ExamAdept

Which of the following is the correct ways to set a value 3.14 in a variable pi such that it cannot be modified?

A:

float pi = 3.14F;

B:

#define pi 3.14F;

C:

const float pi = 3.14F;

D:

const float pi; pi = 3.14F;

Answer: C

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Which of the following statements are correct?

We can assign values of any type to variables of type object.
When a variable of a value type is converted to object, it is said to be unboxed.
When a variable of type object is converted to a value type, it is said to be boxed.
Boolean variable cannot have a value of null.
When a value type is boxed, an entirely new object must be allocated and constructed.

A:

2, 5

B:

1, 5

C:

3, 4

D:

2, 3

Answer: B

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Which of the following is the correct size of a Decimal datatype?

A:

8 Bytes

B:

4 Bytes

C:

10 Bytes

D:

16 Bytes

Answer: D

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Which of the following statements is correct about the C#.NET code snippet given below?

short s1 = 20;
short s2 = 400;
int a;
a = s1 * s2;

A:

A value 8000 will be assigned to a.

B:

A negative value will be assigned to a.

C:

During arithmetic if the result exceeds the high or low value of the range the value wraps around till the other side of the range.

D:

An error is reported as widening conversion cannot takes place.

Answer: A

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What will be the output of the following code snippet when it is executed?

    int x = 1; 
    float y = 1.1f;
    short z = 1;
    Console.WriteLine((float) x + y * z - (x += (short) y));

A:

0.1

B:

1.0

C:

1.1

D:

11

Answer: A

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Questions for: Datatypes