Free Test Scope and lifetime of ... – C Language

Q1: Which keyword is used to declare a static variable in C?

A. static B. auto C. register D. extern

Q2: What is the default initial value of an uninitialized static variable in C?

A. garbage value B. 0 C. 1 D. NULL

Q3: Where is the memory for static variables allocated?

A. Heap B. Stack C. Data segment D. Register

Q4: What is the lifetime of a static variable in C?

A. Only inside a function call B. Until the block ends C. Until the program terminates D. Only inside main()

Q5: Can a static local variable be accessed outside its function?

A. Yes B. No C. Only in main() D. Only using pointers

Q6: What happens to the value of a static variable between function calls?

A. It is lost B. It is reset to zero C. It retains its value D. It becomes undefined

Q7: What is the default storage class of global variables in C?

A. static B. auto C. extern D. register

Q8: When a global variable is declared as static, its scope is limited to?

A. The entire program B. The file in which it is declared C. The function in which it is declared D. The block in which it is declared

Q9: What is the difference between static and global variables?

A. Static variables are faster B. Static variables have restricted scope C. Global variables are always constant D. Static variables are stored in heap

Q10: Which of the following variables is initialized only once in C?

A. auto B. static C. register D. extern

Q11: Can we initialize a static variable inside a loop?

A. Yes, and it is reinitialized every time B. Yes, but only once C. No D. Only using malloc

Q12: What is the storage duration of a static variable?

A. Automatic B. Static C. Thread D. Dynamic

Q13: Which keyword should be used for a variable that should retain its value between function calls?

A. extern B. static C. register D. auto

Q14: When is a static variable destroyed?

A. After the function exits B. After the block ends C. When the program ends D. When memory is freed

Q15: Can a static variable be declared inside a structure in C?

A. Yes B. No C. Only for arrays D. Only for unions

Q16: What is the initial value of a static array if partially initialized?

A. Remaining elements are garbage B. Remaining elements are zero C. Remaining elements are undefined D. Remaining elements are NULL

Q17: How many times is the initialization of a static variable executed?

A. Once per function call B. Only once C. Twice D. Depends on scope

Q18: What is the effect of declaring a static variable inside a function?

A. It has local scope and retains value between calls B. It has global scope C. It is stored on the stack D. It is destroyed after each call

Q19: Can a static variable be modified after initialization?

A. Yes B. No C. Only in main() D. Only by pointer

Q20: Where is a static local variable stored in memory?

A. Stack B. Heap C. Data segment D. Code segment

Quiz for Scope and lifetime of variables static