Quiz  /  C Programming MCQ Questions and Answers

  • 1. 
    C programs are converted into machine language with the help of

  • An Editor
  • A compiler
  • An operating system
  • None of the above

  • 2. 
    What will be the output of the following arithmetic expression ? 5+3*2%10-8*6

  • -37
  • -42
  • -32
  • -28

  • 3. 
    What will be the output of the following statement ? int a=10; printf(“%d &i”,a,10);

  • error
  • 10
  • 10 10
  • none of these

  • 4. 
    What will be the output of the following statement ? printf(“%X%x%ci%x”,11,10,’s’,12);

  • error
  • basc
  • Bas94c
  • none of these

  • 5. 
    What will be the output of the following statements ? int a = 4, b = 7,c; c = a = = b; printf(“%i”,C.;

  • 0
  • error
  • 1
  • garbage value

  • 6. 
    What will be the output of the following statements ? int a = 5, b = 2, c = 10, i = a>b void main() { printf(“hello”); main(); }

  • 1
  • 2
  • infinite number of times
  • none of these

  • 7. 
    What will be output if you will compile and execute the following c code? struct marks{ int p:3; int c:3; int m:2; }; void main(){ struct marks s={2,-6,5}; printf(“%d %d %d”,s.p,s.c,s.m); }

  • 2 -6 5
  • 2 -6 1
  • 2 2 1
  • Compiler error
  • None of these

  • 8. 
    What will be the output of the following statements ? int x[4] = {1,2,3}; printf(“%d %d %D”,x[3],x[2],x[1]);

  • 03%D
  • 000
  • 032
  • 321

  • 9. 
    What will be the output of the following statement ? printf( 3 + “goodbye”);

  • goodbye
  • odbye
  • bye
  • dbye

  • 10. 
    What will be the output of the following statements ? long int a = scanf(“%ld%ld”,&a,&A.; printf(“%ld”,A.;

  • error
  • garbage value
  • 0
  • 2

  • 11. 
    What will be the output of the following program ? #include void main() { int a = 2; switchA. { case 1: printf(“goodbye”); break; case 2: continue; case 3: printf(“bye”); } }

  • error
  • goodbye
  • bye
  • byegoodbye

  • 12. 
    What will be the output of the following statements ? int i = 1,j; j=i— -2; printf(“%d”,j);

  • error
  • 2
  • 3
  • -3

  • 13. 
    What will be the output of following program ? #include main() { int x,y = 10; x = y * NULL; printf(“%d”,x); }

  • error
  • 0
  • 10
  • garbage value

  • 14. 
    What will be the output of following statements ? char x[ ] = “hello hi”; printf(“%d%d”,sizeof(*x),sizeof(x));

  • 88
  • 18
  • 29
  • 19

  • 15. 
    What will be the output of the following statements ? int a=5,b=6,c=9,d; d=(ac?1:2):(c>b?6:8)); printf(“%d”,D.;

  • 1
  • 2
  • 6
  • Error

  • 16. 
    What will be the output of the following statements ? int i = 3; printf(“%d%d”,i,i++);

  • 34
  • 43
  • 44
  • 33

  • 17. 
    What will be the output of the following program ? #include void main() { int a = 36, b = 9; printf(“%d”,a>>a/b-2); }

  • 9
  • 7
  • 5
  • none of these

  • 18. 
    int testarray[3][2][2] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}; What value does testarray[2][1][0] in the sample code above contain?

  • 11
  • 7
  • 5
  • 9

  • 19. 
    void main() { int a=10,b=20; char x=1,y=0; if(a,b,x,y) { printf(“EXAM”); } } What is the output?

  • XAM is printed
  • exam is printed
  • Compiler Error
  • Nothing is printed

  • 20. 
    What is the output of the following code? #include void main() { int s=0; while(s++<10)> # define a 10 main() { printf(“%d..”,A.; foo(); printf(“%d”,A.; } void foo() { #undef a #define a 50 }

  • 10..10
  • 10..50
  • Error
  • 0

  • 21. 
    main() { struct { int i; }xyz; (*xyz)->i=10; printf(“%d”,xyz.i); } What is the output of this program?

