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Number Systems and Codes MCQs

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Practice free Number Systems and Codes multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 129 questions — no login required.

Question 1easy

Convert hexadecimal value 16 to decimal.

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Question 2easy

Convert the following decimal number to 8-bit binary. 187

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Question 3easy

Convert binary 111111110010 to hexadecimal.

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Question 4easy

Convert the following binary number to decimal. 010112

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Question 5easy

Convert the binary number 1001.00102 to decimal.

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Question 6easy

Decode the following ASCII message. 10100111010100101010110001001011001 01000001001000100000110100101000100

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Question 7easy

One hex digit is sometimes referred to as a(n):

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Question 8easy

Which of the following is the most widely used alphanumeric code for computer input and output?

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Question 9easy

If a typical PC uses a 20-bit address code, how much memory can the CPU address?

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