C# (C Sharp) MCQs with answers Page - 22

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Q. In C#, a single-line comment starts with ___.

  • (A) Two forward slashes (//)
  • (B) Two backward slashes (\)
  • (C) A hash character (#)
  • (D) A dollar character ($)

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Q. In C#, the multi-line comments placed within the ___.

  • (A) // and //
  • (B) \ and //
  • (C) <!-- and -->
  • (D) /* and */

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Q. What is the correct syntax to declare a variable in C#?

  • (A) type variableName = value;
  • (B) type variableName;
  • (C) variableName as type = value;
  • (D) Both A and B.

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Q. Which data type is used to store text value in C#?

  • (A) text
  • (B) txt
  • (C) string
  • (D) str

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Q. Which C# keyword is used to define a constant?

  • (A) define
  • (B) fixed
  • (C) constant
  • (D) const

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Q. What is the correct syntax to define a C# constant?

  • (A) const type constant_name;
  • (B) const type constant_name = value;
  • (C) const constant_name as type;
  • (D) const constant_name as type = value;

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Q. Which is not a valid C# data type?

  • (A) long
  • (B) int
  • (C) float
  • (D) complex

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Q. Which is the correct order for implicit type conversion to convert a smaller to a larger type in C#?

  • (A) char -> int -> long -> float -> double
  • (B) bool -> char -> int -> long -> float -> double
  • (C) char -> int -> float -> long -> double
  • (D) bool -> char -> int -> long -> double -> float

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Q. Which is the correct order for explicit type conversion to convert a larger to a smaller type in C#?

  • (A) double -> float -> long -> int -> char -> bool
  • (B) double -> float -> long -> int -> char
  • (C) float -> double -> long -> int -> char
  • (D) float -> double -> long -> int -> char -> bool

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Q. Which is the correct C# statement to convert a float value to int explicitly?

  • (A) int_variable = (int) float_variable;
  • (B) int_variable = float_variable;
  • (C) int_variable = (int) (float_variable);
  • (D) int_variable = int *float_variable);

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