Programming Concepts: Variables, Constants, Arrays, Functions, and Objects. IT-FUNDAMENTALS-ITF-CERTIFICATION Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   Which of the following best describes the purpose of a variable in a program?

   • ATo provide a named storage location for a data value that can be updated.
   • BTo group related data items of the same type under a single name.
   • CTo hold a data value that remains fixed for the entire program run.
   • DTo define a set of instructions that can be called multiple times.
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2. 7application · medium

   A program uses the value 60 in several places to represent the number of seconds in a minute. The value will never change. What is the best practice for using this value?

   • ADefine a constant SECONDS_PER_MINUTE = 60 and use that constant in calculations.
   • BCreate a function that returns 60 each time it is called.
   • CDefine a variable secondsPerMinute = 60 and update it if needed.
   • DUse the literal number 60 directly in each calculation.
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4. 8application · easy

   A program tracks the number of visitors to a website. The count starts at 0 and increases by 1 each time a visitor arrives. Which code snippet correctly updates and displays the count?

   • Aconst visitors = 0 visitors = visitors + 1 print(visitors)
   • Bvisitors = 0 print(visitors) visitors = visitors + 1
   • Cvisitors = 0 visitors = visitors + 1 print(visitors)
   • Dvisitors = [0] visitors[0] = visitors[0] + 1 print(visitors[0])
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5. 9foundation · easy

   What is the primary purpose of a function in programming?

   • ATo define a value that remains fixed throughout the program.
   • BTo promote code reuse and modularity by encapsulating a set of actions.
   • CTo store a collection of data values of the same type.
   • DTo hold a single value that can be changed during execution.
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6. 10foundation · easy

   How do you typically access a specific element in an array?

   • ABy using its name and a numeric index, such as myArray[2].
   • BBy using a unique key string, such as myArray['name'].
   • CBy iterating through the array and comparing values to find the one you need.
   • DBy calling it as a function, such as myArray(2).
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