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Computer Science and Quiz Test for Preparation

11. The information about an array used in a program will be sorted in
A. Symbol table
B. Activation record
C. Both (a) and (b)
D. Dope vector

12. In which of the following cases, linked list implementation of sparse matrices consumes the same memory space as the conventional way of storing the entire array?
A. 5×6 matrix with 9 non-zero entries
B. 5×6 matrix with 10 non-zero entries
C. Efficient in accessing an entry
D. Efficient if the sparse matrix is a band matrix

Explanation:
Conventional way needs storage of m x n
In the case of linked list implementation of sparse matrices, storage needed will be(the number of non-zero entries).
Only in case(c), both the methods need the same storage of 30.

13. The minimum number of inter changes needed to convert the array 89,19,40,17,12,10,2,5,7,11,6,9,70 into a heap with maximum element at the root is
A. 1
B. 2
C.4
D. None of these

14. The const feature can be applied to
A. an identifier
B. an array
C. an array argument
D. All of these

15. Choose the correct statements
A. All The elements of the array should be of the same data type and storage class
B. The number of subscripts determines the dimension of the array
C. The array elements need not be of the same storage class
D. In an array definition. the subscript can be any expression yielding a non-zero integer value

16. If storage class is missing in the array definition, by default it will be taken to be
A. automatic
B. external
C. static
D. either automatic or external depending on the place of occurrence

Explanation :
If it is coming within a function, the storage class will be taken to be automatic. otherwise external

17. Consider the array definition
int num [10] = {3, 3, 3};
Pick the Correct answers
A. num [9] is the last element of the array num
B. The value of num [ 8] is 3
C. The value of num [ 3 ] is 3
D. None of the above

18. Consider the following type definition.
typedef char x[10]; x myArray[5];
What will sizeof(myArray) be ? (Assume one character occupies 1 byte)
A. 15 bytes
B. 10 bytes
C. 50 bytes
D.30 bytes

19. While passing an array as an actual argument, the function call must have the array name
A. with empty brackets
B. with its size
C. alone
D. none of the above

20. The following program
main( ){static int a[ ] = { 7, 8, 9 } ;printf( “%d”, 2[ a ] + a[ 2 ] ) ;}
A. results in bus error
B. results in segmentation violation error
C. will not compile successfully
D. none of the above

Explanation :
a[2] will be converted to *(a + 2).
*(a + 2) can as well be written as *(2 + a ) .
*(2 + a ) is nothing but 2 [a] . So. a [2] is essentially same as 2 [a] which is same as * ( 2 + a ). So. it prints 9 + 9 = 18. Some of the modem compilers don’t accept 2[a]