Chapter 16 Data representation

Question 1

Which are the User defined data types?

Answer 1

Non-Composite user-defined data types

Composite user-defined data types

Question 2

Why is it important to use user-defined data types?

Answer 2

To define the type of data is crucial in bigger codes for eviting errors

Question 3

What data types are non-composite user-defined data types?

Answer 3

Enumerated data type - containing a list of possible values

Pointed data type - used to reference a memory location

Question 4

What data types are composite user-defined data types?

Answer 4

Record data type - can contain data that have different data types when these form a coherent whole.
Set data type - allows a program to create sets and to apply the mathematical operations defined in set theory

Question 5

What is a binary file?

Answer 5

A file coded in binary code that can be easily read by a computer.

Question 6

What is a record?

Answer 6

A collection of fields containing data values

Question 7

What is a sequential file?

Answer 7

A sequential file is similar to serial files but the records are ordered.

Question 8

What does file access mean?

Answer 8

The editing or viewing of a file

Question 9

How do you differenciate negative numbers from positive ones?

Answer 9

By looking at the first number. If the first number is 1 than the number is negative and if it is 0 than it is positive.