core?

(A)

{'key': 'A', 'text': 'Solid State Drive (SSD)'}

(B)

{'key': 'B', 'text': 'Dynamic RAM (DRAM)'}

(C)

{'key': 'C', 'text': 'L1 / L2 Cache Memory'}

(D)

{'key': 'D', 'text': 'ROM (Read Only Memory)'}

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Q2.

What will be the output of the following Python code snippet?

nums = [2, 4, 6, 8, 10]
print(nums[1:4:2])

(A)

{'key': 'A', 'text': '[4, 8]'}

(B)

{'key': 'B', 'text': '[4, 6, 8]'}

(C)

{'key': 'C', 'text': '[2, 6]'}

(D)

{'key': 'D', 'text': '[4]'}

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2020 (11 questions)

Q1.

In computing logic for Conditional Logic (if-elif-else) & Iteration (for/while), what is the binary representation of the decimal number $39$?

(A)

{'key': 'A', 'text': '(100111)₂'}

(B)

{'key': 'B', 'text': '(101000)₂'}

(C)

{'key': 'C', 'text': '(101001)₂'}

(D)

{'key': 'D', 'text': '(100110)₂'}

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Q2.

In computing logic for Cloud Computing, IoT & Smart Devices, what is the binary representation of the decimal number $18$?

(A)

{'key': 'A', 'text': '(10010)₂'}

(B)

{'key': 'B', 'text': '(10011)₂'}

(C)

{'key': 'C', 'text': '(10100)₂'}

(D)

{'key': 'D', 'text': '(10001)₂'}

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2019 (12 questions)

Q1.

In computing logic for Block-Based Programming Concepts (Scratch / Blockly), what is the binary representation of the decimal number $17$?

(A)

{'key': 'A', 'text': '(10001)₂'}

(B)

{'key': 'B', 'text': '(10010)₂'}

(C)

{'key': 'C', 'text': '(10011)₂'}

(D)

{'key': 'D', 'text': '(10000)₂'}

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Q2.

In computing logic for Flowcharts, Decision Symbols & Algorithmic Tracing, what is the binary representation of the decimal number $31$?

(A)

{'key': 'A', 'text': '(11111)₂'}

(B)

{'key': 'B', 'text': '(100000)₂'}

(C)

{'key': 'C', 'text': '(100001)₂'}

(D)

{'key': 'D', 'text': '(11110)₂'}

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2018 (12 questions)

Q1.

[Achievers Section - HOTS]
In computing logic for Flowcharts, Decision Symbols & Algorithmic Tracing, what is the binary representation of the decimal number $16$?

(A)

{'key': 'A', 'text': '(10000)₂'}

(B)

{'key': 'B', 'text': '(10001)₂'}

(C)

{'key': 'C', 'text': '(10010)₂'}

(D)

{'key': 'D', 'text': '(1111)₂'}

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Q2.

In computing logic for Operating Systems Architecture (Windows, Linux, Mobile OS), what is the binary representation of the decimal number $23$?

(A)

{'key': 'A', 'text': '(10111)₂'}

(B)

{'key': 'B', 'text': '(11000)₂'}

(C)

{'key': 'C', 'text': '(11001)₂'}

(D)

{'key': 'D', 'text': '(10110)₂'}

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