Chapter 13 - 13 Data Representation - Flashcards

Front

Why are user-defined data types necessary in programming?

Back

They allow programmers to define data structures suited to specific problems.

Front

Example of a composite user-defined data type: Integer, Boolean, Structure, Character

Back

Structure

Front

When designing a user-defined data type, what should be considered first?

Back

The specific problem requirements

Front

Which file organisation method requires a record key to ensure that records are stored in order?

Back

Sequential

Front

What type of file access is suitable for random file organisation?

Back

Direct access

Front

Which of the following best describes a hashing algorithm?

Back

A process for mapping a key to a storage location

Front

When would you use a sequential file organisation method?

Back

When data is read or written in order

Front

What is the purpose of normalising floating-point numbers?

Back

To standardise the representation for precision and consistency

Front

What is the consequence of increasing the bits for the exponent in a floating-point number with 5 bits for the mantissa and 3 bits for the exponent?

Back

Increased range and reduced precision

Front

What is underflow in floating-point representation?

Back

A number is too small to be represented and is approximated as zero.