12 Questions
What is the purpose of the code segment in an .exe file?
To store the compiled code of the program
Where are variables with automatic storage class stored?
Stack section
What happens to the value of automatic variables once the control goes out of the block they're defined in?
They are lost and re-initialized when the block is re-entered
Which storage class is the default for variables declared without a specific storage class?
Automatic
Where do global and static variables get allocated memory?
Data section
What is the scope of automatic variables in C programming?
Confined to the function or block in which they are declared
What does the data type of a variable indicate?
The type of data that will be stored in the variable and the amount of memory allocated
What best describes the scope of a variable?
The part of a program that can access a variable
What determines if a variable has linkage?
The scope where the variable is declared
What does a variable with external linkage mean?
It can be used anywhere in a multi-file program
Which factor determines the storage duration or lifetime of a variable?
The duration up to which the variable exists
What is different for variables declared with each storage class?
The initial value
Study Notes
Storage Classes in C Programming
Code Segment in an .exe File
- The code segment in an .exe file contains the machine code instructions that are executed by the CPU.
Variables with Automatic Storage Class
- Variables with automatic storage class are stored on the stack.
- Automatic variables are those declared inside a block (e.g., function or loop) without any storage class specifier.
Automatic Variables
- Once the control goes out of the block, the value of automatic variables is lost.
- Automatic variables are initialized every time the control enters the block.
Default Storage Class
- The default storage class for variables declared without a specific storage class is automatic.
Global and Static Variables
- Global and static variables are allocated memory in the data segment.
Scope of Automatic Variables
- The scope of automatic variables is limited to the block they are defined in.
Data Type of a Variable
- The data type of a variable indicates the type of value it can hold and the operations that can be performed on it.
Scope of a Variable
- The scope of a variable refers to the region of the program where the variable can be accessed.
Linkage of a Variable
- A variable has linkage if it can be accessed from multiple source files.
- The presence of a variable with the same name in multiple files determines whether a variable has linkage.
External Linkage
- A variable with external linkage means it can be accessed from multiple source files.
Storage Duration of a Variable
- The storage duration or lifetime of a variable is determined by its storage class.
Storage Classes
- Different storage classes (automatic, static, external, and register) differ in terms of storage duration, scope, and linkage.
Test your knowledge on C programming variables, storage classes, scope, linkage, and lifetime. Understand how variables are defined, their visibility within a program, and the memory allocation related to different storage classes.
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