AQA GCSE Computer Science -3.1.1 Representing algorithms

An algorithm is defined as …

• A set of instructions used to complete a task
• A set of steps
• A task
• A mathmatical constant with variables

Decomposition is defined as…

• The breaking down of a problem into its different parts.
• The separation of different problems
• Completing sub problems seperately
• The subproblems contained in a problem

Abstraction is…

• The removal of unnecessery data or information
• The removal of parts of an algorithm
• The addition of data or information to a problem
• The understanding of a problem

What will be outputted by the following algorithm? [x=1, x=+3, x = x MOD 2, print(x)]

• 0
• x
• "0"
• "x"

What can be abstracted from the following algorithm? [x=0 , a = 2, b = 12, x=a-b, print(x)]

• x = 0
• a = 2
• b = 12
• print(x)

Which of the following is an algorithm for showing the whether forcast for a location after decomposition?

• Find location of device, send request for forcast, receive forcast, display forcast
• Send request for forcast, display forcast
• receive forcast, display forcast
• Send request for forcast, receive forcast, display forcast

Which of the following constitutes an algorithm?

• a = 1, b = 2, c = 3, d = b*c, e = d+a, print(e)
• a = 1, b = 2, c = 3
• a = 1, b = 2, c = 3, print("e")
• a = 1, print(a)

What should not have been abstracted from the following algorithm? [a = 1, x= a + x, print(x)]

• The initial value of x
• The value of x
• The value of X
• The value of b

What can be abstracted from the following algorithm? [x=3, a = 1, b = 2, x = a + x, print(x)

• The variable b
• The value 2
• print(x)
• The initial value of x

What are the minimum required components of an algorithm?

• A variable, and a manipulation of the variable
• A variable, manipulating the variable and outputting the variable
• A variable, an input, manipulating the varible and an output
• A variable and an output