What is the primary purpose of a hashing algorithm in file organisation?

To map data to a unique location for faster retrieval.

To sort records in alphabetical order.

To reduce the size of the file.

To encrypt sensitive data in the file.

Why do rounding errors occur when representing real numbers in binary?

Because the length of the binary representation is limited, leading to precision loss.

Because binary can only represent whole numbers.

Because binary numbers always have a decimal part.

Because real numbers cannot be stored in binary.

What is a common consequence of approximating real numbers using binary floating-point representation?

Accurate representation of all numbers

Which of the following is TRUE about file access methods?

Random access allows retrieval of any record without going through other records.

Sequential access is the fastest method of retrieving data.

Indexed access does not use keys for retrieval.

Hashing can only be used for text files.

When is normalisation of floating-point numbers typically necessary?

When performing arithmetic operations to maintain precision.

To convert integers into floating-point numbers.

When converting a floating-point number into a string.

To increase the number of decimal places in a number.

What is the primary advantage of using user-defined types in large software projects?

They help manage and organize data, making code more readable and maintainable.

They ensure more efficient memory usage.

They automatically optimize the execution speed of the program.

They reduce the size of the source code.

In which of the following scenarios would it be most appropriate to use an enumerated type?

Storing a list of car manufacturers (e.g., Ford, Toyota, BMW).

Storing the names and grades of students.

Creating a structure to represent a point in 3D space.

Storing a sequence of characters for a username.

Which of the following operations can be applied to non-composite data types?

Create a collection of related fields

Which of the following is an advantage of using sequential file organization?

Efficient for batch processing and simple to implement.

Fast access to any record in the file.

Suitable for frequently updated files.

Always provides the most efficient search.

Which of the following is true about the exponent in a floating-point number representation?

It determines how far the decimal point is shifted.

It determines the accuracy of the mantissa.

It represents the decimal part of the floating-point number.

What is the purpose of normalising a floating-point number?

To ensure a uniform representation where the first bit of the mantissa is non-zero.

To ensure the most accurate representation of the number.

To reduce the size of the number.

What is a potential issue when converting a decimal real number into binary floating-point representation?

Some real numbers cannot be represented exactly in binary, leading to approximation.

The number can become negative.

The decimal point is always lost.

The binary representation might be longer than the decimal.

Why do floating-point numbers sometimes suffer from precision loss?

Because only a limited number of bits are available to store the mantissa and exponent.

Because they can only represent positive numbers.

Because the sign bit always takes up too much space.

Because they only support whole numbers.

What is the consequence of overflow in a floating-point number representation?

The number becomes too large to be represented and may cause an error or infinity.

The number is truncated to the nearest integer.

The result is a loss of precision.

The number wraps around to the smallest possible value.

In which scenario would indexed file organisation be most appropriate?

Efficiently locating a record in a large database using a key.

Accessing records sequentially in a small file.

Storing binary data such as images and videos.

Writing records frequently with minimal search requirements.

Which of the following is true about user-defined types in object-oriented programming?

They allow defining custom methods and behaviors for specific data types.

They automatically inherit properties from built-in types.

They are only useful for arithmetic operations.

They reduce memory usage but increase processing time.

Why might a composite data type like a record be more useful than an array for certain problems?

Records allow storage of different data types in one structure.

Arrays are faster for storing data.

Records only work with numeric data.

What is the purpose of the hash function in a hashtable?

To generate a unique address or index for each input key.

To sort data in ascending order.

To compress data into smaller sizes.

In a binary floating-point number, what does the mantissa represent?

The fractional part of the number.

Which of the following operations can lead to a loss of precision in floating-point arithmetic?

Adding two large floating-point numbers

Storing an integer in a floating-point variable

What is the main issue when using floating-point representation for very small or very large numbers?

All real numbers can be perfectly represented

Which of the following scenarios could cause a rounding error in floating-point representation?

Adding two floating-point numbers that differ greatly in magnitude.

Converting a binary number to an integer.

Storing an integer as a floating-point number.

In file organisation, what is an overflow area used for?

To store records that do not fit in the main file area due to hash collisions.

To store large binary data such as images.

To compress records to save space.

To store extra copies of frequently accessed records.

Which of the following is an advantage of random file access?

It allows records to be retrieved or modified without reading the entire file.

It is the fastest method for sequential searches.

It ensures that all records are processed in a fixed order.

A Level 13.1 - 13.3 Quiz

45 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Why are user-defined types necessary in programming?

They provide a way to directly modify built-in types.

They allow programmers to create complex data structures that match specific requirements.

They reduce the performance of programs.

They limit the number of variables you can create.

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

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

Array

Record

Enumeration

LinkedList

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What is a composite data type?

A data type that consists of simple values only.

A data type that is built using other data types, allowing more complex structures.

A data type used exclusively for numeric operations.

A data type used to store text data only.

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following would be the most appropriate user-defined type to represent a 'Book' in a library system?

String

Boolean

Record (Title, Author, Year Published, ISBN)

Integer

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following is NOT a method of file organisation?

Sequential

Indexed

Hashing

Binary

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What method of file access is used when searching for records in a sequential file?

Direct access

Random access

Sequential access

Indexed access

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which method of file organisation is most appropriate for efficiently storing and retrieving data with large datasets using a unique key?

Sequential access

Hashing

Random access

Linked list

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A Level 13.1 - 13.3

Why are user-defined types necessary in programming?

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

What is a composite data type?

Which of the following would be the most appropriate user-defined type to represent a 'Book' in a library system?

Which of the following is NOT a method of file organisation?

What method of file access is used when searching for records in a sequential file?

Which method of file organisation is most appropriate for efficiently storing and retrieving data with large datasets using a unique key?

What is the primary purpose of a hashing algorithm in file organisation?

In a floating-point number, which part of the representation contains the exponent?

Convert the binary floating-point number 1.101 × 2^3 into its denary equivalent.

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