Magento uses two level cache backend . Two level cache means it stores cache records in two backend. By default, Magento stores it's cache entries in the file system, magento cache files are present in var/cache. At the time of development it is recommended to turn off the cache to see the change you have made without waiting for cache.
To disable cache go to System > Cache Management.
There, disable all the cache as you can see in below picture.
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