JAMB and WAEC Computer Studies questions: Number systems and data representation

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

All topics Algorithms and flowcharts · 39 Application packages · 46 Computer hardware and the CPU · 41 Computer networks and the internet · 45 Computer security, ethics and safety · 40 Data processing and information · 40 Evolution of computing · 42 Input and output devices · 40 Logic gates and Boolean algebra · 39 Memory and storage devices · 44 Number systems and data representation · 47 Programming languages and BASIC · 43 Software and operating systems · 42

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· JAMB
The binary equivalent of the decimal number 13 is
Explanation and discussion
Question 4· Number systems and data representation· WAEC
A nibble consists of
Explanation and discussion
Question 5· Number systems and data representation· JAMB
Find the 4-bit two's complement of 0101.
Explanation and discussion
Question 6· Number systems and data representation· WAEC
Convert the hexadecimal number 2F to base ten.
Explanation and discussion
Question 7· Number systems and data representation· JAMB
Convert 1010 1010₂ to hexadecimal.
Explanation and discussion
Question 8· Number systems and data representation· JAMB
Convert 37₁₀ to binary.
Explanation and discussion
Question 9· Number systems and data representation· WAEC
Convert 25 (base 8) to base 10.
Explanation and discussion
Question 10· Number systems and data representation· WAEC
Convert 10110₂ to hexadecimal.
Explanation and discussion
Question 11· Number systems and data representation· JAMB
ASCII is a code used to represent
Explanation and discussion
Question 12· Number systems and data representation· WAEC
Convert 17 (base 8) to base 10.
Explanation and discussion
Question 13· Number systems and data representation· JAMB
The two's complement of 0011 (4 bits) is
Explanation and discussion
Question 14· Number systems and data representation· WAEC
Add the binary numbers 101 + 11.
Explanation and discussion
Question 15· Number systems and data representation· WAEC
Add the binary numbers 101 and 011.
Explanation and discussion
Question 16· Number systems and data representation· JAMB
Add 47₈ and 25₈, giving the answer in octal.
Explanation and discussion
Question 17· Number systems and data representation· JAMB
Convert 3F₁₆ to decimal.
Explanation and discussion
Question 18· Number systems and data representation· WAEC
Convert 2A (base 16) to base 10.
Explanation and discussion
Question 19· Number systems and data representation· WAEC
Convert 1101 (base 2) to base 10.
Explanation and discussion
Question 20· Number systems and data representation· WAEC
The hexadecimal digit F represents the denary value
Explanation and discussion

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JAMB and WAEC Computer Studies questions: Number systems and data representation

Convert 1111₂ to base ten.

Add the binary numbers 1011 and 0110.

The binary equivalent of the decimal number 13 is

A nibble consists of

Find the 4-bit two's complement of 0101.

Convert the hexadecimal number 2F to base ten.

Convert 1010 1010₂ to hexadecimal.

Convert 37₁₀ to binary.

Convert 25 (base 8) to base 10.

Convert 10110₂ to hexadecimal.

ASCII is a code used to represent

Convert 17 (base 8) to base 10.

The two's complement of 0011 (4 bits) is

Add the binary numbers 101 + 11.

Add the binary numbers 101 and 011.

Add 47₈ and 25₈, giving the answer in octal.

Convert 3F₁₆ to decimal.

Convert 2A (base 16) to base 10.

Convert 1101 (base 2) to base 10.

The hexadecimal digit F represents the denary value