A and an are different forms of the same word, the indefinite article that often precedes a noun. A is used before a noun that starts with a consonant sound (e.g., “s,” “t,” “v”). An is used before a noun that starts with a vowel sound (e.g., “a,” “o,” “i”). https://azuretrainings.in/azure-data-engineer-training-in-hyderabad/