DATABASE FUNDAMENTALS
BASICS OF BIG DATA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A type that represents sequences of characters.
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One of the values on which an operator operates.
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A type that represents whole numbers.
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A combination of variables, operators, and values that represents a single result value.
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Detailed explanation-1: -A string is generally considered as a data type and is often implemented as an array data structure of bytes (or words) that stores a sequence of elements, typically characters, using some character encoding.
Detailed explanation-2: -A string is a sequence of characters. You can access the characters one at a time with the bracket operator: »> fruit = ‘banana’ »> letter = fruit[1] The second statement extracts the character at index position 1 from the fruit variable and assigns it to the letter variable.
Detailed explanation-3: -A CharSequence is a readable sequence of char values. This interface provides uniform, read-only access to many different kinds of char sequences. A char value represents a character in the Basic Multilingual Plane (BMP) or a surrogate.
Detailed explanation-4: -Character strings are the most commonly used data types. They can hold any sequence of letters, digits, punctuation, and other valid characters. Typical character strings are names, descriptions, and mailing addresses.