21. What is the output of the following 'C' program? main() { extern int a; printf("\n%d",a); } int a=20;

Undefined

20

Error

Garbage Value

22. What is the output of the following 'C' program? main { extern int i; i = 20; print("%d",size of (i)); }

2

8

Would vary compiler to cimpiler

Error

23. The C declaration int b [100]; reserves ____________ successive memory locations,each large enough to contain single integer.

200

10,000

100

10

24. If a is an unsigned integer variable whose value is hx6db7, what is the value of -a?

h llhhhhl

hxhhl

hx248

hx9248

25. In case of ordinary int variables

leftmost bit is reserved for sign

rightmost bit is reserved for sign

no bit is reserved for sign

none of these

26. The declarations typedef float hight [100]; height men, women;

define men and women as 100 element floating point arrays

define men and women as floating point variables

define height, men and women as floating point variables

are illegal

27. The statement # include < math.h> is written at the top of a program to indicate

beginning of the program

beginning of the program

that certain information about mathematical library functions are to be included at the begnning of the program

none of these

28. A static variable

cannot be initialized

is initialized once at the commencement of execution and cannot be changed at run time

retains its value throughout the file of the program

is same as an automatic variable but is placed at the head of a program

29. Consider the following statement #define hypotenuse (a, b) sqrt (a*a + b*b); The macro-call hypotenuse (a + 2, b + 3);

finds hypotenuse of triangle with sides a + 2 and b+3

finds square root of (a + 2)2 + (b + 3)2

is meaningless

finds square root of 3*a + 4*b + 5

30. The rule for implicit type conversion in 'C' is

int < unsigned < float < double

unsigned < int < float < double

int < unsigned < double < float

unsigned < int < double < float

31. The variables which can be accessed by all modules in a program, are called

local variables

internal variables

external variable

global variables

32. C programming language by itself provides

input facility

output facility

both input and output facilities

no input and output facilities

33. C programming language provides operations which deal directly with objects such as

strings and sets

lists and arrays

characters, integers, and floating point numbers

all of these

34. In C programming language, if the first and the second operands of operator + are of types int and float, respectively, the result will be of type

int

float

char

long int

35. The value of ab if ab & 0 x 3f equals 0 x 27 is

047

0 x 0 f

0 x f3

0 x 27

36. If the declaration unsigned c:5; is replaced by unsigned : 6; then

it results in a syntax error

it is meaningless

compiler will give a new name for the field

none of these

37. int i = 5; is a statement in a C program.

during execution, value of i may change but not its address

during execution both the address and value may change

repeated execution may result in different addresses for i

i may not have an associated address

38. The program fragment int i = 263 ; putchar (i) ; prints

263

ASCII equivalent of 263

rings the bell

garbage

39. Printing a character as an integer

results in the printing of a negative integer

always prints a positive integer

prints a value that is implementation dependent

none of these

40. Which of the following 'C' type is not a primitive data structure?

int

float

char

none of these