C Quiz

C MCQs

Quiz

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1. Which of the following is allowed in a C Arithmetic instruction
   1.   []
   2.   {}
   3.   ()
   4.   None
2. A C variable cannot start with
   1.   Alphabet
   2.   number
   3.   A special symbol other than underscore
   4.   B and D
3. C programs are converted into machine language with the help of
   1.   An Editor
   2.   A compiler
   3.   An operating system
   4.   None
4. . For 16-bit compiler allowable range for integer constants is ______
   1.   -3.4e38 to 3.4e38
   2.   -32767 to 32768
   3.   -32768 to 32767
   4.   -32668 to 32667
5. C Language developed at _____
   1.   AT & T's Bell Laboratories of USA in 1972
   2.   AT & T's Bell Laboratories of USA in 1970
   3.   Sun Microsystems in 1973
   4.   Cambridge University in 1972
6. Who is father of C Language?
   1.   Bjarne Stroustrup
   2.   Dennis Ritchie
   3.   James A. Gosling
   4.   Dr. E.F. Codd
7. #include "stdio.h"
   int main()
   {
   int a@ = 10;
   printf("%d", a@);
   return 0;
   }
   1.   10
   2.   @
   3.   10@
   4.   Error
8. Which one of the following is invalid macro in C programming?
   1.   #pragma
   2.   #error
   3.   #ifndef
   4.   #esleif
9. Is it possible to run program without main() function?
   1.   Yes
   2.   No
   3.   May Be
   4.   Sometimes
10. Which of the following shows the correct hierarchy of arithmetic operations in C
    1.   / + * -
    2.   * - / +
    3.   + - / *
    4.   * / + -
11. How many times CppBuzz.com is printed?
    int main()
    {
    int a = 0;
    while(a++);
    {
    printf("CppBuzz.com");
    }
    
    return 0;
    }
    1.   0
    2.   1
    3.   Infinite
    4.   Compilation Error
12. What is an array?
    1.   collection of variables that are of the same data type.
    2.   collection of variables that are of the dissimilar data type
    3.   array is not a collection of variables that are of the same data type.
    4.   None
13. What is right way to Initialization array?
    1.   int num[6] = { 2, 4, 12, 5, 45, 5 } ;
    2.   int n{} = { 2, 4, 12, 5, 45, 5 } ;
    3.   int n{6} = { 2, 4, 12 } ;
    4.   int n(6) = { 2, 4, 12, 5, 45, 5 } ;
14. An array elements are always stored in _________ memory locations
    1.   Sequential
    2.   Random
    3.   Sequential and Random
    4.   None
15. What is the right way to access value of structure variable book{ price, page }?
    1.   printf("%d%d", book.price, book.page);
    2.   printf("%d%d", price.book, page.book);
    3.   printf("%d%d", price::book, page::book);
    4.   printf("%d%d", price->book, page->book);
16. perror( ) function used to ?
    
    B.
    
    1.   Work same as printf()
    2.   prints the error message specified by the compiler
    3.   prints the garbage value assigned by the compiler
    4.   None
17. Bitwise operators can operate upon?
    1.   doubles and chars
    2.   The basic element recognized by the compiler
    3.   The largest individual units of program
    4.   A and B
18. What is C Tokens?
    1.   The smallest individual units of c program
    2.   The basic element recognized by the compiler
    3.   The largest individual units of program
    4.   A and B
19. What are Keywords?
    1.   Keywords have some predefine meanings and these meanings can be changed.
    2.   Keywords have some unknown meanings and these meanings cannot be changed.
    3.   Keywords have some predefine meanings and these meanings cannot be changed.
    4.   None
20. What are Constants?
    1.   Constants have fixed values that do not change during the execution of a program
    2.   Constants have unknown values that may be change during the execution of a program
    3.   Constants have fixed values that change during the execution of a program
    4.   None
21. Which is the right way to declare constant in C?
    1.   int constant var =10;
    2.   int const var = 10;
    3.   const int var = 10;
    4.   B and C
22. Which operators are known as Ternary Operator?
    
    1.   ::, ?
    2.   ?, :
    3.   ?, ;;
    4.   None
23. In switch statement, each case instance value must be _______?
    
