Computer Systems Quiz

Explain why a computer system can only process data in binary form.

Two 8-bit binary values are given. Add the two 8-bit binary values. Give your answer in binary. Show all your working.

Two 8-bit binary values are added. The result of this calculation needs to be stored in an 8-bit register. The denary result of this calculation is 301. This generates an error. State the name of this type of error and explain why this error occurs.

The contents of three binary registers have been transmitted from one computer to another. Even parity has been used as an error detection method. The outcome after transmission is: No errors have been detected in Register A and Register C. An error has been detected in Register B. Complete the parity bit for each register to show the given outcome.

A student uses a laptop and a calculator for schoolwork. The laptop has a central processing unit (CPU) that performs the fetch–decode–execute cycle. The CPU has several components, including the memory data register (MDR) and the arithmetic logic unit (ALU). Describe how the MDR and the ALU are used in the fetch–decode–execute cycle.

The calculator has an embedded system. Describe what is meant by an embedded system.

Both the laptop and the calculator have read only memory (ROM). State one reason why both devices have ROM.

Identify a security solution that could be used to protect the computer from a computer virus, hacking and spyware. Each security solution must be different.

Describe how each security solution you identified in (a) will help protect the computer. Computer virus security solution Hacking security solution Spyware security solution

Complete the statements about different types of programming language. The structure of language statements in a computer program is called the A programming language that uses natural language statements is called a When programs are written in this type of language they need a to convert them into A programming language that is written using mnemonic codes is called an This is an example of a