Cf chap3 engineering mcq's

7/28/2019 Cf chap3 engineering mcq's

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Unit 3 CF QB

1. Two dimensional arrays are also called

A tables arrays

B matrix arrays

C both of A & B

D none of above

Answer C

2. What is the output of the following code?# include# define a 10main(){

printf("%d..",a);foo();

printf("%d",a);}void foo(){

#undef a#define a 50

}

A 10..10

B 10/01/50

C Error

D 0

Answer A

3. The syntax of the array declaration is:

A datatype nameofarray [size];

B nameofarray [size];

C datatype nameofarray

D all of above

Answer A4. int j[4] the size of (j) and size of (int) will display the value

A 8,2

B 2.8

C 2,2


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D 1,1

Answer A

5. How many time the following function be called main( ){

int j;j=10;fun(j);

}fun(int j){

if(j!=5)fun(j-1);

}

A 10 times

B 5 timesC 6 times

D Infinite loop

Answer B

6. Which is the true statement about an array?

A To represent an array keyword array is used.

B Array elements can be accessed by the index placed within[].

C Array is a collection of similar type of elements.

D Both B & C.Answer D

7. Function name refers to

A Name given to variables.

B Name given to main function.

C Name given to function within main function.

D None of these.

Answer C

8. Which is the calling function?A largest(a,b);

B largest(int a, int b)

C largest(int, int);

D largest(*a, *b);

Answer A


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9. Which of the following is false about functions ?

A More that one function allowed in a program

B A function can call itself

C Constants can appear in the formal argument list

D A function can call another function

Answer C

10. What will be the output of the program?

#include

int fun(int i){

i++;return i;}

int main(){

int fun(int);int i=3;fun(i=fun(fun(i)));printf("%d\n", i);return 0;

}

A 5

B 4

C Error

D Garbage value

Answer A

11. Every executable C program must contain a

A printf function

B scanf, printf and main functions

C main function

D scanf function

Answer C

12. Two dimensional array elements are stored in

A System dependent.


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B In row major dependent.

C Compiler dependent

D In column major dependent.

Answer C

13. Array elements are stored in

A Sequential memory locations.

B scattered memory locations

C Direct memory locations.

D random memory locations

Answer A

14. Identify the incorrect declaration of arrays from the following

A int a[50];

B float values[10][20];

C double a[50];

D int score[10,15];

Answer D

15. Array is used to represent the following

A A list of data items of different data types.

B A list of data items of real data type.

C A list of data items of same data type.

D A list of data items of integer data type.Answer C

16. Arrays are passed to a function arguments by

A Value.

B Reference.

C Both value & reference

D None of the above.

Answer C

17. An array a[8] will store how many values ?A 8

B 7

C 9

D 0

Answer A

18. If an array is declared as a[10], then its elements will be stored as


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A a[1] to a[10].

B a[1] to a[9].

C a[0] to a[9].

D a[0] to a[10].

Answer C

19. Recursion always requires ?

A Termination of the algorithm

B Key variable

C Base value

D All of these

Answer D

20. In int k[4] the total memory occupied by the array is

A 32

B 8

C 4

D 2

Answer B

21. One dimensional array needs only subscript.

A one

B Two

C both of the first two

D none of the first two

Answer A

22. What will be the output of the program?#includeint main(){

int a[5] = {5, 1, 15, 20, 25};int i, j, m;i = ++a[1];j = a[1]++;m = a[i++];printf("%d, %d, %d", i, j, m);return 0;

}

A 2, 1, 15


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B 1, 2, 5

C 3, 2, 15

D 2, 3, 20

Answer C

23. What will be the output of the program?#includeint main(){

int arr[1]={10};printf("%d\n", arr[0]);return 0;

}

A 1

B 10

C 0

D 6

Answer B

24. What will be the output of the program ?#includeint main(){

float arr[] = {12.4, 2.3, 4.5, 6.7};printf("%d\n", sizeof(arr)/sizeof(arr[0]));return 0;

}A 5

B 4

C 6

D 7

Answer B

25. What will be the output of the program if the array begins 1200 in memory?#includeint main()

{int arr[]={2, 3, 4, 1, 6};printf("%u, %u, %u\n", arr, &arr[0], &arr);return 0;

}

A 1200, 1202, 1204

B 1200, 1200, 1200

C 1200, 1204, 1208


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D 1200, 1202, 1200

Answer B

26. Which of the following statements are correct about the program below?#includeint main(){

int size, i;scanf("%d", &size);int arr[size];for(i=1; i


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A Must contain at least one function.

B Need not contain any function.

C Needs input data.

D None of the above.

Answer A

30. int x[3]; the base address of x is 65460 the elements are stored at locations

A 65460, 65462, 65464

B 65460, 6546165462

C 65460, 65464, 65468

D 65460, 65460, 65460

Answer A

31. int cal_sum(int a, int b);In the above example int at the beginning indicates

A Name of the function.

