1. main()
{ int arr[]={ 1,2,3,4 };
int *ptr ;;;;
ptr++ = arr;
printf("%d,%d",ptr[2],arr[2]);
return 0;
}
what is the output :
a. compile time error :multiple termination statements for pointer
b. lvalue required for ptr
c. prints 3 3
d. printd 4 3
Ans b: lvalue required for ptr;
2. main()
{
char s[10];
scanf ("%s",s);
printf(s);
}
what is the output if input is abcd :
a. prints abcd
b. compiler error
c. prints abcd and 6 junk characters
d. printd s
Ans a: prints abcd.
3. main()
{
char c = 255;
printf ("%d",c);
return 0;
}
what is the output
a. illegal character assignment
b. prints -1
c. prints 2
d. prints 255
Ans b: prints -1.
4. main()
{
int i;
for (i=7;i<=0;i--)
printf ("hello
");
}
what is the output
a. prints hello 7 times
b. prints hello 8 times
c. prints hello once
d. prints nothing
Ans b: prints nothing.
5. main()
{
printf( printf ("world") );
}
a. prints world
b. prints printf ("world")
c. prints nothing
d. compiler error
Ans d: compiler error.
Computer Concepts
1. A c source code file can be
a. compiled only
b. interpreted only
c. both compiled and interpreted
d. nothing
Ans c : both compiled and interpreted
2. c programming approach is
a. Top down
b. bottom up
c. both topdown and bottom up
d. none of the above
Ans a:top down approach
3. The access time is less for
a. hard disk
b. cache
c. registers
d. main memory
Ans c:registers
4.resolving of external variables in a program is done at
a.complie time
b.run time
c.link time
4.load time
Ans c: link time.
5. interrupts inform process about
a. events external to process asynchronously
b. events external to process synchronously
c. both a and b
d. events internal to a process
Ans a: events external to process asynchronously
C question and answers
1) #include
main()
{
scanf("%d");
printf();
}
which of the following is correct?
a)compilation error
b)Run time error
c)No output
d)depends on the compiler
Ans : a
2) #include
#define islower(c) ( a <=(c) && (c)<= z )
#define toupper(c) (islower(c)?(c)-( a - A ):(c))
main()
{
char *p="i am fine";
while(*p)
printf("%c",toupper(*p++));
}
a)bcd
b)AFE
c)aFe
d)BCd
Ans : b ( macro substitution 3 times)
3) #include
main()
{
200;
printf("tricky problem");
}
a)warning message
b)compilation error
c)run time error
d)none of these
Ans : a
4)which is the null statement?
a) ;
b) {}
c) ;
d)all of these
Ans : a
5)what is the correct prototype of printf function ?
a)printf(char *p,...);
b)printf(const *char *p,...);
c)printf(const char *p,...);
d)printf(const *char p,...);
Ans : c
Computer concepts
1)which of the following is not a system file?
a).sys
b).com
c).ini
d)none
Ans : d
2)A magnetic tape is equivalent to which of the following structure?
a)Graphs
b)trees
c)Lists
d)Dictionaries
Ans : c
3)For a linked list implementation which searching technique is not applicable?
a)linear search
b)none
c)quick sort
d)binary search
Ans : d
4)Encryption and decryption is done in which layer?
a)DLL
b)Network layer
c)transport layer
d)presentation layer
Ans : d
5)which of the following is not performed by the OS?
a)cpu shceduling
b)memory management
c)Transaction
d)none
Ans : c
