C Data Types Questions with Answers | C Programming MCQ | Page 5

C Data Types questions with answers help learners understand how data is stored, manipulated, and used in C programming. Data types form the foundation of C as they define the type of data a variable can hold, such as int, float, char, or double. Mastering C data types is essential for students preparing for placement exams or programming interviews at companies like TCS, Infosys, and Wipro. This topic often features in C programming MCQs and technical test questions that evaluate understanding of memory allocation, data precision, and type conversions. Practice these programming questions and answers to strengthen your core knowledge and prepare for real-world coding challenges.

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Q41

What is the purpose of "auto" storage class?

A Automatic storage
B Static storage
C Global storage
D Register storage

Answer: Option A

Explanation: auto is the default storage class for local variables (usually omitted).

Q42

Which data type is suitable for storing a student's grade point average?

A int
B char
C float
D double

Answer: Option C

Explanation: float is suitable for GPA as it requires decimal precision.

Q43

What is the range of "signed int" on a 32-bit system?

A -128 to 127
B 0 to 255
C -32,768 to 32,767
D -2,147,483,648 to 2,147,483,647

Answer: Option D

Explanation: signed int ranges from -2,147,483,648 to 2,147,483,647 on 32-bit systems.

Q44

Which data type is used for storing double precision floating-point numbers?

A float
B double
C long double
D int

Answer: Option B

Explanation: double is the double precision floating-point type in C.

Q45

What is the size of "char" data type?

A 1 byte
B 2 bytes
C 4 bytes
D Depends on system

Answer: Option A

Explanation: char always occupies 1 byte regardless of the system.

Q46

Which of the following is a user-defined data type?

A int
B float
C char
D struct

Answer: Option D

Explanation: struct allows users to define their own data types by grouping variables.

Q47

What is the purpose of "static" storage class?

A Preserves value
B Makes variable global
C Increases speed
D Reduces size

Answer: Option A

Explanation: static preserves variable value between function calls and limits scope to file/function.

Q48

Which data type would you use for a flag that can be true or false?

A bool
B boolean
C int
D flag

Answer: Option C

Explanation: C uses int with 0 for false and non-zero for true as there is no built-in boolean.

Q49

What is the range of "unsigned short int"?

A 0 to 255
B 0 to 65,535
C -32,768 to 32,767
D 0 to 4,294,967,295

Answer: Option B

Explanation: unsigned short int ranges from 0 to 65,535.

Q50

Which format specifier is used for "long int"?

A %d
B %ld
C %li
D %lld

Answer: Option B

Explanation: %ld is used for long int in printf/scanf functions.

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