C Objective Questions

No commas or blanks are allowed within an integer or a real constant.	True	False			A
'void' is a datatype.	True	False			A
'emp name' is a valid variable name.	True	False			B
'unsigned' is a valid variable name.	True	False			B
Operation between an integer and float always yields a float result.	True	False			A
/* The C language. /* is a procedural language .*/*/ The above statement is valid.	True	False			B
The default initial value of automatic storage class is 0.	True	False			B
= and = = have the same operation.	True	False			B
Character data types cannot be declared as unsigned.	True	False			B
&& and & operators have the same meaning.	True	False			B
Right shifting an operand 1bit is equivalent to multiplying it by 2.	True	False			B
The same variable names of automatic type can be used in different functions without any conflict.	True	False			A
printf("%d", sizeof('2')); will print 2.	True	False			B
The expression "b = 3 ^ 2;" will evaluate b = 9.	True	False			B
The expression "int i = j = k = 0;" is invalid.	True	False			A
printf() is not a library function.	True	False			B
The expression (i + j)++ is illegal.	True	False			A
The expression 'int j = 6 + 3 % -9;' evaluates to -1.	True	False			B
p++ executes faster than p + 1.	True	False			A
static variable will not always have assigned value.	True	False			A
Variables declared as register storage type gets stored in CPU registers.	True	False			A
Single operations involving entire arrays are permitted in C.	True	False			A
The main() function can be called from any other function.	True	False			A
The main() function can call itself recursively.	True	False			A
The statement "for (i = 0, j = 2; j <= 10; j++)" is a valid statement in 'C'.	True	False			A
When a user defined function is defined in program, then it has to be called at least once from the main().	True	False			B
Left shift operator rotates the bits on the left and places them to the right.	True	False			B
A recursive function calls itself again and again.	True	False			A
Only one break can be used in one loop.	True	False			B
Every if statement can be converted into an equivalent switch statement.	True	False			B
Nested macros are allowed.	True	False			B
Expression 4**3 evaluates to 64.	True	False			B
All macro substitutions in a program are done before compilation of the program.	True	False			A
'# define PI = 8;' is the correct declaration of macros.	True	False			B
An array declared as A[100][100] can hold a maximum of 100 elements.	True	False			B
The array 'char name[10] can consist of a maximum of 9 characters.	True	False			A
It is necessary to initialize the array at the time of declaration.	True	False			B
the value *(&i) is same as printing the value of address of i.	True	False			B
A pointer is an indication of the variable to be accessed next.	True	False			B
The contents of a file opened in 'r+' mode cannot be changed.	True	False			B
Union is used to hold different data at different time.	True	False			A
All elements of a structure are allocated contiguous memory locations.	True	False			A
enum helps to create user defined datatype.	True	False			A
The value of an enumerated datatype can be read using scanf() function.	True	False			B
Structures within structures cannot be created.	True	False			B
gets() and puts() are unformatted I/O functions.	True	False			A
The identifier argv[] is a pointer to an array of strings.	True	False			B
fprintf()function can be used to write into console.	True	False			B
fopen() function returns a pointer to the open file.	True	False			A
Which of the following language is predecessor to C Programming Language?	A	B	BCPL	C++	B
C programming language was developed by	Dennis Ritchie	Ken Thompson	Bill Gates	Peter Norton	A
C is a ___ language	High Level and Procedural	Low Level and OOPS	Middle Level and Procedural	Machine Level and OOPS	A
Which escape character can be used to beep from speaker in C?	\a	\b	\m	\n	A
Which of the following is invalid?	''	" "	'a'	'abc'	D
A declaration float a, b; occupies ___ of memory	1 byte	4 bytes	8 bytes	16 bytes	C
The printf() function retunes which value when an error occurs?	Positive value	Zero	Negative value	None of these	C
Identify the wrong statement	putchar(65)	putchar('x')	putchar("x")	putchar('\n')	C
Which header file is essential for using strcmp() function?	string.h	strings.h	text.h	strcmp.h	A
Which among the following is a unconditional control structure	do-while	if-else	goto	for	C
continue statement is used	to go to the next iteration in a loop	come out of a loop	exit and return to the main function	restarts iterations from beginning of loop	D
Which of the following is an example of compounded assignment statement?	a = 5	a += 5	a = b = c	a = b	C
In the expression - 'x + y + 3z =20'	'x + y' is a keyword	3 and 20 are constants	3z is a constant	y is a variable and z is a constant	B
