File Handling
Overview
When a program stops, everything it was holding in memory vanishes. So how does a game remember your progress, or a program keep a high score between sessions? The answer is file handling: writing data out to a file that survives after the program ends, and reading it back when the program runs again.
In this lesson you will learn why programs store data in files, then learn the standard pseudocode for opening, reading from, writing to and closing a file. You will trace small routines that save and reload data so you can write file-handling code with confidence in the exam.
Objectives
- 1 Understand the purpose of storing data in a file to be used by a program
- 2 Open, close and use a file for reading and writing
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Flashcards
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on File Handling. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Why does a program store data in a file rather than only in a variable? A. files run faster than variables B. data in a variable is lost when the program ends, but a file keeps it C. variables cannot hold numbers D. files do not need to be opened Answer: B
- Which pseudocode keyword opens a file ready to read from it? A. WRITEFILE B. CLOSEFILE C. OPENFILE name FOR READ D. EOF Answer: C
- What does opening a file FOR WRITE do to data already in the file? A. appends to the end B. leaves it unchanged C. overwrites it D. encrypts it Answer: C
- Which statement saves changes and frees a file after use? A. OPENFILE B. READFILE C. WRITEFILE D. CLOSEFILE Answer: D
- What does EOF(name) return when the end of the file is reached? A. the last line B. FALSE C. TRUE D. the filename Answer: C
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