Explore topic-wise MCQs in Technical Programming.

This section includes 916 Mcqs, each offering curated multiple-choice questions to sharpen your Technical Programming knowledge and support exam preparation. Choose a topic below to get started.

551.

Can typeid() function be used with the object of generic classes?

A. Yes, only if default type is given
B. Yes, always
C. No, generic data can’t be determined
D. No, never possible
Answer» C. No, generic data can’t be determined
Discussion
552.

What are the two specializations of I/O template classes in C++?

A. 16-bit character and wide characters
B. 8-bit character and wide characters
C. 32-bit character and locale characters
D. 64-bit characters and locale characters
Answer» C. 32-bit character and locale characters
Discussion
553.

A template class defines the form of a class _____________________ it will operate.

A. With full specification of the data on which
B. With full specification of the functions on which
C. Without full specification of the data on which
D. Without full specification of the functions on which
Answer» D. Without full specification of the functions on which
Discussion
554.

Which is the most significant feature that arises by using template classes?

A. Code readability
B. Ease in coding
C. Code reusability
D. Modularity in code
Answer» D. Modularity in code
Discussion
555.

What is the syntax to use explicit class specialization?

A. template class myClass<>{ }
B. template class myClass{ }
C. template <> class myClass<>{ }
D. template <> class myClass{ }
Answer» E.
Discussion
556.

Can default arguments be used with the template class?

A. Yes, in some special cases
B. Yes, always
C. No, it must satisfy some specific conditions first
D. No, it can’t be done
Answer» C. No, it must satisfy some specific conditions first
Discussion
557.

Which among the following is the proper syntax for the template class?

A. template ;
B. Template ;
C. template T named(T x, T y){ }
D. Template T1 named(T1 x, T2 y){ }
Answer» D. Template T1 named(T1 x, T2 y){ }
Discussion
558.

A template class can have _____________

A. More than one generic data type
B. Only one generic data type
C. At most two data types
D. Only generic type of integers and not characters
Answer» B. Only one generic data type
Discussion
559.

Is it necessary that all the abstract methods must be defined from an abstract class?

A. Yes, depending on code
B. Yes, always
C. No, never
D. No, if function is not used, no definition is required
Answer» C. No, never
Discussion
560.

How many abstract classes can a single program contain?

A. At most 1
B. At least 1
C. At most 127
D. As many as required
Answer» E.
Discussion
561.

It is _________________________ to have an abstract method.

A. Not mandatory for an static class
B. Not mandatory for a derived class
C. Not mandatory for an abstract class
D. Not mandatory for parent class
Answer» D. Not mandatory for parent class
Discussion
562.

Can abstract classes have static methods (Java)?

A. Yes, always
B. Yes, but depends on code
C. No, never
D. No, static members can’t have different values
Answer» B. Yes, but depends on code
Discussion
563.

Abstract class can’t be final in java.

A. True
B. False
Answer» B. False
Discussion
564.

The abstract classes in java can _________________

A. Implement constructors
B. Can’t implement constructor
C. Can implement only unimplemented methods
D. Can’t implement any type of constructor
Answer» B. Can’t implement constructor
Discussion
565.

Use of pointers or reference to an abstract class gives rise to which among the following feature?

A. Static Polymorphism
B. Runtime polymorphism
C. Compile time Polymorphism
D. Polymorphism within methods
Answer» C. Compile time Polymorphism
Discussion
566.

Which among the following is an important use of abstract classes?

A. Header files
B. Class Libraries
C. Class Libraries
D. Class inheritance
Answer» C. Class Libraries
Discussion
567.

We ___________________ to an abstract class.

A. Can create pointers
B. Can create references
C. Can create pointers or references
D. Can’t create any reference, pointer or instance
Answer» D. Can’t create any reference, pointer or instance
Discussion
568.

Abstract classes can ____________________ instances.

A. Never have
B. Always have
C. Have array of
D. Have pointer of
Answer» B. Always have
Discussion
569.

Abstract class A has 4 virtual functions. Abstract class B defines only 2 of those member functions as it extends class A. Class C extends class B and implements the other two member functions of class A. Choose the correct option below.

A. Program won’t run as all the methods are not defined by B
B. Program won’t run as C is not inheriting A directly
C. Program won’t run as multiple inheritance is used
D. Program runs correctly
Answer» E.
Discussion
570.

If a class is extending/inheriting another abstract class having abstract method, then _______________________

A. Either implementation of method or making class abstract is mandatory
B. Implementation of the method in derived class is mandatory
C. Making the derived class also abstract is mandatory
D. It’s not mandatory to implement the abstract method of parent class
Answer» B. Implementation of the method in derived class is mandatory
Discussion
571.

If there is an abstract method in a class then, ________________

A. Class must be abstract class
B. Class may or may not be abstract class
C. Class is generic
D. Class must be public
Answer» B. Class may or may not be abstract class
Discussion
572.

Can abstract class have main() function defined inside it?

A. Yes, depending on return type of main()
B. Yes, always
C. No, main must not be defined inside abstract class
D. No, because main() is not abstract function
Answer» C. No, main must not be defined inside abstract class
Discussion
573.

Which among the following best describes abstract classes?

