1. Which of the following statements will result in a compilation error?
Answers:
• int n=5, x;
x=n++;
• int n=5, x; x= ++n++;
• int n=5, x; x= (n+1)++;
• int n=5, x=6; x= (n+x)++;
• None of the
above
2. Read the following two declaration
statements.
1. #include <stdio.h>
2. #include "stdio.h"
Which of the following statements pertaining to
the above two statements are correct?
Answers:
• For statement 1, the
header file will be searched first in the local directory and then in the
standard system directories such as "/usr/include"
• For
statement 1, the header file will be searched in the standard system
directories such as "/usr/include"
• For
statement 2, the header file will be searched first in the local directory and
then in the standard system directories such as "/usr/include"
• For statement 2, the
header file will be searched in the standard system directories such as
"/usr/include"
• None of the above
3. Which of the following statements are correct
for the keyword register?
Answers:
• It is a
storage-class-specifier
• It guarantees that the
variable is kept in the CPU register for maximum speed
• It
requests that the variable be kept in the CPU register for maximum speed
• It
does not guarantee that the variable value is kept in CPU register for maximum
speed
4. Which is/are the type/s of memory allocation
that needs/need the programmer to take care of memory management?
Answers:
• Static memory
allocation
•
Dynamic memory allocation
• Automatic memory
allocation
• Memory
allocation on stack
• Memory allocation on
heap
5. Which of the following comparison statements
will be true if an integer is 16 bits and a long is 32 bits on a machine?
Answers:
• -1L < 1U
• -1L
> 1U
• -1L < 1UL
• -1L > 1UL
6. Which of the following is the correct way of
initializing a two-dimensional array?
Answers:
• char str[2][4]={
"abc", "def" };
• char str[2][4]={
{"abc"}, {"def"} };
• char
str[2][4]={ {'a','b','c','\0'}, {'d','e','f','\0'} };
• a and b
• a, b and c
7. Given the array:
int num[3][4]= {
{3,6,9,12},
{15,25,30,35},
{66,77,88,99}
};
what would be the output of *(*(num+1)+1)+1?
Answers:
• 3
• 15
• 26
• 66
• 77
8. Which function will you use to write a
formatted output to the file?
Answers:
• fputc()
• fputs()
•
fprintf()
• fseek()
• ftell()
9. Given the array:
int num[3][4]=
{
{3,6,9,12},
{15,25,30,35},
{66,77,88,99}
};
what would be the output of *(*(num+1))?
Answers:
• 3
• 15
• 66
• 6
• 25
10. What would be printed on the standard output
as a result of the following code snippet?
main()
{
char option = 5;
switch(option)
{
case '5':
printf("case : 1 \n");
break;
case 5:
printf("case : 2 \n");
break;
default:
printf("case : 3 \n");
break;
}
return 0;
}
Answers:
• case : 1
• case :
2
• case : 3
• Result in compilation
error
• None of the above
11. What would be printed on the standard output
as a result of the following code snippet?
main()
{
int i=5;
char
option = 5;
switch(option)
{
case '5':
printf("case : 1 \n");
break;
case i:
printf("case : 2 \n");
break;
default:
printf("case : 3 \n");
break;
}
return 0;
}
Answers:
• case : 1
• case : 2
• case : 3
• Result
in compilation error
• None of the above
12. What would be printed on the standard output
as a result of the following code snippet?
#define func(t, a, b) { t temp; temp=a; a=b;
b=temp; }
main()
{
int a=3, b=4;
float c=4.5, d = 5.99;
func(int, a, b);
func(float, c, d);
printf("%d %d ", a, b);
printf("%.2f %.2f\n", c, d);
}
Answers:
• Results in Compilation
Error
• 3 4 5.99 4.50
• 3 4 4.50 5.99
• 4 3
5.99 4.50
• None of the above
13. What would be printed on the standard output
as a result of the following code snippet?
main()
{
void addup (int b);
addup(b);
return 0;
}
int b = 5;
void addup (int b)
{
static int v1;
v1
= v1+b;
printf("%d ", v1);
}
Answers:
• Will
result in Compilation Error
• 5
• 0
• Undefined value
14. Given the following array declaration:
int
a[2][3][4];
what would be the number of elements in array a?
Answers:
• 24
• 22
• 20
• 12
• 36
15. Which file header is to be included for file
handling in a C program?
Answers:
• string.h
• file.h
•
stdio.h
• stdlib.h
• ctype.h
16. What is the return type of the following
function declaration?
func(char c);
Answers:
• void
• char
• int
•
undefined
17. What is the return value in case a file is
not opened successfully by using fopen()?
