Free Test Constants, variables, ... – C Language

Q1: Which of the following is a valid integer constant in C?

A. 123 B. 12.3 C. "123" D. '123'

Q2: Which keyword is used to declare a constant in C?

A. const B. constant C. define D. var

Q3: Which of the following is not a valid variable name in C?

A. count B. _value C. 2ndValue D. total_sum

Q4: What is the default data type of a constant like 10 in C?

A. int B. float C. double D. long

Q5: Which data type can store a single character in C?

A. char B. string C. int D. bool

Q6: What will be the size of int data type in most modern compilers?

A. 4 bytes B. 2 bytes C. 8 bytes D. Depends on compiler

Q7: Which constant type is enclosed in double quotes in C?

A. Character constant B. String constant C. Integer constant D. Floating constant

Q8: What is the suffix for an unsigned integer constant in C?

A. u or U B. ul C. l D. d

Q9: Which keyword is used to define a variable whose value cannot change during execution?

A. final B. const C. volatile D. static

Q10: Which of the following is a floating-point constant?

A. 3.14 B. 314 C. "3.14" D. A314

Q11: Which of these is a valid way to define a constant in C?

A. #define PI 3.14 B. int PI=3.14; C. PI=3.14; D. constant PI=3.14;

Q12: What is the range of values for an unsigned char?

A. 0 to 127 B. 0 to 255 C. -128 to 127 D. -255 to 255

Q13: Which data type should be used to store large whole numbers in C?

A. short B. int C. long D. float

Q14: Which keyword is used to store a variable in memory for the lifetime of the program?

A. auto B. static C. register D. extern

Q15: What is the correct format specifier for an int in printf?

A. %i B. %d C. %c D. %f

Q16: Which escape sequence represents a new line in C?

A. \n B. \t C. \r D. \0

Q17: Which constant type is enclosed in single quotes?