This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Bit-fields – 1”.
Pre-requisite for C Bit-fields MCQ set: Video Tutorial on C Bit-fields.
1. What is the correct syntax to initialize bit-fields in an structure?
a)
struct temp { unsigned int a : 1; }s;
b)
struct temp { unsigned int a = 1; }s;
c)
struct temp { unsigned float a : 1; }s;
d) None of the mentioned
View Answer
Explanation: None.
2. Which of the following data types are accepted while declaring bit-fields?
a) char
b) float
c) double
d) none of the mentioned
View Answer
Explanation: None.
3. Which of the following reduces the size of a structure?
a) union
b) bit-fields
c) malloc
d) none of the mentioned
View Answer
Explanation: None.
4. For what minimum value of x in a 32-bit Linux OS would make the size of s equal to 8 bytes?
struct temp
{
int a : 13;
int b : 8;
int c : x;
}s;
a) 4
b) 8
c) 12
d) 32
View Answer
Explanation: None.
5. 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)
struct temp
{
int a : 1;
int b : 2;
int c : 4;
int d : 4;
}s;
a) 25%
b) 33.3%
c) 50%
d) 75%
View Answer
Explanation: None.
6. In the following declaration of bit-fields, the constant-expression specifies __________
struct-declarator: declarator type-specifier declarator opt : constant-expression
a) The width of the field in bits
b) Nothing
c) The width of the field in bytes
d) Error
View Answer
Explanation: None.
7. In the following declaration of bit-fields, the constant-expression must be __________
struct-declarator: declarator type-specifier declarator opt : constant-expression
a) Any type
b) Nothing
c) Integer value
d) Nonnegative integer value
View Answer
Explanation: None.
8. Which of the following is not allowed?
a) Arrays of bit fields
b) Pointers to bit fields
c) Functions returning bit fields
d) None of the mentioned
View Answer
Explanation: None.
9. Bit fields can only be declared as part of a structure.
a) false
b) true
c) Nothing
d) Varies
View Answer
Explanation: None.
10. What is the order for the following C declarations?
short a : 17; int long y : 33;
a) Legal, legal
b) Legal, illegal
c) Illegal, illegal
d) Illegal, legal
View Answer
Explanation: None.
Sanfoundry Global Education & Learning Series – C Programming Language.
To practice all areas of C language, here is complete set of 1000+ Multiple Choice Questions and Answers.
- Check Computer Science Books
- Apply for Computer Science Internship
- Check C Books
- Watch Advanced C Programming Videos
- Practice Computer Science MCQs