
IGCSE CS Chapter 1 - 3 Theory
Quiz
•
Computers
•
9th - 12th Grade
•
Practice Problem
•
Easy
John Akorli
Used 11+ times
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85 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which numbering system is used in computers?
Binary
Decimal
Octal
Hexadecimal
Answer explanation
The binary numbering system, which uses only 0s and 1s, is the fundamental language of computers. All data and instructions are ultimately represented in binary, making it the correct choice.
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the base of the hexadecimal system?
2
8
10
16
Answer explanation
The hexadecimal system is a base-16 numeral system, which means it uses 16 distinct symbols (0-9 and A-F) to represent values. Therefore, the correct answer is 16.
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which bit is the most significant in a binary number?
Rightmost
Leftmost
Middle
None
Answer explanation
In a binary number, the leftmost bit is the most significant because it represents the highest value. Each bit to the right represents progressively lower values, making the leftmost bit crucial for determining the overall value.
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the decimal equivalent of hexadecimal 'A'?
8
9
10
11
Answer explanation
The hexadecimal 'A' represents the decimal value 10. In hexadecimal, the digits range from 0-9 and then A-F, where A corresponds to 10. Therefore, the correct answer is 10.
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
How do you convert binary to decimal?
Divide by 2
Multiply by 2
Use powers of 2
Subtract 2
Answer explanation
To convert binary to decimal, use powers of 2. Each binary digit represents a power of 2, starting from the rightmost digit (2^0). Multiply each digit by its corresponding power and sum the results to get the decimal value.
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the largest value that can be stored in 4 bits?
7
8
15
16
Answer explanation
In 4 bits, the maximum value is calculated as 2^4 - 1, which equals 15. This is because each bit can be either 0 or 1, allowing for values from 0 to 15. Therefore, the largest value that can be stored in 4 bits is 15.
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which of the following is a method of binary addition?
Decimal Expansion
Bitwise Addition
Carry Method
Hex Shift
Answer explanation
The Carry Method is a technique used in binary addition where bits are added together, and if the sum exceeds 1, a carry is generated to the next higher bit. This method is fundamental to binary arithmetic.
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