Exercise
1. What is the maximun number of dimensions an array in C may have?
A. Two
B. eight
C. sixteen
D. Theoratically no limit. The only practical limits are memory size and compilers
View Answer
Ans : D
Explanation: The maximum size of an array is determined by the amount of memory that a program can access. On a 32-bit system, the maximum amount of memory that can be addressed by a pointer is 2^32 bytes which is 4 gigabytes. The actual limit may be less, depending on operating system implementation details.
2.A one dimensional array A has indices 1....75. Each element is a string and takes up three memory words. The array is stored at location 1120 decimal. The starting address of A[49] is
A. 1264
B. 1164
C. 1167
D. 1267
View Answer
Ans : A
Explanation: Start address of the element = base address of array + number of elements * size of each element = 1120 + 48 * 3 = 1264
3. What will be the address of the arr[2][3] if arr is a 2-D long array of 4 rows and 5 columns and starting address of the array is 2000?
A. 2048
B. 2056
C. 2052
D. 2042
View Answer
Ans : C
Explanation: 2000 + 4*(5*2) + 3*4 .
4. Array can be considered as set of elements stored in consecutive memory locations but having __________.
A. Same data type
B. Different data type
C. Same scope
D. None of these
View Answer
Ans : A
Explanation: Array store elements of same data type.
5.Array is an example of _______ type memory allocation.
A. Compile time
B. Run time
View Answer
Ans : A
Explanation: Array allocate memory at compile time
6. Size of the array need not be specified, when
A. Initialization is a part of definition
B. It is a formal parameter
C. It is a declaratrion
D. All of the above
View Answer
Ans : A
Explanation: int arr[] = {1,2,3}; In this case size of array need not to be specified when initialization is a part of defination.
7. The information about an array used in program will be stored in
A. Symbol Table
B. Activation Record
C. Dope Vector
D. Both A and B
View Answer
Ans : C
Explanation: In computer programming, a dope vector is a data structure used to hold information about a data object, e.g. an array, especially its memory layout.
8.
The parameter passing mechanism for an array is
A. call by value
B. call by reference
C. call by value-result
D. None of the above
View Answer
Ans : B
Explanation: None
9. A string that is a formal parameter can be declared
A. An array with empty braces
B. A pointer to character
C. Both A and B
D. None of the above
View Answer
Ans : C
Explanation: None
10. Which of the following function is more appropriate for reading in a multi-word string?
A. scanf()
B. printf()
C. gets()
D. puts()
View Answer
Ans : C
Explanation: The C library function gets() reads a line from stdin and stores it into the string pointed to by str.
11. Length of the string "letsfindcourse" is
A. 13
B. 14
C. 15
D. 12
View Answer
Ans : B
Explanation: None
12.How will you print \n on the screen?
A. printf("\n");
B. printf('\n');
C. printf("\\n");
D. printf("\"\n"")
View Answer
Ans : C
Explanation: The statement printf("\\n"); prints '\n' on the screen.
13. If the two strings are identical, then strcmp() function returns
A. -1
B. 1
C. 0
D. None
View Answer
Ans : C
Explanation: if both the strings are equal then strcmp return 0.
14. Which of the following statements are correct ?
1: A string is a collection of characters terminated by ''.
2: The format specifier %s is used to print a string.
3: The length of the string can be obtained by strlen().
4: The pointer CANNOT work on string.
A. 1,2,3
B. 1,2
C. 2,4
D. 3,4
View Answer
Ans : A
Explanation: None
15.Let x be an array.Which of the following operations is illegal?
i) ++x.
ii) x+1.
iii) x++.
iv) x*2.
A. I and II
B.
I, II and III
C.
II and III
D.
I, III and IV
E.
III and IV
View Answer
Ans : D
Explanation: None
16. Strcat function adds null character
A. Only if there is space
B. Always
C. Depends on the standard
D. epends on the compiler
View Answer
Ans : B
Explanation: None
17. Which of the following function sets first n characters of a string to a given character?
A. strset()
B. strnset()
C. strcset()
D. strinit()
View Answer
Ans : B
Explanation: char *strnset(char *s, int ch, size_t n); Sets the first n characters of s to ch
18. The library function used to find the last occurrence of a character in a string is
A. strnstr()
B. laststr()
C. strrchr()
D. strstr()
View Answer
Ans : C
Explanation: char *strrchr(const char *s, int c);
It scans a string s in the reverse direction, looking for a specific character c.
19. Which of the following gives the memory address of the first element in array foo, an array with 10 elements?
A. foo
B. &foo
C. foo[0]
D. &foo[0]
View Answer
Ans : A
Explanation: name of array give the base address of array which is the address of first element of array.
20. What will happen if in a C program you assign a value to an array element whose subscript exceeds the size of array?
A. The element will be set to 0.
B. The compiler would report an error.
C. The program may crash
D. None of the above
View Answer
Ans : C
Explanation: None
21. An array elements are always stored in ________ memory locations.?
A. Sequential
B. Random
C. Sequential and Random
D. None of the above
View Answer
Ans : A
Explanation: None
22. Let x be an array. Which of the following operations are illegal?
I. ++x
II. x+1
III. x++
IV. x*2
A. I and II
B. I, II and III
C. II and III
D. I, III and IV
View Answer
Ans : D
Explanation: int x[10]; * x will store the base address of array. *
Statement I, III and IV is invalid.
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