Motorola Placement Paper -: .Net Questions With Answers

Motorola Previous Years Solved Sample Placement Papers

1. Which symbols are used to mark the beginning and end of a code block?

   A: Square brackets []

   B: Curly braces {}

   C: Round brackets ()

   D: Double-quotes ""

   Ans: B

   Explanation:

   C# code block begins and ends by the Curly braces {}.

2. Every C# statement is terminated by ___.

   A: Colon (:)

   B: Semicolon (;)

   C: Comma (,)

   D: Dot (.)

   Ans: B

   Explanation:

   Every C# statement is terminated by a semicolon (;).

3. Is C# programming language case-sensitive?

   A: Yes

   B: No

   Ans: A

   Explanation:

   Yes, C# programming language is case-sensitive.

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

   A: Two forward slashes (//)

   B: Two backward slashes (\\)

   C: A hash character (#)

   D: A dollar character ($)

   Ans: A

   Explanation:

   In C#, a single-line comment starts with two forward slashes (//).

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

   A: // and //

   B: \\ and //

   C:

   D: /* and */

   Ans: D

   Explanation:

   In C#, the multi-line comments are placed within the /* and */.

6. 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

   Ans: D

   Explanation:

   Both of the above syntaxes can be used to declare a variable:

   • type variableName = value; - It defines the type and assigns the value
   • type variableName; - It defines the type only

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

   A: text

   B: txt

   C: string

   D: str

   Ans: C

   Explanation:

   The string data type is used to store text values in C#.

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

   A: define

   B: fixed

   C: constant

   D: const

   Ans: D

   Explanation:

   The const keyword is used to define a constant in C#.

9. 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;

   Ans: B

   Explanation:

   The correct syntax to define a C# constant is:

   const type constant_name = value;

   Note: A const field requires a value to be provided.

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

    A: long

    B: int

    C: float

    D: complex

    Ans: D

    Explanation:

    There is no complex data type in C#.

11. 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

    Ans: A

    Explanation:

    The implicit type conversion is done in the following order: char -> int -> long -> float -> double.

12. 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

    Ans: B

    Explanation:

    The explicit type conversion is done in the following order: double -> float -> long -> int -> char.

13. 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);

    Ans: A

    Explanation:

    The following syntax is used to convert a float value to int explicitly:

    int_variable = (int) float_variable;