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CSE MCQs :: C-MCQs

C-MCQs - Typedef
C-MCQs - Data Types
C-MCQs - C Functions
C-MCQs - C Operators
C-MCQs - Basic Linux
C-MCQs - c-data-types
C-MCQs - File Access
C-MCQs - Pointers - C
C-MCQs - Constants - C
C-MCQs - Variable Names
C-MCQs - Preprocessor - C
C-MCQs - Declarations - C
C-MCQs - Storage Management
C-MCQs - Conditional Expressions
C-MCQs - Control Flow Statements
C-MCQs - Standard Input and Output
C-MCQs - Structures, Unions, Bit-fields
  1. The function ____ obtains block of memory dynamically.
    2. A.
    calloc
    B.
    malloc
    C.
    Both a & b
    D.
    free

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  2. void * malloc(size_t n) returns:
    3. A.
    Pointer to n bytes of uninitialized storage
    B.
    NULL if the request cannot be satisfied
    C.
    Nothing
    D.
    Both a & b are true

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  3. calloc() returns a storage that is initialized to.
    4. A.
    Zero
    B.
    Null
    C.
    Nothing
    D.
    One

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  4. In function free(p), p is a:
    5. A.
    int
    B.
    Pointer returned by malloc()
    C.
    Pointer returned by calloc()
    D.
    Both b & c

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  5. What is the output of this C code?

    void main()
    {
    char *p = calloc(100, 1);
    p = "welcome";
    printf("%s\n", p);
    }
    6. A.
    Segmentation fault
    B.
    garbage
    C.
    Error
    D.
    welcome

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  6. Memory allocation using malloc() is done in?
    7. A.
    Static area
    B.
    Stack area
    C.
    Heap area
    D.
    Both b & c

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  7. Why do we write (int *) before malloc?
         int *ip = (int *)malloc(sizeof(int));
    8. A.
    It is for the syntax correctness
    B.
    It is for the type-casting
    C.
    It is to inform malloc function about the data-type expected
    D.
    None of the mentioned

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  8. Which one is used during memory deallocation in C?
    9. A.
    remove(p);
    B.
    delete(p);
    C.
    free(p);
    D.
    terminate(p);

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  9. Which of the following will return a result most quickly for searching a given key?
    10. A.
    Unsorted Array
    B.
    Sorted Array
    C.
    Sorted linked list
    D.
    Binary Search Tree

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  10. On freeing a dynamic memory, if the pointer value is not modified, then the pointer points to?
    11. A.
    NULL
    B.
    Other dynamically allocated memory
    C.
    The same deallocated memory location
    D.
    It points back to location it was initialized with

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