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</p> Signup and view all the answers

    Why are variables essential in programming?

    <p>To store changing data during program execution</p> Signup and view all the answers

    Which syntax is used when declaring a variable with an initial value in programming?

    <p>data type variableName = value ;</p> Signup and view all the answers

    What does the number '4' represent in the given syntax?

    <p>A placeholder for a value</p> Signup and view all the answers

    Which part of the syntax is missing to make it a valid variable declaration without an initial value?

    <p>data type variableName ;</p> Signup and view all the answers

    What is the purpose of commas in the syntax 'data type vName1 , vName2 ,'?

    <p>Indicate a list of variables with the same data type</p> Signup and view all the answers

    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</p> Signup and view all the answers

    What is the primary purpose of primitive data types in Java?

    <p>To express the basic data stored in variables</p> Signup and view all the answers

    Which of the following is NOT considered a primitive data type in Java?

    <p>String</p> Signup and view all the answers

    What is the range of values that can be stored in a 'byte' variable?

    <p>-128 to 127</p> Signup and view all the answers

    Which data type should be used in Java to store decimal numbers?

    <p>float</p> Signup and view all the answers

    What is the size of a 'char' data type in Java?

    <p>16 bits</p> Signup and view all the answers

    Which of the following is used to represent logical values in Java?

    <p>'boolean'</p> Signup and view all the answers

    What is the largest value that can be stored in a 'short' variable?

    <p>-32768</p> Signup and view all the answers

    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</p> Signup and view all the answers

    'long' variables in Java are typically used to store:

    <p>Whole numbers</p> Signup and view all the answers

    'boolean' data type in Java can only hold two values, which are:

    <p>'true' and 'false'</p> Signup and view all the answers

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