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 21· Number systems and data representation· JAMB
Convert 56₈ to base ten.
Explanation and discussion
Question 22· Number systems and data representation· JAMB
Unicode was developed to
Explanation and discussion
Question 23· Number systems and data representation· JAMB
A parity bit is added to data in order to
Explanation and discussion
Question 24· Number systems and data representation· JAMB
Convert 45 (base ten) to binary.
Explanation and discussion
Question 25· Number systems and data representation· JAMB
The one's complement of 1011 is
Explanation and discussion
Question 26· Number systems and data representation· WAEC
Convert 25 (base 10) to base 2.
Explanation and discussion
Question 27· Number systems and data representation· JAMB
The binary-coded decimal (BCD) form of 59 is
Explanation and discussion
Question 28· 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 29· Number systems and data representation· WAEC
The hexadecimal digit F represents the decimal number
Explanation and discussion
Question 30· Number systems and data representation· WAEC
Convert 10110 (base 2) to base 10.
Explanation and discussion
Question 31· Number systems and data representation· JAMB
Convert 65₈ to decimal.
Explanation and discussion
Question 32· Number systems and data representation· WAEC
Convert 25 (base ten) to binary.
Explanation and discussion
Question 33· Number systems and data representation· WAEC
What is 64 (base ten) in octal?
Explanation and discussion
Question 34· Number systems and data representation· JAMB
The decimal value of the binary number 10110 is
Explanation and discussion
Question 35· Number systems and data representation· WAEC
Convert 3C (base 16) to base 10.
Explanation and discussion
Question 36· Number systems and data representation· JAMB
The octal number 17₈ written in decimal is
Explanation and discussion
Question 37· Number systems and data representation· JAMB
Convert 3F₁₆ to binary.
Explanation and discussion
Question 38· Number systems and data representation· WAEC
Convert 13 (base 10) to binary.
Explanation and discussion
Question 39· Number systems and data representation· JAMB
How many different values can 4 bits represent?
Explanation and discussion
Question 40· Number systems and data representation· WAEC
Data becomes information when it is
Explanation and discussion

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

Convert 56₈ to base ten.

Unicode was developed to

A parity bit is added to data in order to

Convert 45 (base ten) to binary.

The one's complement of 1011 is

Convert 25 (base 10) to base 2.

The binary-coded decimal (BCD) form of 59 is

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 65₈ to decimal.

Convert 25 (base ten) to binary.

What is 64 (base ten) in octal?

The decimal value of the binary number 10110 is

Convert 3C (base 16) to base 10.

The octal number 17₈ written in decimal is

Convert 3F₁₆ to binary.

Convert 13 (base 10) to binary.

How many different values can 4 bits represent?

Data becomes information when it is