Structure And Union MCQ

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typedef int (*PFI)(char *, char *)creates . . . . . . . .

ক
type PFI, for pointer to function (of two char * arguments) returning int

খ
error

গ
type PFI, function (of two char * arguments) returning int

ঘ
type PFI, for pointer
Which option is not possible for the following function call? <pre><code class="c-program">func(&s.a); //where s is a variable of type struct and a is the member of the struct.</code></pre>

ক
Compiler can access entire structure from the function

খ
Individual member's address can be displayed in structure

গ
Individual member can be passed by reference in a function

ঘ
None of the mentioned
Presence of code like "s.t.b = 10" indicates . . . . . . . .

ক
Syntax Error

খ
Structure

গ
double data type

ঘ
An ordinary variable name
In the following declaration of bit-fields, the constant-expression must be . . . . . . . . <pre><code class="c-program">struct-declarator:declaratortype-specifier declarator opt : constant-expression</code></pre>

ক
Any type

খ
Nothing

গ
Integer value

ঘ
Nonnegative integer value
Which of the following will stop the loop at the last node of a linked list in the following C code snippet? <pre><code class="c-program">struct node{ struct node *next;};</code></pre>

ক
[ A. <pre><code class="c-program">while (p != NULL){ p = p->next;}</code></pre> B. <pre><code class="c-program">while (p->next != NULL){ p = p->next;}</code></pre>

খ
<pre><code class="c-program">while (1){ p = p->next; if (p == NULL) break;}</code></pre>

গ
All of the mentioned
Which of the given option is the correct method for initialization? <pre><code class="c-program">typedef char *string;</code></pre>

ক
*string *p = "Hello";

খ
string p = "Hello";

গ
*string p = 'A';

ঘ
Not more than one space should be given when using typedef
Calculate the % of memory saved when bit-fields are used for the following C structure as compared to with-out use of bit-fields for the same structure? (Assuming size of int = 4) <pre><code class="c-program">struct temp{ int a : 1; int b : 2; int c : 4; int d : 4;}s;</code></pre>

ক
25%

খ
33.3%

গ
50%

ঘ
75%
Which of the following is an incorrect syntax to pass by reference a member of a structure in a function? <pre><code class="c-program">(Assume: struct temp{int a;}s;)</code></pre>

ক
func(&s.a);

খ
func(&(s).a);

গ
func(&(s.a));

ঘ
none of the mentioned
Which is the correct syntax to use typedef for struct?

ক
[ A. <pre><code class="c-program">typedef struct temp{ int a;}TEMP;</code></pre> B. <pre><code class="c-program">typedef struct{ int a; }TEMP;</code></pre>

খ
<pre><code class="c-program">struct temp{ int a;};typedef struct temp TEMP;</code></pre>

গ
All of the mentioned
Which function is responsible for searching in the table? (For #define IN 1, the name IN and replacement text 1 are stored in a "table")

ক
findout(s);

খ
lookup(s);

গ
find(s);

ঘ
lookfor(s);
User-defined data type can be derived by . . . . . . . .

ক
struct

খ
enum

গ
typedef

ঘ
all of the mentioned
What type of data is holded by variable u int in the following C code? <pre><code class="c-program">#include <stdio.h>union u_tag{ int ival; float fval; char *sval;} u;</code></pre>

ক
Will be large enough to hold the largest of the three types;

খ
Will be large enough to hold the smallest of the three types;

গ
Will be large enough to hold the all of the three types;

ঘ
None of the mentioned
Which member of the union will be active after REF LINE in the following C code? <pre><code class="c-program">#include <stdio.h>union temp{ int a; float b; char c;};union temp s = {1,2.5,’A’}; //REF LINE</code></pre>

ক
a

খ
b

গ
c

ঘ
Such declaration are illegal
In the following declaration of bit-fields, the constant-expression specifies . . . . . . . . <pre><code class="c-program">struct-declarator:declaratortype-specifier declarator opt : constant-expression</code></pre>

ক
The width of the field in bits

খ
Nothing

গ
The width of the field in bytes

ঘ
Error
The number of distinct nodes the following struct declaration can point to is . . . . . . . . <pre><code class="c-program">struct node{ struct node *left; struct node *centre; struct node *right;};</code></pre>

ক
1

খ
2

গ
3

ঘ
All of the mentioned
Which function is responsible for recording the name "s" and the replacement text "t" in a table?

