AHJ: Unit13-User Defined Data Types and File Organization Quiz

What is a user-defined data type?

• A data type that references other data types

• A primitive data type built into the programming language

• A data type created by the programmer based on existing types

• A data type that only stores numeric values

Which of the following is an example of a non-composite data type?

• Record

• Set

• Enumerated data type

• Class

What is the purpose of a pointer data type?

• To store characters in memory

• To reference a memory location

• To define a list of unordered elements

• To represent a composite data type

How is an enumerated data type defined in pseudocode?

• TYPE TDays = ENUMERATION(Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday)

• ENUM TDays AS [Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday]

• TYPE ENUM TDays = Monday TO Sunday

• SET TDays = {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday}

What kind of operations can be performed on sets?

• Concatenation

• Intersection and union

• Dereferencing

• Hashing

What distinguishes a composite data type from a non-composite one?

• Composite data types refer to other data types in their definition.

• Non-composite data types store multiple values.

• Composite data types are built into programming languages.

• Non-composite data types are not used for special purposes.

What is a hashing algorithm used for in file access?

• To store files in alphabetical order

• To encrypt data in a file

• To calculate the address of a record in a file

• To merge two sequential files

Which file organization method is most efficient for temporary files?

• Random

• Sequential

• Serial

• Indexed

What is the key characteristic of a sequential file organization?

• Records are stored based on a hashing algorithm.

• Records are stored in the order of arrival.

• Records are stored in ascending order of the key field.

• Records are stored in alphabetical order.

In which scenario is direct file access preferable?

• Processing every record in a file for payroll

• Updating the phone number of a single customer

• Reading all transaction logs sequentially

• Appending records to a temporary file