JAMB and WAEC Computer Studies questions

548 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 441· Number systems and data representation· JAMB
The one's complement of 1011 is
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Answer: A. 0100
Explanation and discussion
Question 442· Number systems and data representation· WAEC
Convert 25 (base 10) to base 2.
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Answer: B. 11001
Explanation and discussion
Question 443· Number systems and data representation· JAMB
The binary-coded decimal (BCD) form of 59 is
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Answer: B. 0101 1001
Explanation and discussion
Question 444· Number systems and data representation· WAEC
In ASCII, the capital letter A is represented by the decimal code 65. Which code represents B?
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Answer: C. 66
Explanation and discussion
Question 445· Number systems and data representation· WAEC
The hexadecimal digit F represents the decimal number
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Answer: D. 15
Explanation and discussion
Question 446· Number systems and data representation· WAEC
Convert 10110 (base 2) to base 10.
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Answer: D. 22
Explanation and discussion
Question 447· Number systems and data representation· JAMB
Convert 65₈ to decimal.
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Answer: A. 53
Explanation and discussion
Question 448· Number systems and data representation· WAEC
Convert 25 (base ten) to binary.
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Answer: D. 11001
Explanation and discussion
Question 449· Number systems and data representation· WAEC
What is 64 (base ten) in octal?
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Answer: C. 100₈
Explanation and discussion
Question 450· Number systems and data representation· JAMB
The decimal value of the binary number 10110 is
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Answer: D. 22
Explanation and discussion
Question 451· Number systems and data representation· WAEC
Convert 3C (base 16) to base 10.
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Answer: A. 60
Explanation and discussion
Question 452· Number systems and data representation· JAMB
The octal number 17₈ written in decimal is
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Answer: B. 15
Explanation and discussion
Question 453· Number systems and data representation· JAMB
Convert 3F₁₆ to binary.
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Answer: C. 111111
Explanation and discussion
Question 454· Number systems and data representation· WAEC
Convert 13 (base 10) to binary.
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Answer: B. 1101
Explanation and discussion
Question 455· Number systems and data representation· JAMB
How many different values can 4 bits represent?
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Answer: A. 16
Explanation and discussion
Question 456· Number systems and data representation· WAEC
Data becomes information when it is
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Answer: B. processed into a meaningful form
Explanation and discussion
Question 457· Number systems and data representation· WAEC
The binary number system uses the digits
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Answer: A. 0 and 1
Explanation and discussion
Question 458· Number systems and data representation· JAMB
How many different values can be represented with 8 bits?
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Answer: C. 256
Explanation and discussion
Question 459· Number systems and data representation· WAEC
ASCII is a code for representing
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Answer: B. characters as numbers
Explanation and discussion
Question 460· Number systems and data representation· WAEC
The largest unsigned number that 8 bits can hold is
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Answer: D. 255
Explanation and discussion

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JAMB and WAEC Computer Studies questions

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

The binary number system uses the digits

How many different values can be represented with 8 bits?

ASCII is a code for representing

The largest unsigned number that 8 bits can hold is