UGC-NET, GATE, C++ & Computer Science Test Preparation

Test Preparation on UGC-NET, GATE, C++ & Computer Science Test Preparation

1.

With every use of a memory allocation function, what function should be used to release allocated memory which is no longer needed?

1unalloc()
2dropmem()
3dealloc()
4free()

2.

void *ptr; myStruct myArray[10]; ptr = myArray; Which of the following is the correct way to increment the variable ptr"? "

1ptr = ptr + sizeof(myStruct);
2++(int*)ptr;
3ptr = ptr + sizeof(myArray);
4ptr = ptr + sizeof(ptr);

3.

Which of the following is the correct order of evaluation for the below expression?

z = x + y * z / 4 % 2 - 1

Which of the following is the correct order of evaluation for the below expression?
z = x + y * z / 4 % 2 - 1

A. * / % + - =

B. = * / % + -

C. / * % - + =

D. * % / - + =

1* / % + - =
2= * / % + -
3/ * % - + =
4* % / - + =

4.

int testarray[2][2][2] = {11, 22, 33, 44, 55, 66, 77, 88}; What value does testarray[1][1][0] in the sample code above contain?

155
277
388
411

5.

int a=10,b; b=a++ + ++a; printf(%d

1%d
2%d
3%d"
4b
5a++
6a

6.

When reallocating memory if any other pointers point into same piece of memory do these pointers-

1need to be readjusted
2they get readjusted automatically
3C does it on behalf of user
4none of above

7.

7. Which of these are correct method of declaring pointer? i. char p, ii. char p, iii. char * p, iv. char*p.

1I only
2I and II
3I, II and III
4all of above

8.

What is the output of this code main() { int c[ ]={2.8,3.4,4,6.7,5}; int j,p=c,q=c; for(j=0;j<5;j++) { printf( %d "

1*c); ++q; } for(j=0;j<5;j++) { printf(" %d "
2*p); ++p; } } "
32 2 2 2 2 2 3 4 6 5
42 2 2 2 2 3 4 6 5
52 2 2 2 3 4 6 5
62 2 2 2 3 4 6 5

9.

What will be the output of following code Int main(void) { int p =NULL; int c =(int*)malloc(sizeof(p)); printf( %0x" &c); return 0; } "

1Some address
2Blank Screen
3Some integer value
4Garbage value

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