Which of the following statements are correct?
1/ We can assign values of any type to variables of type object.
2/ When a variable of a value type is converted to object, it is said to be unboxed.
3/ When a variable of type object is converted to a value type, it is said to be boxed.
4/ Boolean variable cannot have a value of null.
5/ 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
2-
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;
3-
Which of the following statements are correct about data types?
1/ Each value type has an implicit default constructor that initializes the default value of that type.
2/ It is possible for a value type to contain the null value.
3/ All value types are derived implicitly from System.ValueType class.
4/ It is not essential that local variables in C# must be initialized before being used.
5/ 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
4-
Which of the following are the correct way to initialise the variables i and j to a value 10 each?
1/ int i = 10; int j = 10;
2/ int i, j;
i = 10 : j = 10;
3/ int i = 10, j = 10;
4/ int i, j = 10;
5/ int i = j = 10;
A -
2, 4
B -
1, 3
C -
3, 5 D
D -
4, 5
5-
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);
6-
Which of the following statements are correct about datatypes in C#.NET?
1/ Every datatype is either a value type or a reference type.
2/ Value types are always created on the heap.
3/ Reference types are always created on the stack.
4/ Mapping of every value type to a type in Common Type System facilitates Interoperability in C#.NET.
5/ Every reference type gets mapped to a type in Common Type System.
A -
1, 3
B -
2, 5
C -
1, 4
D -
3, 4
7-
Which of the following is the correct default value of a Boolean type?
A -
0
B -
1
C -
True
D -
False
8-
What does the following C#.NET code snippet will print?
A -
Prints 1 to 9
B -
Prints 2 to 8
C -
Prints 2 to 9
D -
Compile error at label:.
9-
Which of the following is the correct output for the C#.NET program given below?
A -
20 16 12 84 0 -4 -8
B -
20 16 12 8 4 0
C -
20 16 12 8 4 0 -4 -8 -12
D -
16 12 8 4 0
10-
Which of the following statements is correct?
A -
It is not possible to extend the if statement to handle multiple conditions using the else-if arrangement.
B -
The switch statement can include any number of case instances with two case statements having the same value.
C -
A jump statement such as a break is required after each case block excluding the last block if it is a default statement.
D -
The if statement selects a statement for execution based on the value of a Boolean expression.
