Data types and structures：練習題

Which of these is a primitive data type used to store a single keyboard character such as 'A' or '?'?

What would be the result of a substring operation on the string "ComputerScience" if the parameters were substring(4, 3) (using 0-based indexing where 4 is the start index and 3 is the length)?

A programmer needs to store data about a book, including its Title (String), Price (Real), and IsAvailable (Boolean). Which data structure allows these different data types to be stored together as a single entity?

Which of the following is considered a primitive data type used in programming?

A programmer needs to store a collection of 50 student names. Which data structure is most appropriate for storing this data under a single identifier?

State the most appropriate primitive data type for storing whether a user has agreed to the terms and conditions of a website.

A program needs to store the names of 30 students in a class. Identify the most efficient data structure to use and state its dimension.

Given a string variable \( S = "Edexcel" \), determine the result of a substring operation that extracts 4 characters starting from index 2.

A programmer is writing a script to calculate the area of a circle. The user needs to provide the radius as a decimal number.

(a) Identify the most appropriate data type for the variable radius.
(b) Write a line of code that takes a user's input and stores it as this data type.

An array named scores contains the following values: [45, 67, 12, 89, 34].

(a) State the 0-based index of the value 12.
(b) Write a pseudocode loop that iterates through every item in this array and outputs only scores greater than 50.
(c) Identify the data structure used for scores and state if it is static or dynamic in typical implementation.