Dear Shyamlal,
Food Inspector is an official that analyses the safety and quality of food products, the ingredients that are used for the production of the food products as well as the hygiene of equipment used and the place where these products are produced.
The entrance exam is highly competitive and top notch. The eligibility for this exam is 12th standard with PCM combination (Physics, Chemistry and Maths). Their is huge scope in this field like you can be hired for Food Scientist, Dairy Technologist, Quality Inspector. Workplace can be any restaurant, Office, Food Processing Factories etc.
You can visit the link below for more details- https://www.careers360.com/careers/food-inspector
Hope this helps.
All the Best :)
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