ICDL Coding Principles (ICDL Foundation)

Which of the following best defines computational thinking?

• AThe process of writing syntax-error-free code in a specific programming language
• BA problem-solving methodology that involves formulating problems and their solutions in a…
• CThe physical hardware architecture design of computer processors
• DA method of searching the internet for pre-written code snippets to copy and paste

A developer is building a weather forecasting application and breaks the project down into three smaller tasks: retrieving temperature data, calculating averages, and formatting the output display. Which computational thinking technique is being used here?

• AAbstraction
• BPattern Recognition
• CDecomposition
• DAlgorithm Design

A software engineer notices that every time a user adds an item to an online shopping cart, the system must check the inventory, calculate the tax, and update the subtotal. Identifying this recurring sequence of steps is an example of which concept?

• APattern Recognition
• BAbstraction
• CDecomposition
• DTesting

When designing a GPS navigation app, the developer represents roads as simple lines and intersections as points, ignoring details like road texture, surrounding trees, or the color of buildings. Which computational thinking pillar is this?

• ADecomposition
• BPattern Recognition
• CAbstraction
• DSyntax Validation

Which of the following best describes an algorithm?

• AA high-level programming language that compiles directly into machine code
• BA physical storage device used to save application files
• CA set of step-by-step, unambiguous instructions designed to solve a specific problem or p…
• DAn automated tool used to compile and test code for syntax errors

In a standard programming flowchart, what shape is used to represent a decision point (e.g., checking if a variable is greater than 10)?

• ARectangle
• BParallelogram
• CDiamond
• DOval

Which flowchart shape should be used to represent the step 'Ask user to enter their age'?

• ARectangle
• BParallelogram
• CDiamond
• DOval

A flowchart contains the step 'Calculate total = price + tax'. Which shape is appropriate for this statement?

• ARectangle
• BParallelogram
• CDiamond
• DOval

What is the purpose of an oval shape (also called a terminator) in a system flowchart?

• ATo perform arithmetic calculations
• BTo check whether a condition is true or false
• CTo mark the beginning or end of the flowchart
• DTo display output information to the user

Which of the following best describes the main purpose of pseudocode?

• ATo run programs directly on a web browser for testing
• BTo write a program's logic in plain, structured language that is easy for humans to read…
• CTo compile and generate an executable binary file
• DTo automatically encrypt source code files for security purposes

A developer analyzing website traffic notices that users from Europe consistently click on a specific banner image between 7 PM and 9 PM local time. Identifying this behavior to optimize advertisement delivery is an application of which pillar?

• AAbstraction
• BDecomposition
• CPattern Recognition
• DTesting

A class diagram for a school administration system represents a student using only their ID, name, and enrolled courses, ignoring details like their height, favorite color, and home address. Which computational thinking pillar is this?

• AAbstraction
• BDecomposition
• CAlgorithm Design
• DPattern Recognition

You are asked to design a digital calculator. You decide to design the user interface, the mathematical engine (addition, subtraction), and the memory storage as separate, independent systems. This process is called:

• APattern Recognition
• BDecomposition
• CAbstraction
• DCoding Syntax

You want to swap the values of two variables: A and B. Which of the following algorithm sequences correctly swaps their values using a temporary variable 'temp'?

• Atemp = A; A = B; B = temp;
• BA = B; B = A;
• Ctemp = B; B = temp; A = B;
• Dtemp = A; B = temp; A = B;

Consider a flowchart loop that performs the following steps: 1. Set total = 0, set i = 1. 2. In a loop, check if i <= 5. 3. If true, calculate total = total + i and i = i + 2, then repeat. 4. If false, output total. What value is output at the end of the flowchart?

• A9
• B6
• C15
• D5

What is the primary difference between an algorithm and a computer program?

• AAn algorithm is a physical processor chip, while a program is the software stored in memo…
• BAn algorithm is a conceptual step-by-step design of a solution, while a program is the co…
• CAlgorithms are used only for mathematical calculations, while programs are used for gener…
• DPrograms are written by human developers, while algorithms are generated only by compilers

Which of the following best describes machine code?

• AA high-level programming language that reads like English statements
• BA sequence of instructions written in binary (0s and 1s) that a computer's central proces…
• CThe source code written in Python before it is translated or compiled
• DCode that is generated by web browsers to load web page styling rules

What is source code in computer programming?

• AThe electrical signals flowing through memory modules
• BThe human-readable programming statements written by a software developer in a programmin…
• CA database table containing search queries
• DThe compiled binary file ready for client download and execution

What is the primary function of a compiler in software development?

• ATo check user input forms for database security errors
• BTo translate high-level source code into low-level machine code that the computer's CPU c…
• CTo style the user interface buttons and apply color schemes
• DTo host application files on a remote cloud server

What is the main characteristic of a 'high-level' programming language?

• AIt is written in binary code and is highly efficient for CPU execution
• BIt is closer to human language and is more abstract, making it easier for developers to r…
• CIt can only execute on expensive server computers
• DIt is designed exclusively for programming hardware microchips

In a flowchart representing a loop construct, how is the loop condition depicted?

• ABy an input parallelogram that collects a loop counter from the user
• BBy a decision diamond that routes back to an earlier step if the loop condition is still…
• CBy a start oval that initializes loop variables to zero
• DBy a processing rectangle that increases the loop counter

Why is abstraction important when designing a complex software system?

