Input/output And File Handling
Akopọ
Close a program and everything it was holding disappears. Every variable, every array, every record: gone the instant the process ends, because they lived in memory and memory is handed back. A high score that survives until tomorrow, a register that is still there next term, a saved game: all of them require the program to push its data across a boundary, out of itself and onto something that outlives it.
This lesson covers the three things the specification asks for. Obtaining user input from a keyboard, outputting data and information from a program to the computer display, and reading from and writing to a text file. You will learn why everything typed at a keyboard arrives as text whatever it looks like, how a program knows when a file has run out, and the difference between writing to a file and adding to one, which is the difference between saving today's readings and destroying every reading you ever took.
Awọn Afojusun
- Be able to obtain user input from a keyboard. Be able to output data and information from a program to the computer display. Be able to read/write from/to a text file.
Àwòrán ọpọlọ
A ti ṣe àwòrán kókó yìí kí o lè rí bí àwọn èrò ṣe so pọ̀.
Ṣí àwòrán ọpọlọ nínú áàpù
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Gba ohun èlò Green Bridge CBT sórí fóònù tàbí kọ̀mpútà rẹ fún gbogbo ilé ìkàwé IGCSE: ìwé ìdánwò àtijọ́, ìlànà ìdíwọ̀n, àwòrán èrò, káàdì ìkẹ́kọ̀ọ́ àti ẹ̀kọ́ ohùn.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Input/output And File Handling. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- What data type does a value obtained from a keyboard have before any conversion? A. Boolean B. Integer C. Real D. String Answer: D
- A program opens an existing text file in write mode. What happens to the data already in the file? A. It is kept and new data is added at the end B. It is kept and new data is added at the start C. It is destroyed D. The program refuses to open the file Answer: C
- Which loop structure is most appropriate for reading every line of a text file whose length is not known? A. A FOR loop from 0 to the number of lines B. A WHILE loop testing for the end of the file C. A FOR loop from 1 to 100 D. No loop is needed Answer: B
- Why should a program close a file it has written to? A. To force any buffered data out to the disk and release the file B. To convert the data into text C. To sort the contents of the file D. To make the file readable by a person Answer: A
- A program stores data in a file rather than in an array. What is the main advantage? A. The data can be sorted more quickly B. The data survives after the program ends C. The data does not need to be converted D. The data uses less memory while the program runs Answer: B
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Input/output And File Handling? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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