Option A does not come under a survey because survey refers to research of collecting data about a particular topic and do insights with the collected data and then convert that an information. But option A does not research or collect data, it speaks about events and happenings.
Whereas, Option B collects information from group of people and then a decision is made. So it is a survey.
When we analyze option C, once again it collects data about the people’s mind. So it comes under survey.
Answer: C. Swap File
Explanation: Swap files provide some space for programs for the computer and virtual memory.
Answer:
1. Scanner = reading passports.
2. Barcode reader = automatic stock control.
3. pH sensor = monitor soil in a greenhouse.
4. Microphone = voice recognition.
Explanation:
1. Scanner: Copies paper documents and converts the text and pictures into a computer-readable form. Therefore, it can be used for reading passports.
2. Barcode reader: reads labels containing parallel dark and light lines using laser light or LEDs; the width of each line represents a binary code. Therefore, it is used for automatic stock control.
3. pH sensor: detect changes in acidity levels; data is often in analogue form. Thus, it is typically used to monitor soil in a greenhouse.
4. Microphone: allows audio signals to be converted into electric signals; these can be interpreted by a computer after being converted into digital form. Microphones are used for voice recognition.
A warranty is a statement given by the manufacturer or other company
