1.2.1 Writing algorithms using:

• What is an algorithm designed to accomplish?

  Solve a specific problem
• One step in making toast according to the given algorithm is to plug in the toaster.


  True
• What is the purpose of decomposition in algorithm design?

  Break down complex problems
• Decomposing problems makes algorithms more efficient and easier to understand.

  True
• A sequence structure ensures that steps are executed in a specific order.
• Why is decomposition an essential skill in algorithm design?

  Tackle problems step-by-step
• A sequence structure executes steps one after the other in the order they appear.

  True
• Selection structures in algorithm design allow for decision-making.
• The if-else structure executes a different set of instructions depending on whether the condition is true or false.


  True
• The if structure checks a condition and executes instructions if the condition is true
• What keyword is used in the if structure to check a condition?

  if
• Arrange the following steps in the correct order to determine the larger of two numbers using an if-else structure.

  1️⃣ Check if num1 > num2

  2️⃣ If true, print "The larger number is " + num1

  3️⃣ Else, print "The larger number is " + num2
• A for loop is used when the number of iterations is known in advance
• What are the three characteristics of an algorithm?

  Clear, ordered, and sequenced
• What is the process of breaking down a complex problem into smaller parts called?

  Decomposition
• A sequence structure ensures that steps are executed in the order they appear in the algorithm.


  True
• What is the most basic type of control structure in algorithm design?

  Sequence structure
• Steps in a sequence structure to calculate the area of a rectangle

  1️⃣ Input the length of the rectangle

  2️⃣ Input the width of the rectangle

  3️⃣ Calculate the area by multiplying length and width

  4️⃣ Display the calculated area
• The 'if' structure executes instructions only if the condition is true.


  True
• Match the selection structure with its definition:

  if ↔️ Executes instructions if condition is true

  if-else ↔️ Executes one set of instructions if condition is true, another if condition is false
• A 'for' loop is used when the number of iterations is known in advance
• Steps in a 'for' loop

  1️⃣ Initialization

  2️⃣ Condition

  3️⃣ Execution

  4️⃣ Increment
• Functions reduce code redundancy and improve readability.

  True
• Using functions allows code to be reused multiple times
• Good comments should explain the purpose of the algorithm, its logic flow, and key variables.


  True
• What is the process called that involves breaking down a complex problem into smaller sub-tasks?

  Decomposition
• The 'if-else' structure executes a different set of instructions based on whether a condition is true or false.


  True
• When is a 'for loop' typically used in algorithms?

  Number of iterations is known
• Match the loop type with its description:

  for loop ↔️ Number of iterations is known

  while loop ↔️ Number of iterations is unknown
• An algorithm can be compared to a recipe for making toast
• An algorithm is a set of clear, ordered instructions
• Steps in decomposing a problem

  1️⃣ Identify the overall goal

  2️⃣ Break down the goal into sub-tasks

  3️⃣ Arrange sub-tasks in logical order

  4️⃣ Repeat breakdown for complex sub-tasks
• A sequence structure ensures steps are executed in sequential
• What are the most common selection structures in algorithm design?

  If and if-else
• What are iteration structures also known as in algorithm design?

  Loops
• Loops reduce code duplication and automate repetitive tasks.


  True
• A function has a unique identifier called its name
• What is one key aspect to comment in an algorithm?

  Purpose of the algorithm
• One benefit of commenting is improved readability
• Match the purpose of commenting with its corresponding benefit:

  Purpose of the algorithm ↔️ Improved Readability

  Logic flow ↔️ Enhanced Maintainability

  Key variables and constants ↔️ Better Collaboration

  Assumptions and limitations ↔️ Knowledge Transfer