R4RIN – MCQs, Mock Tests | C/C C programming language MCQ Questions Set 1

 Which of the following is correct?

1. A class is an instance of its objects
2. An object is an instance of its class
3. A class is an instance of the data type that the class have
4. An object is an instance of the data type of the class

✅ Correct Answer: 2

Which of the following is correct about new and malloc?

1. Both are available in C
2. Pointer object initialization of a class with both new and malloc calls the constructor of that class
3. Pointer object initialization of a class using new involves constructor call whereas using malloc does not involve constructor call
4. Pointer object initialization of a class using malloc involves constructor call whereas using new does not involve constructor call

✅ Correct Answer: 3

What is virtual inheritance?

1. C++ technique to avoid multiple copies of the base class into children/derived class
2. C++ technique to avoid multiple inheritances of classes
3. C++ technique to enhance multiple inheritance
4. C++ technique to ensure that a private member of the base class can be accessed somehow

✅ Correct Answer: 1

What is the difference between delete and delete[] in C++?

1. delete is used to delete normal objects whereas delete[] is used to pointer objects
2. delete is a keyword whereas delete[] is an identifier
3. delete is used to delete single object whereas delete[] is used to multiple(array/pointer of) objects
4. delete is syntactically correct but delete[] is wrong and hence will give an error if used in any case

✅ Correct Answer: 3

What is the correct syntax of declaring array of pointers of integers of size 10 in C++?

1. int arr = new int[10];
2. int **arr = new int*[10];
3. int *arr = new int[10];
4. int *arr = new int*[10];

✅ Correct Answer: 2

Which of the following type is provided by C++ but not C?

1. int
2. bool
3. float
4. double

✅ Correct Answer: 2

Which of the following feature is not provided by C?

1. Pointers
2. Structures
3. References
4. Functions

✅ Correct Answer: 3

Which of the following is not a fundamental type is not present in C but present in C++?

1. int
2. float
3. bool
4. void

✅ Correct Answer: 3

What is the size of a boolean variable in C++?

1. 1 bit
2. 1 byte
3. 4 bytes
4. 2 bytes

✅ Correct Answer: 1

Which of the following is C++ equivalent for scanf()?

1. cin
2. cout
3. print
4. input

✅ Correct Answer: 1

Which of the following is C++ equivalent for printf()?

1. cin
2. cout
3. print
4. input

✅ Correct Answer: 2

Which of the following is the correct difference between cin and scanf()?

1. both are the same
2. cin is a stream object whereas scanf() is a function
3. scanf() is a stream object whereas cin is a function
4. cin is used for printing whereas scanf() is used for reading input

✅ Correct Answer: 2

Which of the following is an exit-controlled loop?

1. for
2. while
3. do-while
4. all of the mentioned

✅ Correct Answer: 3

Which of the following is an entry-controlled loop?

1. for
2. while
3. do-while
4. both while and for

✅ Correct Answer: 2

In which part of the for loop termination condition is checked? for(I;II;III) {IV}

1. I
2. II
3. III
4. IV

✅ Correct Answer: 2

What is dynamic binding?

1. The process of linking the actual code with a procedural call during run-time
2. The process of linking the actual code with a procedural call during compile-time
3. The process of linking the actual code with a procedural call at any-time
4. All of the mentioned

✅ Correct Answer: 1

What is static binding?

1. The process of linking the actual code with a procedural call during run-time
2. The process of linking the actual code with a procedural call during compile-time
3. The process of linking the actual code with a procedural call at any-time
4. All of the mentioned

✅ Correct Answer: 2

What is name mangling in C++?

1. The process of adding more information to a function name so that it can be distinguished from other functions by the compiler
2. The process of making common names for all the function of C++ program for better use
3. The process of changing the names of variable
4. The process of declaring variables of different types

✅ Correct Answer: 1

Which of the following syntax for declaring a variable of struct STRUCT can be used in both C and C++?

1. struct STRUCT S;
2. STRUCT S;
3. Both struct STRUCT S; and STRUCT S;
4. Both C and C++ have different syntax

✅ Correct Answer: 1

What if we define the below structure in C and C++?

1. Error in C but not in C++
2. Error in C++ but not in C
3. No error in both C and C++
4. Error in both C and C++

✅ Correct Answer: 1

Which of the following is the scope resolution operator?

1. .
2. *
3. ::
4. ~

✅ Correct Answer: 3

Which of the following operator has left to right associativity?

1. Unary operator
2. Logical not
3. Array element access
4. addressof

✅ Correct Answer: 3

Which of the following is accessed by a member function of a class?

1. The object of that class
2. All members of a class
3. The public part of a class
4. The private part of a class

✅ Correct Answer: 2

What is the size of a character literal in C and C++?

1. 4 and 1
2. 1 and 4
3. 1 and 1
4. 4 and 4

✅ Correct Answer: 1

What is the size of a character type in C and C++?

1. 4 and 1
2. 1 and 4
3. 1 and 1
4. 4 and 4

✅ Correct Answer: 3

Which of the following is correct?