    1.   Constant
    2.   Variable
    3.   Special Symbol
    4.   None
24. What is the work of break keyword?
    1.   Halt execution of program
    2.   Restart execution of program
    3.   Exit from loop or switch
    4.   None
25. What is function?
    1.   Function is the fundamental modular unit. A function is usually designed to perform a specific
       task.
    2.   Function is a block of statements that perform some specific task.
    3.   Function is a block of code that performs a specific task. It has a name and it is reusable.
    4.   All the above
26. Which one of the following sentences is true ?
    
    1.   The body of a while loop is executed at least once.
    2.   The body of a do ... while loop is executed at least once.
    3.   The body of a do ... while loop is executed zero or more times.
    4.   A for loop can never be used in place of a while loop
27. A binary tree with 27 nodes has _______ null branches
    1.   54
    2.   27
    3.   26
    4.   None
28. Which one of the following is not a linear data structure?
    
    1.   Stack
    2.   Queue
    3.   Binary Tree
    4.   Array
29. Recursive functions are executed in a?
    
    1.   Parallel Fashion
    2.   Load Balancing
    3.   LIFO
    4.   FIFO
30. Queue is a ___________ list.
    1.   LIFO
    2.   LILO
    3.   FIFO
    4.   FILO
31. Recursive functions are executed in a?
    
    1.   Load Balancing
    2.   LIFO
    3.   Parallel Fashion
    4.   FIFO
32. The statement print f ("%d", 10 ? 0 ? 5 : 1 : 12); will print?
    1.   10
    2.   0
    3.   12
    4.   1
33. To represent hierarchical relationship between elements, which data structure is suitable?
    1.   Tree
    2.   Priority
    3.   Deque
    4.   All of the above
34. Which of the following data structure is linear type?
    1.   Strings
    2.   Queue
    3.   Lists
    4.   All of the above
35. The statement printf("%c", 100); will print?
    1.   prints 100
    2.   print garbage
    3.   prints ASCII equivalent of 100
    4.   None
36. The _______ memory allocation function modifies the previous allocated space.
    
    1.   calloc
    2.   free
    3.   malloc
    4.   realloc
37. Number of binary trees formed with 5 nodes are
    1.   30
    2.   36
    3.   108
    4.   42
38. The "C" language is
    1.   Context free language
    2.   Context sensitive language
    3.   Regular language
    4.   None
39. The worst case time complexity of AVL tree is better in comparison to binary search tree for
    1.   Search and Insert Operations
    2.   Search and Delete Operations
    3.   Insert and Delete Operations
    4.   Search, Insert and Delete Operations
40. In which tree, for every node the height of its left subtree and right subtree differ almost by
    one?
    
    1.   Binary search tree
    2.   AVL tree
    3.   Threaded Binary Tree
    4.   Complete Binary Tree
41. C is ______ Language?
    1.   Low Level
    2.   High Level
    3.   Assembly Level
    4.   Machine Level
42. The Default Parameter Passing Mechanism is called as
    1.   Call by Value
    2.   Call by Reference
    3.   Call by Address
    4.   Call by Name
43. What is Dequeue?
    
    1.   Elements can be added from front
    2.   Elements can be added to or removed from either the front or rear
    3.   Elements can be added from rear
    4.   None
44. In which linked list last node address is null?
    
    1.   Doubly linked list
    2.   Circular list
    3.   Singly linked list
    4.   None
45. Which is the correct syntax to declare constant pointer?
    
    1.   int *const constPtr;
    2.   *int constant constPtr;
    3.   const int *constPtr;
    4.   A and C
46. What will be the output of the following arithmetic expression ?
    5+3*2%10-8*6
    1.   -37
    2.   -42
    3.   -32
    4.   -28
47. What will be the output of the following statement ?
    int a=10; printf("%d &i",a,10);
    1.   error
    2.   10
    3.   10 10
    4.   None
48. What will be the output of the following statement ?
    printf("%X%x%ci%x",11,10,'s',12);
    1.   error
    2.   basc
    3.   Bas94c
    4.   None
49. What will be the output of the following statements ?
    int a = 4, b = 7,c; c = a = = b; printf("%i",c);
    1.   0
    2.   error
    3.   1
    4.   garbage value
50. What will be output if you will compile and execute the following c code?
    void main(){
    int a=25;
    clrscr();
    printf("%o %x",a,a);
    getch();
    }
    1.   25 25
    2.   025 0x25
    3.   12 42
    4.   None

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