3.1 Computers and Their Components Cambridge iAS 9618

What is the main purpose of secondary storage in a computer?

• To store data permanently when the computer is turned off

• To process instructions and execute programs

• To temporarily hold data for quick access

• To provide power to hardware components

Which of the following is a key characteristic of an embedded system?

• It is designed for a specific function within a larger system

• It can run multiple applications simultaneously

• It requires frequent software updates like general-purpose computers

• It always has a graphical user interface

What is a benefit of an embedded system?

• It is optimized for efficiency and reliability

• It can easily be reprogrammed for different tasks

• It always has a high level of user customization

• It uses a standard operating system like a desktop computer

How does a laser printer produce images and text?

• It uses a laser beam to create an electrostatic image on a drum, which attracts toner to be transferred onto paper

• It sprays tiny ink droplets onto paper

• It carves text and images into paper using a heated stylus

• It etches content onto metal plates before printing

What is a key difference between a magnetic hard disk and solid-state memory?

• Solid-state memory has no moving parts, making it faster and more durable

• Magnetic hard disks are smaller and use less power than solid-state memory

• Solid-state memory requires constant power to retain data

• Magnetic hard disks store data using electrical charges instead of magnetism

What is an advantage of a 3D printer?

• It can create complex physical objects directly from digital models

• It prints on paper faster than a laser printer

• It only requires a single type of material for all prints

• It is more cost-effective than traditional manufacturing methods

What is the function of a buffer in a computer system?

• It temporarily holds data to compensate for speed differences between devices

• It increases the overall processing speed of a CPU

• It permanently stores frequently used files

• It connects multiple hardware components

What is the primary function of RAM in a computer?

• To temporarily store data and instructions for quick access by the CPU

• To provide long-term storage for files and programs

• To control hardware components like the keyboard and display

• To manage the power supply of the computer

How does ROM differ from RAM?

• ROM is non-volatile, meaning it retains data even when power is lost

• ROM stores data temporarily for running applications

• RAM is used only for booting the operating system

• RAM cannot be upgraded, while ROM can

What is a key difference between SRAM and DRAM?

• SRAM is faster and does not need to be refreshed continuously

• DRAM is non-volatile and retains data after power loss

• SRAM is used as the main memory in most computers

• DRAM requires more power than SRAM