Answers:
• 0
• 1
• 100
• NULL
18. What is the function to concatenate two
strings?
Answers:
• strcmp()
• strcpy()
•
strcat()
• strlen()
• catstr()
19. Which of the following statements is valid
and correct?
Answers:
• char
amessage[] = "lmnop"; amessage++;
• char *pmessage =
"abcde"; (*pmessage)++;
• char amessage[] =
"lmnop"; (*amessage)++;
• char *pmessage =
"abcde"; pmessage++;
20. What will be the output of following code?
int main()
{
int
i;
i =
0;
for
(i = 1; i <2; i++)
{
i++;
printf( "%d", i );
continue;
printf( "%d", i );
}
return 0;
}
Answers:
• 22
• 2,2
• 2
• none of the above
21. Which of the following is not a valid mode
for opening a file?
Answers:
• r
• w
• a
• r+
• i
22. Given the following array:
char books[][40]={
"The Little World
of Don Camillo",
"To Kill a Mockingbird",
"My Family and
Other Animals",
"Birds, Beasts
and Relatives"
};
what would be the output of
printf("%c",books[2][5]);?
Answers:
• m
• M
• F
• i
• L
23. What would be printed on the standard output
as a result of the following code snippet?
char *str1 = "Hello World";
strcat(str1, '!');
printf("%s", str1);
Answers:
• Hello World!
• Hello World
• Hello
• The
code snippet will throw a compilation error
24. What will be printed on the standard output
as a result of the following code snippet?
void main()
{
char arr[] = {'R','A','M','\0'};
printf("%d",strlen(arr));
}
Answers:
• 0
• 1
• 3
• 4
• Cannot be determined
25. Given the following array:
int a[8] = {1,2,3,4,5,6,7,0};
what would be the output of
printf("%d",a[4]); ?
Answers:
• 3
• 4
• 5
• 6
• 7
26. In order to read structures/records from a
file, which function will you use?
Answers:
•
fscanf()
• fread()
• fgets()
• fgetc()
• fseek
27. An array is defined with the following
statement in a file, file1.c
int a[ ] = { 1, 2, 3, 4, 5, 6 };
In another file, file2.c, the following code
snippet is written to use the array a:
extern int a[];
int size = sizeof(a);
What is wrong with the above code snippet?
Answers:
• The size of the
operator cannot be applied to an array
• There is nothing wrong
with the code snippet. The value of the size will be 6
• There is nothing wrong
with the code snippet. The value of the size will be 7
• An
extern array of unspecified size is an incomplete type. The size of the
operator during compile time is unable to learn the size of an array that is
defined in another file
• None of the above
28. What would be printed on the standard output
as a result of the following code snippet?
main()
{
char *s="Hello World";
char s1[20], s2[20];
int len = sscanf(s,"%s",s1);
printf("%s : %d", s1, len);
}
Answers:
• Compilation Error
• Hello World : 11
• Hello World : 1
• Hello : 5
• Hello
: 1
29. Suppose there is a file a.dat which has to
be opened in the read mode using the FILE pointer ptr1, what will be the
correct syntax?
Answers:
• ptr1 =
open("a.dat");
• ptr1 =
fileopen("a.dat");
• ptr1 =
fopen("a.dat","r");
• ptr1 =
open("a.dat","r");
• ptr1 =
fileopen("a.dat","r");
30. Given the following array:
char books[][40]={
"The Little World
of Don Camillo",
"To Kill a
Mockingbird",
"My Family and
Other Animals",
"Birds, Beasts
and Relatives"
};
what would be the output of
printf("%s",books[3]);?
Answers:
• Birds
• B
• Birds,
Beasts and Relatives
• My Family and Other
Animals
• M
31. What would be printed on the standard output
as a result of the following code snippet?
void main()
{
unsigned char a=25;
a =
~a;
signed
char b = 25;
b =
~b;
printf("%d %d ", a, b);
}
Answers:
• 0 0
• 230 230
• 230
-26
• 230 -103
• None of the above
32. Which function will convert a string into a
double precision quantity?
Answers:
• atoi()
• atof()
• atol()
• atan()
• acos()
33. Which of the following is not a type of
operator ?
