WarmUp: Algorithm, design, and problem solving

What is the purpose of decomposition in the program development life cycle?

• To make the problem more complex

• To solve smaller parts of a complex problem

• To confuse the programmer

• To slow down the development process

Answer explanation

Decomposition is used to solve smaller parts of a complex problem, making the program development process more manageable and efficient.

What is the purpose of the design stage in the program development life cycle?

• To collect information about the system.

• To make the program development process more difficult

• To specify how the program should be developed

• To skip important steps in the development process

Answer explanation

The purpose of the design stage is to specify how the program should be developed. It helps in planning and organizing the development process.

What is iterative testing in the program development life cycle?

• Using a WHILE loop

• Testing the program only once by many users

• Testing the program multiple times with different data

• Skipping the testing phase

Answer explanation

Iterative testing is the process of testing the program multiple times with different data. It helps identify and fix bugs and improve the program's functionality.

How can computer systems be divided for better understanding?

• They can be divided into random sections

• They can be divided quickly into unrelated parts to save time.

• They can be divided into sub-systems

• They cannot be divided

Answer explanation

Computer systems can be divided into sub-systems for better understanding. This allows for a more organized and structured approach to studying and analyzing the system's components.

What is the purpose of flowcharts in the design and construction of a solution to a problem?

• To communicate how the algorithm works as a visual diagram.

• To show each process in a simple English text.

• To complicate the solution

• To slow down the development process

Answer explanation

Flowcharts are used to communicate how the algorithm works, making it easier to understand and implement the solution. They provide a visual representation of the process, highlighting the correct choice.

What is the purpose of a CASE statement in pseudocode?

• To select a specific option.

• To display the day of the week

• To calculate the average of a list

• To check if a value is stored in a list

Answer explanation

The purpose of a CASE statement in pseudocode is to repeat existing methods.

What is the purpose of validation in computer systems?

• To sort a list of temperatures in ascending order

• To search for a specific value in a list

• To ensure that only reasonable data is accepted

• To check that data does not change as it is being entered

Answer explanation

Validation in computer systems is used to ensure that only reasonable data is accepted. It checks that the data meets certain criteria and highlights the correct choice.

What is the purpose of a linear search in algorithms?

• To display the day of the week

• To calculate the average of a list

• To repeat existing methods

• To check if a value is stored in a list

Answer explanation

The purpose of a linear search is to check if a value is stored in a list.

What is the purpose of a range check in validation?

• To sort a list of temperatures in ascending order

• To search for a specific value in a list

• To check that the value of a number is within a specified range

• To ensure that data does not change as it is being entered

Answer explanation

The purpose of a range check in validation is to ensure that the value of a number is within a specified range. It helps to highlight the correct choice and is an important step in data validation.

What is the purpose of a bubble sort in algorithms?

• To calculate the average of a list

• To sort a list of items into a meaningful order

• To repeat existing methods

• To check if a value is stored in a list

Answer explanation

The purpose of a bubble sort is to sort a list of items into a meaningful order.