GCSE AQA Computer Science Designing, Creating & Refining Algorithms: Define the term algorithm.

A se

Question

Define the term algorithm.

A sequence or series of steps or instructions that can be followed to complete a task or solve a problem.

The variable x is assigned a value using the statement:
x ← LEN(state)
Using Figure 1, what is the value of x?
Shade one lozenge.

The length of the string 'California' is 10, so the value of x is 10.

What is the result of concatenating the contents of the variables city and landmark in Figure 1?
Shade one lozenge.

Concatenating 'San Francisco' and 'Alcatraz Island' results in 'San FranciscoAlcatraz Island'.

The subroutine SUBSTRING extracts characters from a given string.
For example, SUBSTRING(3, 5, 'Computing') would return 'put'.
The variable y is assigned a value using the statement:
y ← SUBSTRING(4, 7, landmark)
Using Figure 1, what is the value of y?
Shade one lozenge.

Applying the substring operation from position 4 to 7 in 'Alcatraz Island' yields 'tra'.

The subroutine POSITION finds the first position of a character in a string.
For example, POSITION('Computing', 'p') would return 3.
The variable z is assigned a value using the statement:
z ← POSITION(landmark, 't')
Using Figure 1, what value is assigned to z?
Shade one lozenge.

The character 't' first appears in 'Alcatraz Island' at position 6, so z is assigned the value 6.

Define the term algorithm - AQA - GCSE Computer Science - Question 1 - 2023 - Paper 1

Worked Solution & Example Answer:Define the term algorithm - AQA - GCSE Computer Science - Question 1 - 2023 - Paper 1

Define the term algorithm.

Using Figure 1, what is the value of x?

What is the result of concatenating the contents of the variables city and landmark in Figure 1?

Using Figure 1, what is the value of y?

Using Figure 1, what value is assigned to z?

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