Computational Thinking Concepts

This video tutorial covers essential topics for paper 2, including computational thinking, algorithm design, and programming fundamentals. It explains searching and sorting algorithms, advanced programming techniques like subprograms and file handling, and the importance of creating robust programs through testing and defensive design. The video also discusses Boolean logic and the differences between low-level and high-level programming languages.

What is the primary goal of decomposition in computational thinking?

• To execute instructions in a specific order

• To combine multiple problems into one

• To break down a problem into smaller sub-problems

• To hide unnecessary details

Which of the following best describes abstraction?

• Breaking down a problem into smaller sub-problems

• Executing instructions in a specific order

• Removing unnecessary details to focus on important ones

• Combining multiple problems into one

In a flowchart, what shape is typically used to represent a decision?

• Rectangle

• Triangle

• Circle

• Diamond

What is the main advantage of binary search over linear search?

• It does not require a sorted list

• It is more efficient for large datasets

• It checks every single item

• It works for any list

Which sorting algorithm involves comparing pairs of values and swapping them if they are in the wrong order?

• Merge Sort

• Insertion Sort

• Bubble Sort

• Quick Sort

What is a key characteristic of a 2D array?

• It can store multiple arrays

• It can only store integers

• It is always sorted

• It cannot be indexed

What is the purpose of a local variable in a subprogram?

• It cannot be changed once set

• It is accessible throughout the entire program

• It is used to store global constants

• It is only accessible within the subprogram it is defined in

Which of the following is NOT a feature of an Integrated Development Environment (IDE)?

• Code editor with auto-suggestion

• Manual code translation

• Error diagnostics tools

• Runtime environment

What is the main purpose of using subprograms in programming?

• To avoid using variables

• To increase the size of the program

• To make the code harder to read

• To break down complex problems into smaller parts

What does the SQL command 'SELECT * FROM students WHERE year IN (9, 10)' do?

• Selects all fields from the 'students' table where the year is 9 or 10

• Deletes all records from the 'students' table where the year is 9 or 10

• Inserts new records into the 'students' table with year 9 or 10

• Updates the 'students' table to set the year to 9 or 10