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

Accepted Answer

1. If an integer literal exceeds the range of a byte (which is -128 to 127), it will indeed cause a compilation error because the literal cannot be stored in the byte variable without explicit casting. 2. Implicit conversion from larger numeric types to smaller ones, like from int to byte, is not allowed because it could lead to data loss. This requires explicit casting. 5. Integral character codes, such as ASCII values, can be cast to characters, allowing numerical values to be treated as characters and vice versa.

Question 2

Which of the following is NOT an Integer?
A)Char
B)Byte
C)Integer
D)Long

Accepted Answer

Char is not an integer; it represents characters like letters and symbols, not integer numbers. Byte, Integer, and Long are all integer types representing numbers at different sizes.

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

Accepted Answer

The expression evaluates as follows: (float)x + y * z - (x += (short)y) becomes (1.0) + (1.1 * 1) - (1 += 1) = 1.1 + 1 - 2 = 0.1. The casting and operations follow standard arithmetic and casting rules in C#.

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

Accepted Answer

The size of a Decimal datatype is typically 16 bytes, which is not listed among the options provided.

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

Accepted Answer

1. We can assign values of any type to variables of type object because object is the base type for all data types in C#. 5. When a value type is boxed, a new object is indeed allocated and constructed to hold the value.

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;

Accepted Answer

Option C is correct because it uses the `const` keyword to declare and initialize the variable `pi` as a constant floating-point number with the value 3.14. This means that the value of `pi` cannot be modified after its initial assignment.

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

Accepted Answer

Break and goto can be used to terminate a while loop and transfer control outside the loop. Break directly exits the loop, while goto transfers control to a specified label, which can be outside the loop.

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

Accepted Answer

1. The use of && (AND operator) ensures that the second condition (no < 11) is evaluated only if the first condition (age > 18) is true, due to short-circuiting. 4. For the statement a = 25 to be executed, both conditions must be true, as dictated by the use of the AND operator. 5. The && operator is indeed known as a short-circuiting logical operator because it stops evaluating further conditions as soon as one is found to be false.

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

Accepted Answer

In C#.NET, the division of two integers results in an integer division, so 13 / 2 equals 6. The modulus operator (%) gives the remainder of the division of its operands, so 13 % 2 equals 1. Therefore, the output is "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

Accepted Answer

Instance members are accessed through objects, objects of the same class occupy equal memory, and a class is a blueprint for objects.

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

Accepted Answer

Options 1 and 3 are correct ways to create an object of a class in Java. Option 1 does it in a single line, while option 3 does it in two steps: declaration followed by instantiation.

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.

Accepted Answer

The answer of Which of the following statements is correct...

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.

Accepted Answer

Garbage collection is a common service provided by the runtime environment (like the JVM for Java or the CLR for .NET languages) that automatically recycles memory once objects are no longer in use. There isn't a separate garbage collector for each program; rather, the environment managing the execution of programs provides this service universally. This means there's a common mechanism across all programs running in that environment, not one per program or requiring manual initiation after specific tasks like using 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

Accepted Answer

Inheritance allows for the use of existing functionality of a base class, overriding that functionality in a derived class, and implementing new functionality in the derived class. It is a key feature for achieving polymorphism but not directly related to containership, which is more about composition.

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.

Accepted Answer

The default value for numeric array elements in many programming languages, including C, C++, and Java, is zero. This means when an array of numeric types is instantiated, all its elements are initialized to zero unless explicitly assigned a different value. Options A, B, and C are incorrect because arrays can contain elements of various types (not just integers), the rank of an array refers to the number of dimensions (not the total number of elements), and the length of an array typically refers to the total number of elements it contains (not the number of dimensions).

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

Accepted Answer

1. Arrays in C# can indeed be rectangular or jagged. Rectangular arrays are multi-dimensional arrays where each row has the same number of columns. Jagged arrays are arrays of arrays, where each "row" can have a different size.2. Rectangular arrays store their elements in contiguous memory locations, which allows for efficient access and manipulation of array elements.5. Jagged arrays consist of arrays that can have different lengths and thus are stored in non-adjacent memory locations. Each row in a jagged array is an independent array, and these arrays can be located anywhere in memory.

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

Accepted Answer

1. A struct in programming languages like C# can indeed contain properties, allowing for encapsulation of data.2. A struct can also contain constructors, which can be used to initialize its fields or properties, although it cannot contain a parameterless constructor because a default one is provided implicitly.

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

Accepted Answer

The Substring method in C# extracts a substring from a string starting at a specified position and with a specified length. In this case, it starts at position 12 (0-based indexing) and extracts 3 characters, which corresponds to "CRE".

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)

Accepted Answer

The answer of If s1 and s2 are references to...

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.

Accepted Answer

Exceptions are events that occur during the execution of programs that disrupt the normal flow of instructions, i.e., at run-time.

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

Which of the following is NOT an Integer?

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) ) ;

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

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

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

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

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() ;

Which of the following statements is correct about constructors?

Which of the following statements is correct?

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.

Which one of the following statements is correct?

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.

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) ;

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

Which of the following statements is correct about an Exception?