Chapter 13 - Revision history

Laura: /* Quick Quiz 13.4 */

2013-08-16T17:18:43Z

Quick Quiz 13.4

← Older revision		Revision as of 17:18, 16 August 2013
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	NEXT:[[Chapter 14]]		NEXT:[[Chapter 14\|The SEQUENTIAL method of access with INTERNAL files]]

	[[BR Tutorial\|Back to Index]]		[[BR Tutorial\|Back to Index]]

Laura at 01:18, 16 July 2013

2013-07-16T01:18:08Z

← Older revision		Revision as of 01:18, 16 July 2013
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	<noinclude>		<noinclude>
	[[Category:Tutorial]]		[[Category:Tutorial 1]]
	</noinclude>		</noinclude>

Laura: /* Quick Quiz 13.4 */

2013-07-15T21:05:05Z

Quick Quiz 13.4

← Older revision		Revision as of 21:05, 15 July 2013
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	[[BR Tutorial\|Back to Index]]		[[BR Tutorial\|Back to Index]]

			<noinclude>
			[[Category:Tutorial]]
			</noinclude>

Laura: /* Quick Quiz 13.4 */

2013-07-03T20:52:51Z

Quick Quiz 13.4

← Older revision		Revision as of 20:52, 3 July 2013
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	====Quick Quiz 13.4====		====Quick Quiz 13.4====
	~~1a)~~ What are each of the following statements is used for? <br>		1. What are each of the following statements is used for? <br>

	{\|		{\|
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	\|}		\|}

	~~1b)~~ What must the READ statement (sometimes called READ #filenum) always have following the space after the READ keyword? <br>		2. What must the READ statement (sometimes called READ #filenum) always have following the space after the READ keyword? <br>
	a) a comma (,). <br>		a) a comma (,). <br>
	b) an asterisk (*). <br>		b) an asterisk (*). <br>
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	d) a dollar sign ($). <br>		d) a dollar sign ($). <br>

	Answers~~: <br>~~		[[Answers 13.4]] <br>
	~~1a) 1~~.~~b; 2.d; 3.a;~~ 4.c <br>
	~~1b) c~~

	NEXT:[[Chapter 14]]		NEXT:[[Chapter 14]]

	[[BR Tutorial\|Back to Index]]		[[BR Tutorial\|Back to Index]]

Laura: /* Quick Quiz 13.3 */

2013-07-03T20:51:47Z

Quick Quiz 13.3

← Older revision		Revision as of 20:51, 3 July 2013
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	====Quick Quiz 13.3====		====Quick Quiz 13.3====
	1) Sequential Access allows you to: <br>		1) Sequential Access allows you to: <br>

	a) Access every single record in a data file in the same order that the records were entered. <br>		a) Access every single record in a data file in the same order that the records were entered. <br>
	b) Use the file pointer to locate the record you want. <br>		b) Use the file pointer to locate the record you want. <br>
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	2) If you know which record of information you would like to use, which method would be the most efficient to use? <br>		2) If you know which record of information you would like to use, which method would be the most efficient to use? <br>

	a) the keyed method. <br>		a) the keyed method. <br>
	b) the sequential method. <br>		b) the sequential method. <br>
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	d) the relative method. <br>		d) the relative method. <br>

	~~Answers:~~ <br>		[[Answers13.3]] <br>
	~~1.a; 2.d~~

	===13.4 Manipulating the data file===		===13.4 Manipulating the data file===

Laura: /* Quick Quiz 13.2 */

2013-07-03T20:51:00Z

Quick Quiz 13.2

← Older revision		Revision as of 20:51, 3 July 2013
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	3. In the data file DISFILE, how many records are there? <br>		3. In the data file DISFILE, how many records are there? <br>

	Answers: <br>		[[Answers 13.2]] <br>
	~~1. True; 2.c; 3. 5;~~

	===13.3 The three methods of access===		===13.3 The three methods of access===

Laura: /* Quick Quiz 13.1 */

2013-07-03T20:50:30Z

Quick Quiz 13.1

← Older revision		Revision as of 20:50, 3 July 2013
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	8. True or False: It is impossible to change the information in a display file.		8. True or False: It is impossible to change the information in a display file.

