Computer Science

a collection of attributes for a single entity

an entity is a single object, place, person or thing

properties or characteristics of an entity

a data structure that involves creating data pairings that can be located using a key

used to identify each attribute held in the dictionary

Records and dictionaries

This unit introduces pupils to the new data structures of records and dictionaries. They will develop a Caesar cipher encryption program using a dictionary as a cipher wheel. Pupils will explore how data can be read from and written to files and how this data can be used within a program.

Programming: dictionaries and data files

a property or characteristic of an entity

What will be the output of the following code?
```player = { "username" : "rockstar", "password" : "6goatsEating", "score" : 5328 }  
print(player["username"])```

a data structure that involves creating data pairings

How is a record typically represented in Python?

by reassigning a value using the key, e.g. `player["score"] = 9000`

How can you modify a value in a dictionary?

Which of the following correctly defines a list in Python?

Match the list operation with its description.

`["orange", "apple", "banana", "cherry"]`

`["apple", "banana", "cherry", "orange"]`

What will be the output of the following code?
```fruits = ["apple", "banana", "cherry"]
fruits.append("orange")
print(fruits)```

converts all letters in a string to uppercase

converts all letters in a string to lowercase

What does the `.upper()` method do in Python?

What will be the output of the following code?
```word = "PYTHON"
print(word[2])```

Strings can hold letters, numbers, and symbols, and they must be enclosed in {{}}.

Starter Quiz