11.
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 & Explanation
Answer: Option B
Explanation:
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12.
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;
E. pi = 3.14F;
Answer & Explanation
Answer: Option C
Explanation:
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13.
Which of the following statements are correct about data types?
Each value type has an implicit default constructor that initializes the default value of that type.
It is possible for a value type to contain the null value.
All value types are derived implicitly from System.ValueType class.
It is not essential that local variables in C# must be initialized before being used.
Variables of reference types referred to as objects and store references to the actual data.
A. 1, 3, 5
B. 2, 4
C. 3, 5
D. 2, 3, 4
Answer & Explanation
Answer: Option A
Explanation:
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14.
Which of the following are the correct way to initialise the variables i and j to a value 10 each?
int i = 10; int j = 10;
int i, j;
i = 10 : j = 10;
int i = 10, j = 10;
int i, j = 10;
int i = j = 10;
A. 2, 4
B. 1, 3
C. 3, 5
D. 4, 5
Answer & Explanation
Answer: Option B
Explanation:
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15.
Which of the following statement correctly assigns a value 33 to a variable c?
byte a = 11, b = 22, c;
A. c = (byte) (a + b);
B. c = (byte) a + (byte) b;
C. c = (int) a + (int) b;
D. c = (int)(a + b);
E. c = a + b;
Answer & Explanation
Answer: Option A
Explanation:
No answer description available for this question.