	Answers: <br>		[[Answers 13.1]] <br>
	~~1-b; 2-a; 3-c; 4-b; 5-c; 6-c; 7-c; 8-False.~~

	===13.2 Structure of a data file===		===13.2 Structure of a data file===

Laura: /* How do programs use data files? */

2013-05-17T15:27:18Z

How do programs use data files?

← Older revision		Revision as of 15:27, 17 May 2013
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	When a program opens a file to get information that it needs, the file is open for input (because the file will input information into the program). When a program opens a file to send it new information, the file is open for output (because the program will output information to the file). When a program opens an internal file to change information that is already there, the program is open for outin (because the current information will be input into the program, and the changed information will output back to the program, and the changed information will output back to the data file). Internal files can be opened for outin, whereas display files cannot. (The information in display files can still be changed, but through a technique you will learn about in the display files chapter.)		When a program opens a file to get information that it needs, the file is open for input (because the file will input information into the program). When a program opens a file to send it new information, the file is open for output (because the program will output information to the file). When a program opens an internal file to change information that is already there, the program is open for outin (because the current information will be input into the program, and the changed information will output back to the program, and the changed information will output back to the data file). Internal files can be opened for outin, whereas display files cannot. (The information in display files can still be changed, but through a technique you will learn about in the display files chapter.)

	[[IMAGE:program.png\|~~400px~~]]		[[IMAGE:program.png\|300px]]

	It is important for you to be clear on the meanings of the word input and output; beginning (and advanced!) programmers frequently get them mixed up. It may help you to think of the program on the screen as the central processing point. Information can be input into this program, or it can be output from this program.		It is important for you to be clear on the meanings of the word input and output; beginning (and advanced!) programmers frequently get them mixed up. It may help you to think of the program on the screen as the central processing point. Information can be input into this program, or it can be output from this program.

Laura: /* How do programs use data files? */

2013-05-17T15:27:04Z

How do programs use data files?

← Older revision		Revision as of 15:27, 17 May 2013
Line 50:		Line 50:
	When a program opens a file to get information that it needs, the file is open for input (because the file will input information into the program). When a program opens a file to send it new information, the file is open for output (because the program will output information to the file). When a program opens an internal file to change information that is already there, the program is open for outin (because the current information will be input into the program, and the changed information will output back to the program, and the changed information will output back to the data file). Internal files can be opened for outin, whereas display files cannot. (The information in display files can still be changed, but through a technique you will learn about in the display files chapter.)		When a program opens a file to get information that it needs, the file is open for input (because the file will input information into the program). When a program opens a file to send it new information, the file is open for output (because the program will output information to the file). When a program opens an internal file to change information that is already there, the program is open for outin (because the current information will be input into the program, and the changed information will output back to the program, and the changed information will output back to the data file). Internal files can be opened for outin, whereas display files cannot. (The information in display files can still be changed, but through a technique you will learn about in the display files chapter.)

	[[IMAGE:program.png]]		[[IMAGE:program.png\|400px]]

	It is important for you to be clear on the meanings of the word input and output; beginning (and advanced!) programmers frequently get them mixed up. It may help you to think of the program on the screen as the central processing point. Information can be input into this program, or it can be output from this program.		It is important for you to be clear on the meanings of the word input and output; beginning (and advanced!) programmers frequently get them mixed up. It may help you to think of the program on the screen as the central processing point. Information can be input into this program, or it can be output from this program.

Laura: /* Quick Quiz 13.4 */

2013-05-17T15:26:19Z

Quick Quiz 13.4

← Older revision		Revision as of 15:26, 17 May 2013
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	1a) 1.b; 2.d; 3.a; 4.c <br>		1a) 1.b; 2.d; 3.a; 4.c <br>
	1b) c		1b) c

			NEXT:[[Chapter 14]]

			[[BR Tutorial\|Back to Index]]