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# 1ST Semester - Academic Year: 2024-2025 ## VIII. Data Representation ### 11. What is the data type used to represent a single 16-bit Unicode character? * **Answer**: char ### 12. Identify the Java data type used to represent a 32-bit floating-point number. * **Answer**: float ### 13. What is...

# 1ST Semester - Academic Year: 2024-2025 ## VIII. Data Representation ### 11. What is the data type used to represent a single 16-bit Unicode character? * **Answer**: char ### 12. Identify the Java data type used to represent a 32-bit floating-point number. * **Answer**: float ### 13. What is the Java keyword used to represent a true/false value? * **Answer**: boolean ### 14. Name the Java class that is used to represent large integer values that exceed the range of primitive data types like *int* or *long*? * **Answer**: BigInteger ### 15. Identify the format used in Java to store and manipulate collections of characters. * **Answer**: String ### 16. What Java data type would you use to represent a 64-bit signed integer? * **Answer**: long ### 17. Name the Java class used to represent arbitrary-precision decimal numbers for high-precision calculations. * **Answer**: BigDecimal ### 18. In Java, what is the default character encoding format used for *char* and *String* types? * **Answer**: Unicode ### 19. Identify the Java data type used to store a sequence of bytes, commonly used for binary data representation. * **Answer**: byte[] ### 20. What Java data type is used to represent a 64-bit floating-point number for high-precision computations? * **Answer**: double ## IX. Goals of Data Representation ### 21. The primary goal of using this class in Java is to represent arbitrarily large integers that exceed the range of primitive types. * **Answer**: BigInteger ### 22. The main goal of using this data type in Java is to represent individual 16-bit Unicode characters. * **Answer**: char ### 23. The goal of using it in Java for data representation is to store and manipulate sequences of characters (text). * **Answer**: String ### 24. The primary objective of using it in Java is to perform high-precision arithmetic with decimal numbers, especially in financial applications. * **Answer**: BigDecimal ### 25. The goal of using this data type in Java is to represent true/false values for logical operations and conditions. * **Answer**: boolean ### 26. The purpose of using this data structure in Java for data representation is to represent and store binary data, such as files or network streams. * **Answer**: byte[] ### 27. Identify the goal of using this data type in Java is to represent whole numbers with a fixed range (64-bit for long). * **Answer**: long ### 28. The goal of data representation using this data type in Java is to represent floating-point numbers for scientific calculations with double precision. * **Answer**: double ### 29. The goal of this Java class when it comes to data representation is to provide utility methods for manipulating and inspecting individual characters, including support for Unicode. * **Answer**: Character ### 30. The main objective of using it in Java for data representation is to represent fixed-size collections of elements of the same data type with indexed access. * **Answer**: Array ## X. Memory Representation ### 31. Identify the memory area where Java objects are stored during runtime. * **Answer**: Heap ### 32. What is the name of the memory area in Java used for storing method calls, local variables, and function call execution details? * **Answer**: Stack ### 33. Identify the memory section where Java stores static variables and constants. * **Answer**: Method Area (also called the Permanent Generation in older versions of Java) ### 34. What is the Java memory model that ensures visibility and ordering of variables across multiple threads? * **Answer**: Java Memory Model (JMM) ### 35. Identify the process in Java that automatically reclaims memory allocated to objects that are no longer in use. * **Answer**: Garbage Collection ### 36. Name the region in memory where class metadata, such as class names, field types, and method information, is stored. * **Answer**: Method Area (or Metaspace in newer versions of Java) ### 37. Identify the type of memory representation where primitive data types such as *int*, *char*, and *boolean* are stored in Java. * **Answer**: Stack (for local variables), or Heap (if used as part of an object) ### 38. What is the Java memory area where strings created using string literals are stored? * **Answer**: String Pool (which is part of the Heap) ### 39. Identify the memory representation in Java where dynamic memory allocation occurs for object instances. * **Answer**: Heap ### 40. What is the term for the memory space that stores temporary data such as parameters, return addresses, and local variables in Java methods? * **Answer**: Stack Frame