  • program will not compile
  • 10
  • god only knows
  • address of I

  • 22. 
    What will happen if in a C program you assign a value to an array element whose subscript exceeds the size of array?

  • The element will be set to 0.
  • The compiler would report an error.
  • The program may crash if some important data gets overwritten.
  • The array size would appropriately grow.

  • 23. 
    What would be the output of the following program? include ain() har str[]=”S\065AB”; rintf(“n%d”, sizeof(str));

  • 7
  • 6
  • 5
  • error

  • 24. 
    What will be the value of `a` after the following code is executed define square(x) x*x = square(2+3)

  • 25
  • 13
  • 11
  • 10

  • 25. 
    long factorial (long x) ??? eturn x * factorial(x – 1); ith what do you replace the ???? to make the function shown above return the correct answer?

  • if (x == 0) return 0;
  • return 1;
  • if (x >= 2) return 2;
  • if (x <= 1) return 1;

  • 26. 
    int y[4] = {6, 7, 8, 9}; nt *ptr = y + 2; printf(“%dn”, ptr[ 1 ] ); hat is printed when the sample code above is executed?

  • 6
  • 7
  • 8
  • 9

  • 27. 
    e 8: += 5; reak; rintf(“i = %dn”, i); hat will the output of the sample code above be?

  • i = 5
  • i = 8
  • i = 9
  • i = 10

  • 28. 
    What will be output if you will compile and execute the following c code? oid main() f(printf(“cquestionbank”)) rintf(“I know c”); lse rintf(“I know c++”);

  • I know c
  • I know c++
  • cquestionbankI know c
  • cquestionbankI know c++
  • Compiler error

  • 29. 
    What will be output if you will compile and execute the following c code? define call(x) #x oid main(){ rintf(“%s”,call(c/c++));

  • ++
  • c/c++
  • /c++
  • Compiler error

  • 30. 
    What will be output if you will compile and execute the following c code? define message “union is ower of c” oid main() lrscr(); rintf(“%s”,message); etch();

  • union is power of c
  • union is power of c
  • union is Power of c
  • Compiler error
  • None of these

  • 31. 
    What will be output if you will compile and execute the following c code? oid main(){ nt a=25; lrscr(); rintf(“%o %x”,a,A.; etch();

  • 25 25
  • 025 0x25
  • 12 42
  • 31 19
  • None of these

  • 32. 
    What will be output if you will compile and execute the following c code? oid main() nt i=0; f(i==0){ =((5,(i=3)),i=1); rintf(“%d”,i); lse rintf(“equal”);

  • 5
  • 3
  • 1
  • equal
  • None of above

  • 33. 
    What will be output if you will compile and execute the following c code? nt extern x; oid main() rintf(“%d”,x); =2; etch(); nt x=23;

  • 0
  • 2
  • 23
  • Compiler error
  • None of these

  • 34. 
    What will be output if you will compile and execute the following c code? oid main(){ nt a,b; =1,3,15; =(2,4,6); lrscr(); rintf(“%d “,a+B.; etch();

  • 3
  • 21
  • 17
  • 7
  • Compiler error

  • 35. 
    What will be output if you will compile and execute the following c code? oid main(){ tatic main; nt x; =call(main); lrscr(); rintf(“%d “,x); etch(); nt call(int address){ ddress++; eturn address;

  • 0
  • 1
  • Garbage value
  • Compiler error
  • None of these

  • 36. 
    What will be output if you will compile and execute the following c code? define message “union is ower of c” oid main(){ lrscr(); rintf(“%s”,message); etch(); Power of c

  • union is power of c
  • union ispower of c
  • union is
  • Compiler error
  • None of these

  • 37. 
    What will be output if you will compile and execute the following c code? oid main(){ nt i=0; f(i==0){ =((5,(i=3)),i=1); rintf(“%d”,i); lse rintf(“equal”);