Answers:
• Rational
• Unary
•
Ternary
• Compound assignment
• Logical
34. The declaration int *(*p)[10] indicates:
Answers:
• p is an array of
pointers to functions the return type of which is an integer
• p is a pointer to a
function that returns a pointer to an integer
• p is a
pointer to an array of integer pointers
• p is a pointer to a
character string
35. What will be printed on the standard output
as a result of the following code snippet?
void main()
{
int num1 = 30, num2 = 4;
float result;
result = (float)(num1/num2);
printf("%.2f", result);
return 0;
}
Answers:
• 7
• 7.00
• 7.000000
• 7.5
• 7.50
36. What is the output of the following program
?
main()
{
int u = 1, v = 3;
printf("%d %d",u,v);
funct1(&u,&v);
printf(" %d %d\n",u,v);
}
void funct1(int *pu, int *pv)
{
*pu=0;
*pv=0;
return;
}
Answers:
• 1 3 1 3
• 1 3 1 1
• 1 3 0
0
• 1 1 1 1
• 3 1 3 1
37. Which of the following is/are the correct
signature/s of main with command line arguments?
Answers:
• int main(int argc,
char **argv)
• int
main(int argc, char *argv[])
• int main(int argc,
char *argv)
• int main(int argc,
char argv[])
• All of the above
38. From which of the following loop or
conditional constructs, is "break" used for an early exit?
Answers:
• switch
• for
• while
• do-while
• All of
the above
39. Given the operators:
1) *
2) /
3) %
What would be the order of precedence?
Answers:
• 1,2,3
• 1,3,2
• 3,2,1
• All have the same
precedence
• 1 and
2 have the same precedence, 3 is of lower precedence
40. Which of the following declarations of
structures is/are valid?
1)
struct node {
int count;
char *word;
struct node next;
}Node;
2)
struct node {
int count;
char *word;
struct node *next;
}Node;
3)
struct node {
int count;
char *word;
union u1 {
int n1;
float f1;
}U;
}Node;
Answers:
• 1,2,3
• 1,2
• 2,3
• 2
• None of the above
41. What would be printed on the standard output
as a result of the following code snippet?
main( )
{
char *str[ ] = {
"Manish"
"Kumar"
"Choudhary"
};
printf ( "\nstring1 = %s", str[0] );
printf ( "\nstring2 = %s", str[1] );
printf ( "\nstring3 = %s", str[2] );
}
Answers:
• string1 = Manish
string2 = Kumar string3 = Choudhary
• string1 = Manish
string2 = Manish string3 = Manish
•
string1 = ManishKumarChoudhary string2 = (null) string3 = (null)
• You will get an error
message from the compiler
42. What would be printed on the standard output
as a result of the following code snippet?
main()
{
int n=5, x;
x
= n++;
printf("%d ", x);
x
= ++n;
printf("%d ", x++);
printf("%d", x);
return 0;
}
Answers:
• 6 7 8
• 5 7 8
• 6 8 8
• 5 8 8
• None of the above
43. In which area of memory are static variables
allocated?
Answers:
• stack
• heap
• With the code binary
• None of the above
44. Which standard function is used to
deallocate memory allocated by the malloc() function?
Answers:
• free
• calloc
• delete
• release
• destroy
45. Read the statement below:
extern int a;
Which of the following statement/s pertaining to
the above statement is/are correct?
Answers:
• Declares an integer
variable a; Allocates storage for the variable
• Declares an integer
variable a; Does not allocate the storage for the variable
• Indicates that the
variable is defined outside the current file
• Brings
the scope of the variable defined outside the file to this file
• All of the above
• None of the above
46. The declaration int (*p[5])() means:
Answers:
• p is
an array of pointers to functions the return type of which is an integer
• p is a pointer to a
function that returns a pointer to an integer
• p is a pointer to an
array of integers
• p is a pointer to an
array of integer pointers
• p is a pointer to a
character string
47. What will be printed on the standard output
as a result of the following code snippet?
void main()
{
int arr[5]={1,2,3,4,5};
printf("%d\n", *(arr+4));
}
Answers:
• 1
• 2
• 4
• 5
• Cannot be determined
48. What would be printed on the standard output
as a result of the following code snippet?
main()
{
char *pmessage = "asdfgh";
*pmessage++;
printf("%s", pmessage);
return 0;
}
Answers:
• Will result in
Compilation Error
• Undefined string
• sdfgh
• asdfgh
49. Which function returns the current pointer
position within a file?
Answers:
•
ftell()
• fseek()
• fgetc()
• fread()
• fscanf()
50. Which of the following is not a relational
operator?
Answers:
• ==
• !=
•
<>
• >=
• <=
51. What does the argv[0] represent?
Answers:
• The first command line
parameter has been passed to the program
• The
program name
• The number of command
line arguments
• None of the above
52. What will happen when the following code is
executed?
void main()
{
char
arr1[] = "REGALINT";
char
arr2[10] = "REGALINT";
printf("%d,",sizeof(arr1));
printf("%d",sizeof(arr2));
}
Answers:
• 1,1
• 1,4
• 8,8
• 8,9
• 9,10
53. What will be the output of the following
program?
