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Module quiz: Introduction to data structures Quiz Answers

Question 1)
What do TSV files use to separate their data?

• Topic
• Types
• Tabs

Question 2)
Arrays are always stored on the stack?

• Yes, but only through making a shallow-copy.
• Yes, but only through making a deep-copy.
• No

Question 3)
What happens when you try to retrieve a value using a number greater than the index size?

• It would return a warning and a message indicating the issue.
• It would throw an error.
• Nothing. There would be nothing to retrieve so it would return null.

Question 4)
In relation to computer science, what is a class?

• It is a blueprint for an object.
• It is the thing from which arrays are build.
• An object that has functionality.

Question 5)
In relation to objects, what are instance variables?

• An attribute that has an immediate impact when compiled.
• Attributes that can take on many forms.
• Characteristics of the class.

Question 6)
How many children can a node in a binary tree have?

• 2
• 1
• 4

Question 7)
Which of the following uses a FIFO approach.

• Lists
• Stacks
• Queues

Question 8)
In relation to data structures what does synchronization mean?

• Relates to a measured way of increasing the size of an object.
• It is something to do with swimming.
• Making a class thread safe.

Question 9)
Why do you need to implement a comparator when storing objects on a tree?

• To ensure that values don’t clash when being added to a tree.
• As a means of comparing objects so the tree knows which node to store an object on.
• So that the compiler can know to keep the tree balanced by comparing a number of nodes.

Question 10)
Why are heaps called heaps?

• Because they store a selection of different data types.
• The order of importance is determined by where in the data structure the information is found.
• The organization of their data is done in a very loose way, so it is said that the elements are heaped together.