  • 5
  • 3
  • 1
  • equal
  • None of above

  • 38. 
    What will be output if you will compile and execute the following c code? include “string.h” oid main(){ lrscr(); rintf(“%d %d”,sizeof(“string”),strlen(“string”)); etch();

  • 6 6
  • 7 7
  • 6 7
  • 7 6
  • None of these

  • 39. 
    What will be output if you will compile and execute the following c code? oid main(){ nt huge*p=(int huge*)0XC0563331; nt huge*q=(int huge*)0xC2551341; p=200; rintf(“%d”,*q);

  • arbage value
  • ull
  • 200
  • Compiler error

  • 40. 
    What will be output if you will compile and execute the following c code? truct marks{ nt p:3; nt c:3; nt m:2; ; oid main(){ truct marks s={2,-6,5}; rintf(“%d %d %d”,s.p,s.c,s.m);

  • 2 -6 5
  • 2 -6 1
  • 2 2 1
  • Compiler error
  • None of these

  • 41. 
    What will be output if you will compile and execute the following c code? oid main(){ f(printf(“cquestionbank”)) rintf(“I know c”); lse rintf(“I know c++”);

  • I know c
  • I know c++
  • cquestionbankI know c
  • cquestionbankI know c++
  • Compiler error

  • 42. 
    What will be output if you will compile and execute the following c code? oid main(){ nt i=0; f(i==0){ =((5,(i=3)),i=1); rintf(“%d”,i); lse rintf(“equal”); . 5

  • 3
  • 1
  • equal
  • None of above

  • 43. 
    Who is father of C Language?

  • Bjarne Stroustrup
  • Dennis Ritchie
  • James A. Gosling
  • Dr. E.F. Codd

  • 44. 
    C Language developed at _____?

  • AT & T’s Bell Laboratories of USA in 1972
  • AT & T’s Bell Laboratories of USA in 1970
  • Sun Microsystems in 1973
  • Cambridge University in 1972

  • 45. 
    For 16-bit compiler allowable range for integer constants is ______ ?

  • -3.4e38 to 3.4e38
  • -32767 to 32768
  • -32768 to 32767
  • -32668 to 32667

  • 46. 
    A C variable cannot start with

  • An alphabet
  • A number
  • A special symbol other than underscore
  • both B. and C.

  • 47. 
    Which of the following is allowed in a C Arithmetic instruction

  • []
  • {}
  • ()
  • None of the above

  • 48. 
    Which of the following shows the correct hierarchy of arithmetic operations in C

  • / + * –
  • * – / +
  • + – / *
  • * / + –

  • 49. 
    What is an array?

  • An array is a collection of variables that are of the dissimilar data type.
  • An array is a collection of variables that are of the same data type.
  • An array is not a collection of variables that are of the same data type.
  • None of the above.

  • 50. 
    What is right way to Initialization array?

  • int num[6] = { 2, 4, 12, 5, 45, 5 } ;
  • int n{} = { 2, 4, 12, 5, 45, 5 } ;
  • int n{6} = { 2, 4, 12 } ;
  • int n(6) = { 2, 4, 12, 5, 45, 5 } ;

  • 51. 
    An array elements are always stored in _________ memory locations.

  • Sequential
  • Random
  • Sequential and Random
  • None of the above

  • 52. 
    What is the right way to access value of structure variable book{ price, page }?

  • printf(“%d%d”, book.price, book.page);
  • printf(“%d%d”, price.book, page.book);
  • printf(“%d%d”, price::book, page::book);
  • printf(“%d%d”, price->book, page->book);

  • 53. 
    perror( ) function used to ?

  • Work same as printf()
  • prints the error message specified by the compiler
  • prints the garbage value assigned by the compiler
  • None of the above

  • 54. 
    Bitwise operators can operate upon?

  • double and chars
  • floats and doubles
  • ints and floats
  • ints and chars

  • 55. 
    What is C Tokens?

  • The smallest individual units of c program
  • The basic element recognized by the compiler
  • The largest individual units of program
  • A & B Both

  • 56. 
    What is Keywords?