The output of the following code is: void main() { int z, a = 5, b = 3; z = a * 2 + 26 % 3; printf("%d", z); }	10	0	12	None of the above	C
Which options shows the correct hierarchy of arithmetic operators	**, * or /, + or -	**, *, /, +, -	**, /, *, +,-	/ or *, - or +	D
The output of the following code is: void main() { float a; int x = 10, y = 3; a = x / y; printf("%f", a); }	3.999999	Error	3	3.000000	D
The output of the following code is: void main() { char a = 'B'; switch (a) { case 'A' : printf("a"); case 'B' : printf("b"); default : printf("c"); }	B	b	bca	bc	D
The output of the following code is: void main() { int a = 20; printf("%d\t%d\n", ++a, a); }	21 21	20 21	21 20	20 20	C
How many times the following loop will execute? for (a = 0; a < 4; a++) printf("hello\n");	3	4	5	infinite	B
The output of the following code is: void main() { int a; int &b = a; a=100; printf("b=%d\ta=%d\n", b,a); }	b=100 a=100	b=100 a=0	b=0 a=100	Error	D
The output of the following code is: void main() { int a = 0; while (a<=50) for(;;) if(++a % 50==0) break; printf("a = %d", a); }	a = 100	a = 50	compilation error	runtime error	A
The output of the following code is: int f(int a, int b); void main() { int a = 12, b=154; printf("%d", f(a, b)); } int f(int a, int b) { if (a if(b==0) return(a); return (f(b, a % b)); }	2	1	Compilation error	Runtime error	A
The output of the following code is: void main() { int a = 1, b=2; int *ip; ip=&a; b=*ip; printf("%d", b); }	2	1	100	0	B
The output of the following code is: void main() { static int a = 1, b, c; if (a>=2) b=2; c=3; printf("%d\t%d", b,c); }	2 3	0 3	0 0	2 0	B
The output of the following code is: #define sqr(x= x*x) main() { int a = 10, b = 5; printf("%d, %d", sqr(a+b),sqr(++a)); }	77, 121	225, 121	77, 144	Compilation error	D
struct stud { int roll; char name[20]; float marks; } *p; What will be the byte size of p?	24	2	26	None	B
The output of the following code is: main() { unsigned int a = 10; while (a>=10) { int a; a-- ; } printf("%i", a); }	Infinite loop	9	0	None	A
The output of the following code is: main() { xyz: goto abc; printf("Hello"); abc: printf("World"); goto xyz; }	Infinite loop	Hello World	World Hello	Compilation error	A
The output of the following code is: main() { int a = 0; for (; i = 0; i++) printf("%d", a); }	0	Nothing will be displayed	Infinite loop	None of the above	D
The output of the following code is: void change (char *k) { k="Hello"; return; } main() { char *ch = "World";; change(ch); printf("%s", ch); }	Hello	World	Compilation error	Hello World	B
Which of the following is not an infinite loop	int i =1; while (1) {i++;}	for( ; ; );	int true=0, false; while (true) {false = 1;}	int y, x = 0; do {y = x;} while (x==0);	C
do-while loop is useful when we want the statements within the loop must be executed	Only once	At least once	More than Once	Any one of the above	B
Which of the following is not a preprocessor directive	#if	#elseif	#undef	#pragma	B
The output of the following code is: main() { int a = 5, b = 6; (a == b? printf("%d", a)); }	0	5	Error	None of the above	C
The output of the following code is: main() { int k, num = 30; k = (num > 5 ? (num <= 10 ? 100 : 200) : 500); printf("\n%d", num); }	200	500	30	Unpredictable	C
The output of the following code is: main() { void msg() { printf("HELLO WORLD"); } }	HELLO WORLD	Error	None of the above		B
The output of the following code is: main() { int sub[50]; for(i=0; i<=48;i++) { sub[i]=i; printf("\n%d", sub[i]); } }	0 to 48 will be displayed	48	49	Compilation Error	D
The output of the following code is: main() { int a[10], i; for (i = 1; I <= 0; i++) { scanf("%d", a[i]); printf("%d", a[i]); } }	10	Logical error	Runtime error	1 to 10 will be displayed	B
Which of the following expressions is wrong	float a =123.56;	char ch ='T' * 'A';	char ch ='T' *20;	3 +a = b;	D
strcat() function ----------------------- two strings.	delete	concatenate	compare	none of the above	B
A function to be called must be ended with a----------------	.	?	;	none of the above	C
The function fopen() on failure returns---------------------.	0	NULL	1	none of the above	B
The-------------------- statement helps immediate exit from any part of the loop	break	continue	exit	All of the above	A
The -------------------------- loop executes at least once.	for	while	do-while	while & do-while	C
char *s[10] defines an array of ------------------------	pointers to strings	string to pointer	both		A
A multidimensional array A[10][9] can store-------- number of elements	91	88	90	89	C
The size of signed integer is ------ bytes.	4	2	8	10	B
There are total ------ numbers of operators in 'C'.	35	45	55	40	B
------ is the ternary operator	?,-	?,:	++,--	none of the above	B
unsigned char has a range from 0 to ------------	253	254	255	256	C
If 'str' is a string of 7 characters, the statement printf("%4s", str); will display ------characters.	4	7	6	0	A