Number System

Since computers only understand an electrical current being either on or off, it needs to use patterns of ones and zeros representing on or off as its own language.

• Denary

• Hexadecimal

• Binary

• Octal

It is used to represent colours among other data.

• Binary

• Denary

• Octal

• Hexadecimal

They are an essential part of all computer circuits, as they determine how binary data is processed – in other words, how it is understood, transformed and used.

• Logic gates

• Registers

• Number System

• Input and Output

It does not perform any logical operation; it just ensures that the output signal matches the input signal.

• Buffer

• NOT

• OR

• AND

What is the name of the digital logic gate that produces an output of '1' only when all of its input signals are '1', and otherwise outputs '0'?

• Buffer

• NOT

• OR

• AND

Which basic digital logic gate produces an output that is the inverse of its input, meaning it outputs '0' when the input is '1' and vice versa?

• Buffer

• NOT

• OR

• AND

What is the name of the elementary digital logic gate that gives an output of '1' if at least one of its input signals is '1', and only outputs '0' when all input signals are '0'?

• Buffer

• NOT

• OR

• AND

A small but quickly accessible memory location available to a computer’s Central Processing Unit (CPU).

• Register

• RAM

• ROM

• Logic Gate

What is the decimal (denary) equivalent of the binary number 10111111?

• 191

• 192

• 193

• 194

Convert the binary number 11001010 to its decimal (denary) equivalent.

• 199

• 200

• 201

• 202