  • Keywords have some predefine meanings and these meanings can be changed.
  • Keywords have some unknown meanings and these meanings cannot be changed.
  • Keywords have some predefine meanings and these meanings cannot be changed.
  • None of the above

  • 57. 
    What is constant?

  • Constants have fixed values that do not change during the execution of a program
  • Constants have fixed values that change during the execution of a program
  • Constants have unknown values that may be change during the execution of a program
  • None of the above

  • 58. 
    Which is the right way to declare constant in C?

  • int constant var =10;
  • int const var = 10;
  • const int var = 10;
  • B & C Both

  • 59. 
    Which operators are known as Ternary Operator?

  • ::, ?
  • ?, :
  • ?, ;;
  • None of the avobe

  • 60. 
    In switch statement, each case instance value must be _______?

  • Constant
  • Variable
  • Special Symbol
  • None of the avobe

  • 61. 
    What is the work of break keyword?

  • Halt execution of program
  • Restart execution of program
  • Exit from loop or switch statement
  • None of the avobe

  • 62. 
    What is function?

  • Function is a block of statements that perform some specific task.
  • Function is the fundamental modular unit. A function is usually designed to perform a specific task.
  • Function is a block of code that performs a specific task. It has a name and it is reusable
  • All the above

  • 63. 
    Which one of the following sentences is true ?

  • The body of a while loop is executed at least once.
  • The body of a do … while loop is executed at least once.
  • The body of a do … while loop is executed zero or more times.
  • A for loop can never be used in place of a while loop.

  • 64. 
    A binary tree with 27 nodes has _______ null branches.

  • 54
  • 27
  • 26
  • None of the above

  • 65. 
    Which one of the following is not a linear data structure?

  • Array
  • Binary Tree
  • Queue
  • Stack

  • 66. 
    Recursive functions are executed in a?

  • First In First Out Order
  • Load Balancing
  • Parallel Fashion
  • Last In First Out Order

  • 67. 
    Queue is a _____________ list.

  • LIFO
  • LILO
  • FILO
  • FIFO

  • 68. 
    The statement print f (“%d”, 10 ? 0 ? 5 : 1 : 12); will print?

  • 10
  • 0
  • 12
  • 1

  • 69. 
    To represent hierarchical relationship between elements, which data structure is suitable?

  • Priority
  • Tree
  • Dqueue
  • All of the above

  • 70. 
    Which of the following data structure is linear type?

  • Strings
  • Queue
  • Lists
  • All of the above

  • 71. 
    The statement printf(“%c”, 100); will print?

  • prints 100
  • print garbage
  • prints ASCII equivalent of 100
  • None of the above

  • 72. 
    The _______ memory allocation function modifies the previous allocated space.

  • calloc
  • free
  • malloc
  • realloc

  • 73. 
    Number of binary trees formed with 5 nodes are

  • 30
  • 36
  • 108
  • 42

  • 74. 
    The “C” language is

  • Context free language
  • Context sensitive language
  • Regular language
  • None of the above

  • 75. 
    The worst case time complexity of AVL tree is better in comparison to binary search tree for

  • Search and Insert Operations
  • Search and Delete Operations
  • Insert and Delete Operations
  • Search, Insert and Delete Operations

  • 76. 
    In which tree, for every node the height of its left subtree and right subtree differ almost by one?

  • Binary search tree
  • AVL tree
  • Threaded Binary Tree
  • Complete Binary Tree

  • 77. 
    The Default Parameter Passing Mechanism is called as

  • Call by Value
  • Call by Reference
  • Call by Address
  • Call by Name

  • 78. 
    What is Dequeue?

  • Elements can be added from front
  • Elements can be added to or removed from either the front or rear
  • Elements can be added from rear
  • None of the above

  • 79. 
    In which linked list last node address is null?

  • Doubly linked list
  • Circular list
  • Singly linked list
  • None of the above

  • 80. 
    . Which is the correct syntax to declare constant pointer?

  • int *const constPtr;
  • *int constant constPtr;
  • const int *constPtr;
  • A and C both
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