Variables, Constants, Memory Cells, Identifiers, and Memory Addresses Quiz

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Questions and Answers

Which term refers to a data storage location whose value can vary and change during program execution?

  • Constant
  • Memory Cell (correct)
  • Identifier
  • Memory Address

What is the purpose of a constant in programming?

  • To uniquely identify variables
  • To point to specific memory locations
  • To store varying data during program execution
  • To represent fixed values that do not change during program execution (correct)

What does an identifier in programming refer to?

  • A type of memory cell
  • An address in the computer's memory
  • A name given to variables, functions, etc., in the code (correct)
  • A variable whose value remains constant

In programming, what does a memory address represent?

<p>A storage location for variables with varying values (C)</p>
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Why are variables essential in programming?

<p>To store changing data during program execution (D)</p>
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Which syntax is used when declaring a variable with an initial value in programming?

<p>data type variableName = value ; (B)</p>
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What does the number '4' represent in the given syntax?

<p>A placeholder for a value (B)</p>
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Which part of the syntax is missing to make it a valid variable declaration without an initial value?

<p>data type variableName ; (B)</p>
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What is the purpose of commas in the syntax 'data type vName1 , vName2 ,'?

<p>Indicate a list of variables with the same data type (C)</p>
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If a variable's initial value is not provided, what should be done to correctly declare it?

<p>End the declaration statement with only the data type (B)</p>
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What is the primary purpose of primitive data types in Java?

<p>To express the basic data stored in variables (A)</p>
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Which of the following is NOT considered a primitive data type in Java?

<p>String (D)</p>
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What is the range of values that can be stored in a 'byte' variable?

<p>-128 to 127 (D)</p>
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Which data type should be used in Java to store decimal numbers?

<p>float (B)</p>
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What is the size of a 'char' data type in Java?

<p>16 bits (C)</p>
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Which of the following is used to represent logical values in Java?

<p>'boolean' (B)</p>
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What is the largest value that can be stored in a 'short' variable?

<p>-32768 (A)</p>
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What happens if you try to store a number larger than the range of a particular data type?

<p>An error occurs and the program crashes (A)</p>
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'long' variables in Java are typically used to store:

<p>Whole numbers (B)</p>
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'boolean' data type in Java can only hold two values, which are:

<p>'true' and 'false' (A)</p>
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