Deck 2: C Programming: Data Types, Constructors, Inheritance, and Exception Handling

Question 1

Which of the following statements are correct about data types?1. If the integer literal exceeds the range of byte, a compilation error will occur.2. We cannot implicitly convert non-literal numeric types of larger storage size to byte.3. Byte cannot be implicitly converted to float.4. A char can be implicitly converted to only int data type. 5. We can cast the integral character codes.

A)1,3,5
B)2,4
C)3,5
D)1,2,5

Answer 1

1,2,5

Question 2

Which of the following is NOT an Integer?

A)Char
B)Byte
C)Integer
D)Long

Answer 2

Char

Question 3

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.Write.Line((float) x + y * z - (x += (short) y));

A)0.1
B)1.0
C)1.1
D)11

Answer 3

0.1

Question 4

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

A)8 bytes
B)4 bytes
C)10 bytes
D)None of the above

Question 5

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

Question 6

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;

Question 7

Which of the following can be used to terminate a while loop and transfer control outside the loop?1. exit while2. continue3. exit statement4. break5. goto

A)1,3
B)2,4
C)3,5
D)4,5

Question 8

Which of the following statements are correct about the C#.NETcode snippet given below?if (age > 18 && no < 11) a = 25;1. The condition no < 11 will be evaluated only if age > 18 evaluates to True.2. The statement a = 25 will get executed if any one condition is True.3. The condition no < 11 will be evaluated only if age > 18 evaluates to False.4. The statement a = 25 will get executed if both the conditions are True.5. && is known as a short circuiting logical operator.

A)1,3
B)2,5
C)1,4,5,
D)3,4,5

Question 9

Which of the following is the correct output for the C#.NET code snippet given below? Console.WriteLine(13 / 2 + " " + 13 % 2);

A)6.5 1
B)6.5 0
C)6 0
D)6 1

Question 10

Which of the following statements are correct?1. Instance members of a class can be accessed only through an object of that class.2. A class can contain only instance data and instance member function.3. All objects created from a class will occupy equal number of bytes in memory.4. A class can contain Friend functions.5. A class is a blueprint or a template according to which objects are created.

A)1,3,5
B)2,4
C)3,5
D)2,4,5

Question 11

Which of the following is the correct way to create an object of the class Sample?1. Sample s = new Sample();2. Sample s;3. Sample s; s = new Sample();4. s = new Sample();

A)1,3
B)2,4
C)1,2,3
D)4,5

Question 12

Which of the following statements is correct about constructors?

A)If we provide a one-argument constructor then the compiler still provides a zeroargument constructor.
B)Overloaded constructors have the same name as the class name
C)Overloaded constructors cannot use optional arguments.
D)If we do not provide a constructor, then the compiler provides a zero-argument constructor.

Question 13

Which of the following statements is correct?

A)There is one garbage collector per program running in memory.
B)There is one common garbage collector for all programs.
C)An object is destroyed by the garbage collector when only one reference refers to it.
D)We have to specifically run the garbage collector after executing Visual Studio.NET.

Question 14

Which of the following can be facilitated by the Inheritance mechanism?1. Use the existing functionality of base class.2. Overrride the existing functionality of base class.3. Implement new functionality in the derived class.4. Implement polymorphic behaviour.5. Implement containership.

A)1,2,3
B)3,4
C)2,4,5
D)3,5

Question 15

Which one of the following statements is correct?

A)Array elements can be of integer type only.
B)The rank of an Array is the total number of elements it can contain.
C)The length of an Array is the number of dimensions in the Array.
D)The default value of numeric array elements is zero.

Question 16

Which of the following statements are correct about arrays used in C#.NET?1. Arrays can be rectangular or jagged.2. Rectangular arrays have similar rows stored in adjacent memory locations.3. Jagged arrays do not have an access to the methods of System.Array Class.4. Rectangular arrays do not have an access to the methods of System.Array Class.5. Jagged arrays have dissimilar rows stored in non-adjacent memory locations.

