Binary, Decimal, Octal, and Hexadecimal Number Systems

1. : The binary number system uses which base?
(A) Base 2
(B) Base 8
(C) Base 10
(D) Base 16

2. : The decimal number system consists of how many digits?
(A) 2
(B) 8
(C) 10
(D) 16

3. : The octal number system uses digits from:
(A) 0 to 9
(B) 0 to 7
(C) 0 to 15
(D) 1 to 8

4. : The hexadecimal number system includes digits and letters up to:
(A) 9
(B) F
(C) E
(D) D

5. : What is the decimal equivalent of the binary number 1010?
(A) 8
(B) 9
(C) 10
(D) 12

6. : What is the hexadecimal equivalent of the decimal number 15?
(A) B
(B) D
(C) E
(D) F

7. : Which number system is most commonly used by computers to process data internally?
(A) Decimal
(B) Octal
(C) Binary
(D) Hexadecimal