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PROBLEM SOLVING AND PYTHON PROGRAMMING QUIZ

1) What is the first step in problem-solving? A) Writing code B) Debugging C) Understanding the problem D) Optimizing the solution Answer: C 2) Which of these is not a step in the problem-solving process? A) Algorithm development B) Problem analysis C) Random guessing D) Testing and debugging Answer: C 3) What is an algorithm? A) A high-level programming language B) A step-by-step procedure to solve a problem C) A flowchart D) A data structure Answer: B 4) Which of these is the simplest data structure for representing a sequence of elements? A) Dictionary B) List C) Set D) Tuple Answer: B 5) What does a flowchart represent? A) Errors in a program B) A graphical representation of an algorithm C) The final solution to a problem D) A set of Python modules Answer: B 6) What is pseudocode? A) Code written in Python B) Fake code written for fun C) An informal high-level description of an algorithm D) A tool for testing code Answer: C 7) Which of the following tools is NOT commonly used in pr...

Streams

STREAMS ( Optional )
* The streams method  in UNIX gives a bi-directional pipeline between a user process and a device driver, onto which additional modules can be added.
* The user process conveys with the stream head.
* The device driver interconnects with the device end.
* Zero or additional stream modules can be pushed onto the stream, using ioctl( ). These modules may filter and/or edit the data as it passes through the stream.
* Every module has a read queue and a write queue.
* Flow control can be permissively supported, in which case each module will buffer data until the adjacent module is ready to receive it. Without flow control, data is moved along as soon as it is ready.
* User processes communicate with the stream head using neither read( ) and write() ( or putmsg( ) and getmsg( ) for message passing. )
* Streams I/O is asynchronous ( non-blocking ), other than for the interface between the user process and the stream head.
* The device driver must reply to interrupts from its device - If the adjacent module is not prepared to accept data and the device driver's buffers are all full, then data is typically dropped.
* Streams are mostly used in UNIX, and are the preferred approach for device drivers. For example, UNIX executes sockets using streams.
     Figure: The SREAMS structure.


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