• AIt allows developers to focus on the essential system features by hiding unnecessary impl…
• BIt makes the source code compile faster by deleting unused functions
• CIt ensures that the program is fully secure from external hacking attempts
• DIt allows a program to run without needing a CPU

A team of developers is designing a mobile game. They split the project into three parts: graphic asset design, game physics engine, and scoring logic. Why is this decomposition useful?

• AIt makes the game compile faster into binary files
• BIt allows team members to work on separate, manageable tasks in parallel, simplifying dev…
• CIt guarantees that the game will not have any syntax errors
• DIt automatically translates the game code into multiple human languages

Trace the following pseudocode algorithm: set fact = 1 set n = 4 while n > 1: fact = fact * n n = n - 1 What is the final value of fact?

• A24
• B12
• C120
• D6

Trace the following algorithm that finds the maximum value in a list of numbers [12, 45, 23]: set max = list[0] for each number in list: if number > max: max = number What is the final value of max after checking all numbers in the list?

• A12
• B23
• C45
• D80

What is the key characteristic of a variable in computer programming?

• AIts value remains fixed throughout the execution of the program
• BIt represents a physical location on the computer monitor
• CIts value can change or be updated during the program's execution
• DIt must always be named using numbers only

What is a constant in computer programming?

• AA variable that automatically changes its value every second
• BA named identifier whose assigned value cannot be altered during program execution
• CA type of loop that runs infinitely
• DA function that checks for syntax errors in code

Which of the following values is stored using an Integer data type?

• A12.5
• B"Hello World"
• C-42
• DTrue

Which data type is most appropriate for representing a measurement like 98.6?

• AInteger
• BBoolean
• CFloat (or Real)
• DString

What type of data is stored in a String data type?

• AOnly numerical values that can be added together
• BA sequence of characters, which can include letters, numbers, symbols, and spaces
• CA logic flag that is either True or False
• DA memory address pointing to a file

A variable named 'is_logged_in' is used to track whether a user has successfully signed into an application. What data type should this variable be?

• AFloat
• BBoolean
• CInteger
• DString

A developer is writing a program to calculate student grade point averages (GPA) such as 3.85 or 2.70. What is the most appropriate data type for the GPA variable?

• AInteger
• BFloat (or Real)
• CBoolean
• DString

A database needs to store customer phone numbers (e.g., "+353 1 2345678" or "0871234567"). Why is a String data type preferred over an Integer?

• AIntegers take up too much storage space compared to strings
• BPhone numbers contain characters like spaces and plus signs, and numeric operations like…
• COnly strings can be transmitted over internet databases
• DIntegers automatically encrypt the phone numbers, making them unreadable

Which of the following is a valid variable name in most standard programming languages?

• A2ndPlace
• Buser name
• Cuser_name
• Dtotal-cost

When a program executes an input command, such as taking a value typed by a user, where is that value stored so the program can use it later?

• AIn a compiler function
• BIn a variable
• CIn the output monitor
• DIn the source code text file

In a program, the variable name holds the string "Alice". If the program executes the command output("name"), what will be displayed?

• AAlice
• Bname
• CNothing, this causes a syntax error
• D"Alice"

What is the primary function of the assignment operator (written as '=' in most languages)?

• ATo check if two values are equal to each other
• BTo store the value on the right-hand side into the variable on the left-hand side
• CTo delete a variable from computer memory
• DTo declare a new function in code

Why is it considered a best practice to use named constants (like TAX_RATE = 0.23) instead of writing raw numbers directly in calculations?

• AIt makes the program compile and execute significantly faster
• BIt improves code readability and allows you to update the value in a single place if it c…
• CIt prevents users from hacking into the program
• DIt allows the variable to store multiple data types at the same time

A programmer performs a division in code: 5 / 2. If the language performs standard floating-point division, what is the result?

• A2
• B2.5
• C3
• D2 remainder 1

What is the purpose of the modulo operator (often written as '%') in programming?

• ATo calculate the percentage of a number
• BTo find the remainder after dividing one integer by another
• CTo divide a number and round it up to the nearest whole integer
• DTo raise a number to a specified power

Which of the following arithmetic operators is standardly used for multiplication in computer programming?

• Ax
• B*
• Cx or * interchangeable
• D^

Which set of values represents the only two possible states of a Boolean data type?

• A1 and -1
• BYes and No
• CTrue and False
• DOpen and Closed

If variable first = "John" and variable last = "Doe", what is the result of the expression first + " " + last?

• AJohnDoe
• BJohn Doe
• CA syntax error because you cannot add words
• D"first last"

What is the value of the following mathematical expression in a standard programming language: 10 + 5 * 2?

• A30
• B20
• C17
• D15

What is the value of the following mathematical expression in programming: (10 + 5) * 2?

• A20
• B30
• C17
• D25

Which of the following is the most appropriate variable name and data type for storing a customer's bank account balance?

• Abalance (Integer)
• BaccountBalance (Float)
• Cb (Boolean)
• DcustomerBalance$ (String)

A website registration form asks the user to check a box indicating they accept the Terms of Service. What data type should be used to store this status?

• AFloat
• BInteger
• CBoolean
• DString