1. struct tag is required in both C and C++ while declaring an object of the structure
2. struct is not required in C but required in C++ while declaring an object of the structure
3. struct is not required in C++ but required in C while declaring an object of the structure
4. struct tag is not required in both C and C++ while declaring an object of the structure

✅ Correct Answer: 3

Which of the following is correct?

1. struct cannot have member function in C but it can in C++
2. struct cannot have member function in C++ but it can in C
3. struct cannot have member function in both C and C++
4. struct can have member function in both C and C++

✅ Correct Answer: 1

Which of the following statement is correct?

1. Structure in C allows Constructor definition
2. Structure in C++ allows Constructor definition
3. Both allow Constructor definition
4. C allows constructor definition while C++ does not

✅ Correct Answer: 2

Which of the following is correct about this pointer in C++?

1. this pointer is passed as a hidden argument in all the functions of a class
2. this pointer is passed as a hidden argument in all non-static functions of a class
3. this pointer is passed as a hidden argument in all static functions of a class
4. this pointer is passed as a hidden argument in all static variables of a class

✅ Correct Answer: 2

Which of the following operator is used with this pointer to access members of a class?

1. .
2. !
3. ->
4. ~

✅ Correct Answer: 3

Why this pointer is used?

1. To access the members of a class which have the same name as local variables in that scope
2. To access all the data stored under that class
3. To access objects of other class
4. To access objects of other variables

✅ Correct Answer: 1

What is the other name of compile-time polymorphism?

1. Static polymorphism
2. Dynamic polymorphism
3. Executing polymorphism
4. Non-executing polymorphism

✅ Correct Answer: 1

What is the other name of run-time polymorphism?

1. Static polymorphism
2. Dynamic polymorphism
3. Executing polymorphism
4. Non-executing polymorphism

✅ Correct Answer: 2

Which of the following is correct about static polymorphism?

1. In static polymorphism, the conflict between the function call is resolved during the compile time
2. In static polymorphism, the conflict between the function call is resolved during the run time
3. In static polymorphism, the conflict between the function call is never resolved during the execution of a program
4. In static polymorphism, the conflict between the function call is resolved only if it required

✅ Correct Answer: 1

Which of the following is correct about dynamic polymorphism?

1. In dynamic polymorphism, the conflict between the function call is resolved during the compile time
2. In dynamic polymorphism, the conflict between the function call is resolved during the run time
3. In dynamic polymorphism, the conflict between the function call is never resolved during the execution of the program
4. In dynamic polymorphism, the conflict between the function call is resolved at the beginning of the program

✅ Correct Answer: 2

What is std in C++?

1. std is a standard class in C++
2. std is a standard namespace in C++
3. std is a standard header file in C++
4. std is a standard file reading header in C++

✅ Correct Answer: 2

Which of the following syntax can be used to use a member of a namespace without including that namespace?

1. namespace::member
2. namespace->member
3. namespace.member
4. namespace~member

✅ Correct Answer: 1

What is the size of wchar_t in C++?

1. 2
2. 4
3. 2 or 4
4. Based on the number of bits in the system

✅ Correct Answer: 4

Pick the odd one out.

1. array type
2. character type
3. boolean type
4. integer type

✅ Correct Answer: 1

Which data type is used to represent the absence of parameters?

1. int
2. short
3. void
4. float

✅ Correct Answer: 3

What does ‘\a’ escape code represent?

1. alert
2. backslash
3. tab
4. form feed

✅ Correct Answer: 1

Which type is best suited to represent the logical values?

1. integer
2. boolean
3. character
4. float

✅ Correct Answer: 2

Identify the user-defined types from the following?

1. enumeration
2. classes
3. both enumeration and classes
4. int

✅ Correct Answer: 3

The value 132.54 can be represented using which data type?

1. double
2. void
3. int
4. bool

✅ Correct Answer: 1

When a language has the capability to produce new data type mean, it can be called as

1. overloaded
2. extensible
3. encapsulated
4. reprehensible

✅ Correct Answer: 2

Pick the odd one out.

1. integer, character, boolean, floating
2. enumeration, classes
3. integer, enum, void
4. arrays, pointer, classes

✅ Correct Answer: 3

Is bool a fundamental data type in C++?

1. Yes
2. No, it is a typedef of unsigned char
3. No, it is an enum of {false, true}
4. No, it is expanded from macros

✅ Correct Answer: 1

Find the odd one out.

1. std::vector<int>
2. std::vector<short>
3. std::vector<long>
4. std::vector<bool>

✅ Correct Answer: 4

What happens when a null pointer is converted into bool?

1. an error is flagged
2. bool value evaluates to true
3. bool value evaluates to false
4. the statement is ignored

✅ Correct Answer: 3

What is the value of the bool? bool is_int(789.54)

1. TRUE
2. FALSE
3. 1
4. 2

✅ Correct Answer: 2

What happens when a null pointer is converted into bool?

1. an error is flagged
2. bool value evaluates to true
3. bool value evaluates to false
4. the statement is ignored

✅ Correct Answer: 3