Chapter 3 : Input and Output

What component is considered the "brain" of the computer?

• ROM

• RAM

• Microprocessor

• Hard Disk

Answer explanation

The microprocessor (or CPU) carries out program instructions.

Which memory type loses data when power is turned off?

• ROM

• Flash Memory

• RAM

• Hard Drive

Answer explanation

RAM is volatile and requires power to maintain data.

What is the correct order of the machine cycle?

• Decode → Fetch → Execute → Store

• Fetch → Decode → Execute → Store

• Store → Fetch → Decode → Execute

• Execute → Store → Fetch → Decode

What is the function of the Control Unit in a CPU?

• Stores data

• Executes instructions

• Controls all operations

• Handles arithmetic only

Answer explanation

The control unit directs how data moves within the CPU.

What type of memory can retain data even when the power is off?

• RAM

• Cache

• ROM

• Virtual Memory

Answer explanation

ROM is non-volatile and stores permanent instructions.

What does NFC stand for?

• Near Field Communication

• Network Frequency Coding

• Non-Formatted Communication

• Native File Connector

Answer explanation

NFC enables short-range data transmission (e.g., Google Wallet).

Which device uses radio waves to scan items without physical contact?

• MICR

• Barcode Scanner

• RFID Reader

• Touch Screen

Answer explanation

RFID allows scanning via radio waves without touching the object.

A dot-matrix printer is an example of impact printer.

• True
• False

Which of these is NOT an input device?

• Keyboard

• Mouse

• Speaker

• Scanner

What is the purpose of a surge protector?

• Improve WiFi

• Extend battery life

• Protect hardware from power surges

• Store backups

Answer explanation

It guards against voltage spikes that may damage devices.