#include <assert.h>
main()
{
int n = 5;
assert(n > 3); //statement 1
n = n+2;
assert(n > 7);//statement 2
return 0;
}
Answers:
• Assertion 'n > 3'
failed; Program aborts at statement 1
•
Assertion 'n > 7' failed; Program aborts at statement 2
• Program returns 0 with
the value of n as 7
• Compilation Error
54. Which of the following is a function for
formatting data in memory?
Answers:
•
sprintf()
• printf()
• scanf()
• free()
• atol()
55. Which function allocates memory and
initializes elements to 0?
Answers:
• assign()
•
calloc()
• malloc()
• swab()
• allocate()
56. Is the following statement correct? If not,
why not? If yes, what is the size of the array?
int array[][3] = { {1,2}, {2,3}, {3,4,2} };
Answers:
• Yes,
the size is three columns by two rows
• Yes, the size is two
columns by two rows
• No, the first
dimension is omitted
• No, one of the three
initializer sets contains too many numbers
• Yes, the size is three
columns by three rows
57. Which of the following sets of conversion
statements may result in the loss of data?
Answers:
• int i; char c; i=c;
c=i;
• int i; char c; c=i;
i=c;
• int i;
float f; i=f; f=i;
• None of the above
58. Consider the following code.
int i = 4, *j, *k;
Which one of the following statements will
result in Compilation error?
Answers:
• j = &i;
• j = j + 4;
• j = j - 2;
• k = j + 3;
• j = j
* 2;
59. What would be printed on the standard output
as a result of the following code
snippet?
main()
{
enum {red, green, blue = 0, white};
printf("%d %d %d %d", red, green, blue, white);
return 0;
}
Answers:
• Will result in
Compilation Error
• 0 1 2 3
• 0 1 0
1
• 0 1 0 2
• Undefined
60. By which file function you can position the
file pointer in accordance with the current position?
Answers:
• ftell()
•
fseek()
• fgetc()
• fread()
• fscanf()
61. What is wrong with the following function
prototype statement?
int func();
Answers:
• The function
definition {...} is missing
• While
calling a function, the type int is not needed
• No parameter has been
passed
• The semicolon should
not be there
• There is nothing wrong
with the statement
62. What will be printed on the standard output
as a result of the following code snippet?
void main()
{
char arr[] = {'R','A','M'};
printf("%d",strlen(arr));
}
Answers:
• 0
• 1
• 3
• 4
• Cannot
be determined
63. What will be printed on the standard output
as a result of the following code snippet?
void main()
{
int arr[][2] = {1,2,3,4,5,6};
printf("%d",arr[2][1]);
}
Answers:
• 2
• 3
• 4
• 5
• 6
64. What would be printed on the standard output
as a result of the following code snippet?
#include<stdio.h>
main()
{
unsigned char a=255;
a
= a+1;
printf("%d",a);
return 0;
}
Answers:
• Undefined value
• 256
• 1
• 0
• -1
65. Which of the following is not a storage
type?
Answers:
• auto
• global
• static
• register
• extern
66. If a two dimensional array arr[4][10](an
array with 4 rows and 10 columns) is to be passed in a function, which of the
following would be the valid parameters in the function definition?
Answers:
• fn(int
arr[4][10])
• fn(int arr[][10])
• fn(int arr[4][])
• fn(int (*fn)[13])
• None of the above
67. Which function will you use to position the
file pointer at the beginning of the file?
Answers:
• rewind()
• fseek()
• fscanf()
• a or b
• b or c
68. Which of the following is not a string
function?
Answers:
• strlen()
• strcmp()
• strcpy()
•
strcomp()
69. What would be printed on the standard output
as a result of the following code snippet?
char i = 'A';
char *j;
j = & i;
*j = *j + 32;
printf("%c",i);
Answers:
• An error will occur
• a
• A
• b
• c
70. What will be printed on the standard output
as a result of the following code snippet?
void main()
{
char arr1[] = "REGALINT";
printf("%d,",strlen(arr1));
printf("%d",sizeof(arr1));
}
Answers:
• 1,1
• 8,4
• 8,8
• 8,9
• 9,8
71. What will be printed on the standard output
as a result of the following code snippet?
int funr(int x, int y)
{
if(x <= 0)
{
return y;
}
else
{
return (1+funr(x-1,y));
}
}
void main()
{
printf("%d",funr(2,3));
}
Answers:
• 2
• 3
• 5
• 6
• 9
72. Which header file are methods(or macros)
isalpha(), islower() a part of?
