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What is sequential access of a file? Explain direct access method. Classify the IO stream functions. Explain IO stream class hierarchy. Explain formatted and unformatted

What is sequential access of a file? Explain direct access method. Classify the IO stream functions. Explain IO stream class hierarchy.

Explain formatted and unformatted IO functions with examples. Explain what is stream state and flags used by C++. Explain IO manipulators available in C++.

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