A)1,2
B)1,3,5
C)3,4
D)1,2,5

Question 17

Which of the following statements are correct?1. A struct can contain properties.2. A struct can contain constructors.3. A struct can contain protected data members.4. A struct cannot contain methods.5. A struct cannot contain constants.

A)1,2
B)3,4
C)1,2,4
D)3,5

Question 18

Which of the following will be the correct output for the C#.NET code snippet given below?String s1 = "ALL MEN ARE CREATED EQUAL";String s2; s2 = s1.Substring(12, 3);Console.WriteLine(s2);

A)ARE
B)CRE
C)CR
D)REA

Question 19

If s1 and s2 are references to two strings, then which of the following is the correct way to compare the two references?

A)s1 is s2
B)s1=s2
C)s1==s2
D)s1.Equals(s2)

Question 20

Which of the following statements is correct about an Exception?

A)It occurs during compilation.
B)It occurs during linking.
C)It occurs at run-time.
D)It occurs during Just-In-Time compilation.

Question 21

Which of the following statements are correct about exception handling in C#.NET?1 If an exception occurs then the program terminates abruptly without getting any chance to recover from the exception. 2 No matter whether an exception occurs or not, the statements in the finally clause (if present) will get executed.3 A program can contain multiple finally clauses.4 A finally clause is written outside the try block.5 Finally clause is used to perform cleanup operations like closing the network/database connections.

A)1 only
B)2 only
C)2 and 5 only
D)3 and 4 only

Question 22

______ parameters are used to pass results back to the calling method.

A)Input
B)Reference
C)Value
D)Output

Question 23

The formal-parameter-list is always enclosed in _______.

A)Square
B)Semicolon
C)Parenthesis
D)Colon

Question 24

_______ variables are visible only in the block they are declared.

A)System
B)Global
C)Local
D)Console

Question 25

C# does not support _____ constructors.

A)parameterized
B)parameter-less
C)Class
D)Method

Question 26

A structure in C# provides a unique way of packing together data of ______ types.

A)Different
B)Same
C)Invoking
D)Calling

Question 27

Struct's data members are ____________ by default.

A)Protected
B)Public
C)Private
D)Default

Question 28

A _______ creates an object by copying variables from another object.

A)Copy constructor
B)Default constructor
C)Invoking constructor
D)Calling constructor

Question 29

The methods that have the same name, but different parameter lists and different definitions is called______.

A)Method Overloading
B)Method Overriding
C)Method Overwriting
D)Method Overreading

Question 30

The C# provides special methods known as _____ methods to provide access to data members.

A)Loop
B)Functions
C)Methods
D)Accessor

Question 31

Storage location used by computer memory to store data for usage by an application is ?

A)Pointers
B)Constants
C)Variable
D)None of the mentioned

Question 32

Which of these can be overloaded?

A)Constructors
B)Methods
C)Both a & b
D)None of the mentioned

Question 33

Number of constructors a class can define of ?

A)1
B)2
C)Any number
D)None of the mentioned

Question 34

Correct statement about constructors in C#.NET is ?

A)Constructor cannot be overloaded
B)Constructor allocate space for object in memory
C)Constructor are never called explicitly
D)Constructor have same name as name of the class

Question 35

Constructors are used to

A)initialize the objects
B)construct the data members
C)both a & b
D)None of the mentioned

Question 36

To overload a method which of the following statement is false?

A)If the return type is different methods are overloaded
B)Name of the overloaded method should be same
C)Type of the parameter should be different
D)Order of the parameter should be different if types are same

Question 37

Which of the following statements is correct about constructors in C#.NET?

A)A constructor cannot be declared as private
B)A constructor cannot be overloaded
C)A constructor can be a static constructor
D)None of the mentioned

Question 38

What is return type of constructors?

A)int
B)float
C)void
D)None of the mentioned

Question 39

Which method have same name as that of its class?

A)delete
B)class
C)constructor
D)None of mentioned

Question 40

Which of following statement are correct about functions?

A)C# allows a function to have arguments with default values
B)Redefining a method parameter in the method's body causes an exception
C)C# allows function to have arguments of private type
D)Omitting the return type in method definition results into exception