Question

 31. True or False: The condition in the following if statement is a syntax error:

 int number=50;

……

 if (number)

……

 32. True or False: The standard C functlon strlen) will return 4 when invoked upon the varlable

 name, declared below:

 char namel = (e', 'p', 't', 's', '\0', '1', '2', '1', '\0'];

 33. True or False: A structure is a collection of related variables under one name.

 34. True or False: In C, output parameters allow for a function to return more than one value Indirectly.

 35. True or False: A variable of a specific struct type can be copied to another variable of the same struct type through strcpy ().

 36. True or False: An array of structs may be used to replace parallel arrays, if the appropriate attributes are defined in the struct.

 37. True or False: Function malloc () is used to dynamically allocate memory at program runtime 38. True or False: Shifting a number right by two-bit positions, using >>, is the same as multiplying the number by four.

 39. True or False: Character arrays that are passed to functions in the C character library (ctype.h)

 need to always have a null character as the last terminating element in order to achieve the correct result.

 40. True or False: An iterative construct (i.e. a while, for, do-while loop) may always be used Instead of recursion.

 41. True or False: The bitwise AND (&) operator may be used to clear individual bits.

 42. True or False: More bytes of memory are required for a double precision variable than a character variable.

 43. True or False: Given the following snipet of code:

 char tmy ptr= "CotS 121";

 printf ("%e", A(my ptr++));

 The output of the printf is 'p'.

 44. True or False: The functions in <string.h> use the length of the string to determine the end of the string.

 5. True or False: The strcmp function in <string h> will return 0 when comparing "CptS121" to "cpts121".

Answer 1

Solution:

Question 31. The condition in the following if statement is a syntax error:

int number = -50;
...
if(number)
...

Answer:
False

Explanation:
in C if a number is given as condition to a if statement if it is 0 then it is evaluated to false else it is true.So the statement has no syntax errors.

Question 32. The standard C function strlen() will return 4 when invoked upton the variable name ,declared below:
       char name[]={'c','p','t','s','\0','1','2','1','\0'};

Question 32. The standard C function strlen() will return 4 when invoked upton the variable name ,declared below:
       char name[]={'c','p','t','s','\0','1','2','1','\0'};

Answer:
True

Explanation:
The function strlen calculates the number of characters untill the first occurence of '\0'. Here the number of characters before '\0' is 4.

Question 33. A structure is a collection of related variables under one name.

Answer:
True

Explanation:
Structure is a user defined datatype to combine data of different types together.So it can be a collection of related variables under a common name.

Question 34. In C,output parameters allow for a function to return more than one value indirectly.

Answer:
False

Explanation:
No matter a function can return only a single return value.
Even if a array is returned it is considered as a single variable.

Question 35. A variable of a specific struct type can be copied to another variable of the same struct type through strcpy

Answer:
False

Explanation:
We can copy a string to structure if it has a string variable inside it using strcpy().But not for all types of variables

Question 36. An array of structs can be used to replace parallel arrays,if the appropriate attributes are defined in the struct.

Answer:
True

Explanation:
The struct array can be used to replace parallel arrays .We can acces the variables of struct array using indices

Question 37. Function malloc() is used to dynamically allocate memory at program at runtime.

Answer:
True

Explanation:
To allocate memory at runtime is the function of malloc

Question 38. Shifting a number right by two bit positions using >>, is the same as multiplying the number by four.

Answer:
True

Explanation:
Shifting a number right by 1 means multiplying the number by 2.
So Shifting a number right by 2 means multiplying the number by 4.

Question 39. Character arrays that are passed to fuctions in the C character library (ctype.h) need to always have a null character as the last terminating element in order to acheive the correct result

Answer:
False

Explanation:

The compiler will automatically add a '\0' to the C string.
So It is not necessary to have a null character always.

Question 40. An iterative construct (ie a while ,for ,do-while loop) may always be used instead of recursion.

Answer:
True

Question 41. The bistwise AND (&) operator may be used to clear individual bits.

Answer:
True

Explanation:
The bitwise AND may be used to clear selected bits (or flags) of a register in which each bit represents an individual Boolean state.

Question 42. More bytes of memory are required for a double precision variable than a character variable

Answer:
True

Explanation:
char data type variable requirews only 1 byte whereas
double data type requires 8 bytes.

Question 43. Given the following snipet of code.
   char *my_ptr="Cpt$ 121";
   printf("%c",*(my_ptr++));

Answer:
False

Explanation:
the character at *(my_ptr++) wil be printed .
*my_ptr points to 0 th index of the array.
Only after printing the character the pointer will be incremented.
So the value printed will be "C".

Question 44. The functions in use the length of the string to determine the end of the string

Answer:
False

Explanation:
The functions in uses '\0' to mark the end of he string.
If there is no '\0' it will add it to the string.

Question 44. The strcmp() function in will return 0 when comparing "CptS121" to "cpts121"

Answer:
False

Explanation:
Both are different values .
So the result will not be 0.