ক
install(s, t);

খ
fix(s, t);

গ
setup(s, t);

ঘ
settle(s, t);
Which of the following structure declaration will throw an error?

ক
struct temp{}s; main(){}

খ
struct temp{}; struct temp s; main(){}

গ
struct temp s; struct temp{}; main(){}

ঘ
None of the mentioned
Which option should be selected to work the following C expression? <pre><code class="c-program">string p = "HELLO";</code></pre>

ক
typedef char string;

খ
typedef char *string;

গ
typedef char string; and typedef char *string;

ঘ
Such expression cannot be generated in C
Members of a union are accessed as . . . . . . . .

ক
union-name.member

খ
union-pointer->member

গ
both union-name.member & union-pointer->member

ঘ
none of the mentioned
What is the correct syntax to initialize bit-fields in an structure?

ক
[ A. <pre><code class="c-program">struct temp{ unsigned int a : 1;}s;</code></pre> B. <pre><code class="c-program">struct temp{ unsigned int a = 1;}s;</code></pre>

খ
<pre><code class="c-program">struct temp{ unsigned float a : 1;}s;</code></pre>

গ
None of the mentioned
The size of a union is determined by the size of the . . . . . . . .

ক
First member in the union

খ
Last member in the union

গ
Biggest member in the union

ঘ
Sum of the sizes of all members
Which of the following is an incorrect syntax for pointer to structure? <pre><code class="c-program">(Assuming struct temp{int b;}*my_struct;)</code></pre>

ক
*my_struct.b = 10;

খ
(*my_struct).b = 10;

গ
my_struct->b = 10;

ঘ
Both *my_struct.b = 10; and (*my_struct).b = 10;
What is the correct syntax to declare a function foo() which receives an array of structure in function?

ক
void foo(struct *var);

খ
void foo(struct *var);

গ
void foo(struct var);

ঘ
none of the mentioned
How many bytes in memory taken by the following C structure? <pre><code class="c-program">#include <stdio.h>struct test{ int k; char c;};</code></pre>

ক
Multiple of integer size

খ
integer size+character size

গ
Depends on the platform

ঘ
Multiple of word size
Which of the following structure declaration doesn't require pass-by-reference?

ক
[ A. <pre><code class="c-program">struct{int a;}s;main(){}</code></pre> B. <pre><code class="c-program">struct temp{int a;};main(){ struct temp s;}</code></pre>

খ
<pre><code class="c-program">struct temp{int a;};main(){}struct temp s;</code></pre>

গ
none of the mentioned
Which of the following share a similarity in syntax? <pre><code class="c-program">1. Union, 2. Structure, 3. Arrays and 4. Pointers</code></pre>

ক
3 and 4

খ
1 and 2

গ
1 and 3

ঘ
1, 3 and 4
Can the following C code be compiled successfully? <pre><code class="c-program">#include <stdio.h>struct p{ int k; char c; float f;};int main(){ struct p x = {.c = 97, .f = 3, .k = 1}; printf("%f\n", x.f);}</code></pre>

ক
Yes

খ
No

গ
Depends on the standard

ঘ
Depends on the platform
How many union members can be initialized?

ক
Only one member of a union at any one time.

খ
Any number of members of a union at one time.

গ
Union members can not be initialized.

ঘ
Only two members of a union at any one time.

ঙ
Only two members of a union at any time..
The restriction with union is

ক
The first member can only be initialized.

খ
The last member can only be initialized.

গ
Any member can be initialized.

ঘ
Union can not be initialized

ঙ
No restriction at all.
Consider the following declarations: <pre><code class="c-program">union id{ char color; int size;};struct{ char country; int date; union id id;}flag;</code></pre> To assign a color to a flag, the correct statement would be

ক
flag.color = 'W';

খ
flag.id.color = 'W';

গ
flag.color = 'WHITE';

ঘ
flag.id.color = 'WHITE';

ঙ
color.flag = 'W';