WAEC Computer Studies questions: Number systems and data representation

24 questions with answers and explanations. Tap an option to check yourself.

All topics Algorithms and flowcharts · 21 Application packages · 25 Computer hardware and the CPU · 21 Computer networks and the internet · 23 Computer security, ethics and safety · 22 Data processing and information · 22 Evolution of computing · 23 Input and output devices · 22 Logic gates and Boolean algebra · 21 Memory and storage devices · 23 Number systems and data representation · 24 Programming languages and BASIC · 22 Software and operating systems · 22

Question 1· Number systems and data representation· WAEC
Convert 1111₂ to base ten.
Explanation and discussion
Question 2· Number systems and data representation· WAEC
Add the binary numbers 1011 and 0110.
Explanation and discussion
Question 3· Number systems and data representation· WAEC
A nibble consists of
Explanation and discussion
Question 4· Number systems and data representation· WAEC
Convert the hexadecimal number 2F to base ten.
Explanation and discussion
Question 5· Number systems and data representation· WAEC
Convert 25 (base 8) to base 10.
Explanation and discussion
Question 6· Number systems and data representation· WAEC
Convert 10110₂ to hexadecimal.
Explanation and discussion
Question 7· Number systems and data representation· WAEC
Convert 17 (base 8) to base 10.
Explanation and discussion
Question 8· Number systems and data representation· WAEC
Add the binary numbers 101 + 11.
Explanation and discussion
Question 9· Number systems and data representation· WAEC
Add the binary numbers 101 and 011.
Explanation and discussion
Question 10· Number systems and data representation· WAEC
Convert 2A (base 16) to base 10.
Explanation and discussion
Question 11· Number systems and data representation· WAEC
Convert 1101 (base 2) to base 10.
Explanation and discussion
Question 12· Number systems and data representation· WAEC
The hexadecimal digit F represents the denary value
Explanation and discussion
Question 13· Number systems and data representation· WAEC
Convert 25 (base 10) to base 2.
Explanation and discussion
Question 14· Number systems and data representation· WAEC
In ASCII, the capital letter A is represented by the decimal code 65. Which code represents B?
Explanation and discussion
Question 15· Number systems and data representation· WAEC
The hexadecimal digit F represents the decimal number
Explanation and discussion
Question 16· Number systems and data representation· WAEC
Convert 10110 (base 2) to base 10.
Explanation and discussion
Question 17· Number systems and data representation· WAEC
Convert 25 (base ten) to binary.
Explanation and discussion
Question 18· Number systems and data representation· WAEC
What is 64 (base ten) in octal?
Explanation and discussion
Question 19· Number systems and data representation· WAEC
Convert 3C (base 16) to base 10.
Explanation and discussion
Question 20· Number systems and data representation· WAEC
Convert 13 (base 10) to binary.
Explanation and discussion

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WAEC Computer Studies questions: Number systems and data representation

Convert 1111₂ to base ten.

Add the binary numbers 1011 and 0110.

A nibble consists of

Convert the hexadecimal number 2F to base ten.

Convert 25 (base 8) to base 10.

Convert 10110₂ to hexadecimal.

Convert 17 (base 8) to base 10.

Add the binary numbers 101 + 11.

Add the binary numbers 101 and 011.

Convert 2A (base 16) to base 10.

Convert 1101 (base 2) to base 10.

The hexadecimal digit F represents the denary value

Convert 25 (base 10) to base 2.

In ASCII, the capital letter A is represented by the decimal code 65. Which code represents B?

The hexadecimal digit F represents the decimal number

Convert 10110 (base 2) to base 10.

Convert 25 (base ten) to binary.

What is 64 (base ten) in octal?

Convert 3C (base 16) to base 10.

Convert 13 (base 10) to binary.