Basic computer

#19. The number system which uses the numbers 0 to 9 followed by the letters A to F is:

• Aalpha numeric
• Bhexadecimal
• Coctal
• Dnumeric alpha

#4. The two types of binary logic are:

• Apositive and negative
• Bvariable and negative
• Cpositive and reversible
• Dvariable and reversible

#17. The computer language system which uses the base 16 is known as:

• Aseptagesimal
• Bhectadecimal
• Chexadecimal
• Doctal