B Return type of the function.

C Both function arguments are integer.

D None of the above options.

Answer B

32. Return is a statement used to

A Return control back to calling function.

B Return control & value back to calling fun

C Return void.

D Return value to the calling function.

Answer B

33. A ______________ function is one that returns no value.

A Float.

B Recursive.

C Void.

D Integer.

Answer C

34. int main(void){int i=1;while (i


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{ printf("%d",i);if (i>2)goto here;i++;}

}void fun(){here:

printf("C objective bits");}

Output of above program is

A 5 C objective bits

B 6

C C objective bits 7

D error

Answer D

35. Elements of two dimensional array are stored in ?

A Random order

B Column major order

C Row major order

D None of these

Answer C

36. In int x[10]; the number 10 specified in the square bracket represents the

A 10 addresses

B 10 values

C 10 lines

D None of the above

Answer B

37. Each array element stored in separate .

A memory Location

B pages

C directory

D None of the above

Answer A

38. Any function can be called from any other function. this statement is

A neither true nor false.


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B true.

C false.

D true some times.

Answer B

39. In a program, A function can be called

A only one time.

B only once.

C any number of times.

D only three times.

Answer C

40. when compared to call by value, the call by reference is ________ in execution

A fast.

B neither slow nor fast.C slow.

D equal.

Answer A

41. Actual and formal parameters must agree in

A names and data types.

B number of arguments and data types.

C names and number of arguments.

D data types.Answer B

42. void funct(void)The above function declaration indicates

A it returns nothing and no arguments.

B it returns nothing and had arguments.

C it returns a value and had arguments.

D it returns a value and no arguments.

Answer A43. If the number of actual arguments are not matching with formal arguments then

A no error.

B compiler error.

C logical error.

D Run time error

.Answer B


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44. It is necessary to declare the return type of a function in the calling program if thefunction

A Returns an integer

B Returns a non-integer value

C Is not defined in the same file

D None of these

Answer B

45. Use of functions

A helps to avoid repeating a set of statements many times

B enhances the logical clarity of the program

C helps to avoid repeated program across programs

D all of the above

Answer D

46. What will be the output of the program in Turbo C (under DOS)?#includeint main(){

int arr[5], i=0;while(i


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int main(){

printf("HELLO");main();return 0;

}

A Infinite timesB 32767 times

C 65535 times

D Till stack overflows

Answer D

49. If you dont initialize a static array, what will be element set to?

A 0

B An undefined value

C A floating point

D \0

Answer A

50. Which of the following statements are correct about the program?#includeint main(){

printf("%p\n", main());return 0;

}

A It prints garbage values infinitely

B Runs infinitely without printing anything

C Error: main() cannot be called inside printf()

D Compilation Error

Answer B

51. There is a error in the below program. Which statement will you add to remove it?

#include

int main(){

int a;a = f(10, 3.14);printf("%d\n", a);return 0;

}float f(int aa, float bb)


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{return ((float)aa + bb);

}

A Add prototype: float f(aa, bb)

B Add prototype: float f(int, float)

C Add prototype: float f(float, int)D Add prototype: float f(bb, aa)

Answer B

52. Which of the following statements are correct about the function?

long fun(int num){

int i;long f=1;for(i=1; i


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B Run time error

C No Error

D Compilation error

Answer C

56. What will be the output of the program if the array begins at 65472 and each integer occupies 2 bytes?#includeint main(){

int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 1, 7, 8, 9, 0};printf("%u, %u\n", a+1, &a+1);return 0;

}

A 65474, 65476

B 65480, 65496

C 65480, 65488

D 65474, 65488

Answer B

57. In C, if you pass an array as an argument to a function, what actually gets passed?

A Value of elements in array

B First element of the array

C Base address of the array

D Address of the last element of array

Answer C

58. Choose the correct statements

A Strictly speaking C supports 1-dimensional arrays only

B An array element may be an array by itself

C Array elements need not occupy contiguous memory locations

D Both (A) and (B)

Answer D


A an entire array can be passed as an argument to a function

B a part of an array can be passed as argument to a function

C any change done to an array that is passed as an argument to a function will be local to thefunction.

D Both (A) & (B)

Answer D


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A Array stores data of the same type

B Array can be a part of a structure

C Array of structure is allowed

D All of the above

Answer D

61. Choose the statement that best defines an array

A It is a collection of items that share a common name.

B It is a collection of items that share a common name and occupy consecutive memorylocation

C It is a collection of items of the same type and storage class that share a common nameand occupy consecutive memory locations.

D None of above.

