Y1 A Level Computer Science Quiz - AQA

Process which adds an element to a stack

• Pop

• Enqueuing

• Peeking

• Push

Definition of stack underflow

• Push on full stack

• Pop on empty stack

• Push on empty stack

• Pop on full stack

What does a while loop do?

• runs a part of the code while another part is running

• repeats a part of the code while a condition is true

• Makes a condition true while a part of the program is running

• Allows you to change that part of the code while the program is running

Which line contains the error?

1     bool Run = true;

2     while (Run = true)

3     {string attempt = Console.ReadLine();

4      if (attempt = "beans")

5      { Run = false;}}

• 1

• 2

• 5

• 3

What type of tree can have at most 2 child nodes?

• Oak Tree

• Rooted Tree

• Binary Tree

• Trigonome Tree

Which tree traversal method visits the root at the end of the Algorithm?

• Climbing

• Postorder

• Inorder

• Preorder

What is common in the three different types of traversals?

• Root is visited before right subtree

• Left subtree is always visited before the right subtree

• Root is visited after left subtree

• All of the above

Which of these is NOT a traversal method?

• Postorder 

• Preorder 

• Inorder 

• Backorder  

What is polymorphism?

• A subclass overwriting a parent's method.

• A parent class providing methods for a child class.

• Overwriting methods to take many different data types as arguments.

• Using generic data types to create multipurpose implementations.

What are parameters? (Pick 3)

• a named variable passed into a function.

• an argument used in functions/procedures.

• a quantity that influences the output of a mathematical object but is viewed as being held constant.

• always required when initializing