Answers:
• stdio.h
•
ctype.h
• string.h
• math.h
• None of the above
73. What would be printed on the standard output
as a result of the following code snippet?
#define Name Manish
main()
{
printf("My name""Name");
}
Answers:
• My name Manish
• My
nameName
• Results in Compilation
Error
• None of the above
74. What will be printed on the standard output
as a result of the following code snippet?
void main()
{
int
i,j,k;
i=4;
j=30;
k=0;
k=j++/i++;
++k;
printf("%d %d %d",i,j,k);
}
Answers:
• 5 31 8
• 5 31 7
• 5 31 6
• 4 30 7
75. What will be printed on the standard output
as a result of the following code snippet?
main()
{
int num = 425;
printf("%d",
printf("%d", num));
}
Answers:
• Will result in
Compilation Error
• 4425
• 4253
• 3435
• None of the above
76. What would be printed on the standard output
as a result of the following code snippet?
main()
{
signed char i = 1;
for (; i<=255; i++)
printf ("%d ",i);
return 0;
}
Answers:
• Compilation Error
• 1 2 3 ... 255
• 1 2 3 . . . 127
• 1 2 3
. . . 127 -128 -127 ... 0 1 2 3 . . . (infinite times)
77. What would be printed on the standard output
as a result of the following code snippet?
#define max(a, b) ((a) > (b)?(a):(b))
main()
{
int a=4;
float b=4.5;
printf("%.2f\n",max(a, b));
}
Answers:
• Results in Compilation
Error
• Undefined value
• 4.50
• 4.0
• None of the above
78. Which of the following is not a file related
function?
Answers:
• fgetc()
• puts()
• fputc()
• fscanf()
• fprintf()
79. What would be printed on the standard output
as a result of the following code snippet?
main()
{
enum {red, green, blue = 6, white};
printf("%d %d %d %d", red, green,
blue, white);
return 0;
}
Answers:
• 0 1 6 2
• 0 1 6
7
• Will result in
Compilation Error
• None of the above
80. What would be printed on the standard output
as a result of the following code snippet?
main()
{
int
a[5] = {1,4,5,6,9};
printf("%d\t", *a);
//Line 1
printf("%d", *++a);
//Line 2
return 0;
}
Answers:
• 1 4
• 0 1
• Undefined value
• Compilation Error in
"Line 1"
•
Compilation Error in "Line 2"
81. What would be printed on the standard output
as a result of the following code snippet?
#define max(a, b)((a) > (b)?(a):(b))
main()
{
int a=4, c = 5;
printf("%d ", max(a++, c++));
printf("%d %d\n", a,c);
}
Answers:
• Results in Compilation
Error
• 6 4 5
• 6 5 7
• 6 5 6
• None of the above
82. Which of the following file modes would mean
read + append?
Answers:
• w+
• a+
• r+
• r+a
• a+r
83. Which of the following standard functions is
used to close a file?
Answers:
• fileclose()
• closefile()
•
fclose()
• Any of the above
84. What would be printed on the standard output
as a result of the following code snippet?
int Recur(int num)
{
if(num==1 || num==0)
return 1;
if(num%2==0)
return Recur(num/2)+2;
else
return Recur(num-1)+3;
}
int main()
{
int a=9;
printf("%d\n",
Recur(a));
return 0;
}
Answers:
• 10
• 9
• 11
• 8
• None of the above
85. Identify the incorrect statement.
Answers:
• Records can be defined
in C by using structures
• Structure members can
be of the same/different data types
• Memory
is reserved when a structure label is defined
• A pointer to a
structure can be used to pass a structure to a function
• Arrays of structures
can be defined and initialized
86. What will happen when the following code is
executed?
{
int num;
num =0;
do {-- num;
printf("%d\n", num);
num++;
} while (num >=0);
}
Answers:
• The
loop will run infinitely
• The program will not
enter the loop
• There will be a
compilation error
• A runtime error will
be reported
87. Which of the following functions is used to
extract formatted input from a file?
Answers:
• fputc()
• fputs()
• fprintf()
•
fscanf()
• ftell()
88. What does the following function do?
int fn(unsigned int x)
{
int count = 0;
for(; x!=0; x&=(x-1))
count++;
return
count;
}
Answers:
• Returns the minimum
number of bits required to represent the number x
• Returns the number of
zero bits present in the number x
•
Returns the number of 1 bits(bits having one) in the number x
• Returns the square
root of the number
• None of the above
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