Answer C62. C does no automatic array bound checking. This is

A TRUE

B FALSE

C C's asset

D None of the above

Answer A

63. Consider the array definition

int num [10] = {3, 3, 3};Pick the Correct answers

A num [9] is the last element of the array num

B The value of num [ 8] is 3

C The value of num [ 3 ] is 3

D None of the above

Answer A

64. The values within [ ] in array declaration is used to specify ?

A Size of array

B Largest subscript value

C both a and b

D None of these

Answer A

65. What will be the output of the following program?# include


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void display();int main(){ printf(Hello);display();return 0;

}

void display(){

printf(Welcome);main();}

A Hello Welcome

B Welcome Hello

C No output

D Both messages will get printed infinitely

Answer D

66. What will be output if you will compile and execute the following c code?#include

int main(void){int array[3]={5};int i;for(i=0;i


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Answer B

68. If an array is declared asint a[4] = {3, 0, 1, 2}, then values assigned to a[0] & a[4] will be ______

A 3, 2

B 0, 2

C 3, 0

D 0, 4

Answer C

69. The names of variables,functions,arrays are known as

A keywords

B identifiers

C names

D elements

Answer B

70. Array is a ... ?

A Linear data structure

B non linear data structure

C complex data structure

D none of these

Answer A

71. If an array is declared as " int a[10] " which of the following is wrong ?

A a[-1]

B a[0]

C a[10]

D ++a

Answer A

72. The parameters of the called function are called

A casual parameters.

B formal parameters.

C usual parameters.

D actual parameters.

Answer B

73. The names of actual parameters and formal parameters

A almost same.

B should be same.


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C always same.

D need not be same.

Answer D

74. Which is not a proper prototype?

A int funct(char x, char y);

B double funct(char x)

C void funct();

D char x();

Answer B

75. What is the return type of the function with prototype: "int func(char x, float v, double t);"

A char

B int

C float

D double

Answer B

76. Which of the following is a valid function call (assuming the function exists)?

A funct;

B funct x, y;

C funct();

D int funct();

Answer C

77. Which of the following is a complete function?

A int funct();

B int funct(int x); {}

C void funct(int) { printf( "Hello");

D void funct(x) { printf( "Hello"); }

Answer D

78. What is the index number of the last element of an array with 29 elements

A 29

B 28

C 0

D Programmer-defined

Answer B


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79. Which of the following is a two-dimensional array?

A array anarray[20][20];

B int anarray[20][20];

C int array[20, 20];

D char array[20];

Answer B

80. Which of the following correctly accesses the seventh element stored in foo, an array with100 elements?

A foo[6];

B foo[7];

C foo(7);

D foo;

Answer A

81. Which of the following gives the memory address of the first element in array foo, anarray with 100 elements?

A foo[0];

B foo;

C &foo;

D foo[1];

Answer B

82. Is there any difference in the following declarations?

int myfun(int arr[]);int myfun(arr[20]);

A Yes

B No

C

D

Answer B

83. Global variable are available to all functions. Does there exist a mechanism by way of which it available to some and not to others.

A Yes

B No

C

D

Answer B

84. If no_______statement appears in a function definition, control automatically returns to


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the calling function after the last statement of the called function is executed:

A Return

B Void

C main

D None of these

Answer A

85. Array passed as an argument to a function is interpreted as

A Address of the array

B Values of the first elements of the array.

C Address of the first elements of the array

D Number of element of the array

Answer C

86. Which is the false statement:

A An array of characters is called string.

B Array can be passed to function.

C Array is always reference type.

D None of these

Answer D

87. What will happen if in a C program you assign a value to an array element whosesubscript exceeds the size of array?

A The element will be set to 0.

B The compiler would report an error.

C The program may crash if some important data gets overwritten.

D The array size would appropriately grow.

Answer C

88. Maximum number of elements in the array declaration int a[5][8] is

A 28

B 32

C 40

D 35

Answer C

89. If the size of an array is less than the number of initialization then

A Extra values are beingIgnored

B Generates an error message

C Size of array is increased


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D Size is neglected when values are given

Answer B

90. What will be the outputfor (i = 0; i


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A Brackets( [ ])

B Parenthesis ( )

C Comma ( ,)

D None

Answer A

96. Array can be sorted by using:

A Bubble Sort

B Merge Sort

C Quick Sort

D All of above

Answer D

97. _________ is used to store more than one value at a time in a single variable

A Array

B Pointer

C Structure

D None

Answer A

98. The two dimensional array is called _____

A matrix

B inverse

C one-dimensionalD None

Answer A

99. The array elements have been stored and accessed _____

A Row wise

B Column wise

C diagonally

D A & B

Answer D100. What will happen if you assign values in few locations of an array?

A Rest of the elements will be set to 0

B Complier error message will be displayed

C Possible system will crash


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B 551849

C 125559

D 998554

Answer A

103. What is the output of the following program?

void main ()

{ int j[]={15,11,17,15,14,18};

int m[]={1,5,8,4,5,9};

int l[]={1,2,,1,5,9},k;

for(k=0;k

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