Which of the following keyword supports dynamic method resolution?
abstract
Virtual
Dynamic
Typeid
Correct Answer :
A. abstract
Related Questions
The output of the following code is:
void main()
{
int z, a = 5, b = 3; z = a * 2 + 26 % 3;
printf("%d", z); }
{
int z, a = 5, b = 3; z = a * 2 + 26 % 3;
printf("%d", z); }
10
0
12
None of the above
All macro substitutions in a program are done before compilation of the program.
True
False
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<b) return(f(b, a));
if(b==0) return(a);
return (f(b, a % b));
}
void main()
{
int a = 12, b=154;
printf("%d", f(a, b));
}
int f(int a, int b)
{
if (a<b) return(f(b, a));
if(b==0) return(a);
return (f(b, a % b));
}
2
1
Compilation error
Runtime error
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);
p++ executes faster than p + 1.
True
False
The expression 'int j = 6 + 3 % -9;' evaluates to -1.
True
False
What will be output if you will compile and execute the following c code?
#include
int main(){
int i=320;
char *ptr=(char *)&i;
printf("%d",*ptr);
return 0;
}
int main(){
int i=320;
char *ptr=(char *)&i;
printf("%d",*ptr);
return 0;
}
1
64
320
Compiler Error
The function fopen() on failure returns---------------------.
0
NULL
1
none of the above
The output of the following code is:
void main()
{
float a;
int x = 10, y = 3; a = x / y;
printf("%f", a); }
{
float a;
int x = 10, y = 3; a = x / y;
printf("%f", a); }
3.999999
Error
3
3.000000
Which of the following keyword supports dynamic method resolution?
abstract
Virtual
Dynamic
Typeid
If the class name is X, what is the type of its “this” pointer (in a nonstatic, non-const member function)?
const X* const
X* const
X*
X&
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);
Which of the following expressions is wrong
float a =123.56;
char ch ='T' * 'A';
char ch ='T' *20;
3 +a = b;
The same variable names of automatic type can be used in different functions without any conflict.
True
False
What's wrong? (x = 4 && y = 5) ? (a = 5) ; (b = 6);
the question mark should be an equal sign
the first semicolon should be a colon
there are too many variables in the statement
the conditional operator is only used with apstrings
The main() function can be called from any other function.
True
False
static variable will not always have assigned value.
True
False
Only one break can be used in one loop.
True
False
C is a ___ language
High Level and Procedural
Low Level and OOPS
Middle Level and Procedural
Machine Level and OOPS
Identify the wrong statement
putchar(65)
putchar('x')
putchar("x")
putchar('
')
# define PI = 8;' is the correct declaration of macros.
True
False
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]);
}
}
{
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
Bitwise operators can operate upon?
double and chars
floats and doubles
ints and floats
ints and chars
The printf() function retunes which value when an error occurs?
Positive value
Zero
Negative value
None of these
strcat() function ----------------------- two strings.
delete
concatenate
compare
none of the above
Which header file is essential for using strcmp() function?
string.h
strings.h
text.h
strcmp.h
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));
}
main()
{
int a = 10, b = 5;
printf("%d, %d", sqr(a+b),sqr(++a));
}
77, 121
225, 121
77< 144
Compilation error
When a user defined function is defined in program, then it has to be called at least once from the main().
True
False
The identifier argv[] is a pointer to an array of strings.
True
False
If 'str' is a string of 7 characters, the statement printf("%4s", str); will display ------characters.
4
7
6
0