A. If a class has more than one virtual function, it’s abstract class
B. If a class have only one pure virtual function, it’s abstract class
C. If a class has at least one pure virtual function, it’s abstract class
D. If a class has all the pure virtual functions only, then it’s abstract class
Answer» D. If a class has all the pure virtual functions only, then it’s abstract class
Discussion
574.

If same object name is given to different objects of different class then _____________

A. Its compile time error
B. Its runtime error
C. It’s not an error
D. Program suns smooth
Answer» B. Its runtime error
Discussion
575.

A single object can be used __________________

A. As only two class types at a time
B. As only three class types at a time
C. As only one class type at a time
D. As of as many class types as required
Answer» D. As of as many class types as required
Discussion
576.

Which object can be used to access the standard input?

A. System.inner
B. cin
C. System.stdin
D. console.input
Answer» C. System.stdin
Discussion
577.

Which among the following is not a use of object?

A. Defining a member function
B. Accessing data members
C. Creating instance of a class
D. Using class members
Answer» B. Accessing data members
Discussion
578.

Objects can be used _____________________

A. To access any member of a class
B. To access only public members of a class
C. To access only protected members of a class
D. To access only private members of a class
Answer» C. To access only protected members of a class
Discussion
579.

An object can be used to represent _______________

A. A real world entity
B. A real function
C. Some real data only
D. Some function only
Answer» B. A real function
Discussion
580.

Objects type ____________________

A. Can be changed in runtime
B. Can’t be changed in runtime
C. Can be changed in compile time
D. May or may not get changed
Answer» C. Can be changed in compile time
Discussion
581.

Object cout and cin _________________

A. Can be used directly with << and >> symbols respectively
B. Can be used directly with >> and << symbols respectively
C. Must be used as a function which accepts 2 arguments
D. Must be used as a function which accepts 3 arguments
Answer» B. Can be used directly with >> and << symbols respectively
Discussion
582.

What are singleton objects?

A. The only two objects of a class throughout the program
B. The only object of a class throughout the program
C. The only object of a class throughout the program
D. The objects that are created and then deleted without use
Answer» C. The only object of a class throughout the program
Discussion
583.

A factory object is used ______________________

A. To create new classes
B. To create new function
C. To create new data members
D. To create new objects
Answer» E.
Discussion
584.

Which object can be used to contain other objects?

A. First class object
B. Derived class object
C. Container object
D. Enclosure object
Answer» D. Enclosure object
Discussion
585.

Immutable object are used ______________________

A. To set up as a fixed state
B. To set up variable object
C. To set up an object of abstract class
D. To set up an object of derived class
Answer» B. To set up variable object
Discussion
586.

What is function object?

A. An object with a single function
B. An object with only functions
C. An object with more than one function
D. An object with no functions
Answer» B. An object with only functions
Discussion
587.

Which among the following is not a property of an object?

A. Identity
B. Properties
C. Attributes
D. Names
Answer» E.
Discussion
588.

Which among the following is main use of object?

A. To create instance of a function
B. To create instance of a program
C. To create instance of class
D. To create instance of structures
Answer» D. To create instance of structures
Discussion
589.

Is an array of characters always a string?

A. Yes, always
B. Yes, if each character is terminated by null
C. No, since each character is terminated by null
D. No, never
Answer» E.
Discussion
590.

Two dimensional array can’t be initialized with the declaration.

A. True
B. False
Answer» C.
Discussion
591.

From which index does the array of objects start?

A. 0
B. 1
C. 2
D. 3
Answer» B. 1
Discussion
592.

Can we have two dimensional object array?

A. Yes, always
B. Yes, only if primitive type array
C. No, since two indices are impossible
D. No, never
Answer» B. Yes, only if primitive type array
Discussion
593.

If an array of objects is of size 10 and a data value have to be retrieved from 5th object then ________________ syntax should be used.

A. Array_Name[4].data_variable_name;
B. Data_Type Array_Name[4].data_variable_name;
C. Array_Name[4].data_variable_name.value;
D. Array_Name[4].data_variable_name(value);
Answer» B. Data_Type Array_Name[4].data_variable_name;
Discussion
594.

The Object array is created in _____________________

A. Heap memory
B. Stack memory
C. HDD
D. ROM
Answer» B. Stack memory
Discussion
595.

The objects in an object array _______________________

A. Can be created without use of constructor
B. Can be created without calling default constructor
C. Can’t be created with use of constructor
D. Can’t be created without calling default constructor
Answer» C. Can’t be created with use of constructor
Discussion
596.

How the objects of array can be denoted?

A. Indices
B. Name
C. Random numbers
D. Alphabets
Answer» B. Name
Discussion
597.

If constructor arguments are passed to objects of array then ____________ if the constructors are overloaded.

A. It is mandatory to pass same number of arguments to all the objects
B. It is mandatory to pass same type of arguments to all the objects
C. It is not mandatory to call same constructor for all the objects
D. It is mandatory to call same constructor for all the constructors
Answer» D. It is mandatory to call same constructor for all the constructors
Discussion
598.

When are the array of objects without any initialization useful?

A. When object data is not required just after the declaration
B. When initialization of object data is to be made by the compiler
C. When object data doesn’t matter in the program
D. When the object should contain garbage data
Answer» B. When initialization of object data is to be made by the compiler
Discussion
599.

Which is the condition that must be followed if the array of objects is declared without initialization, only with size of array?

A. The class should have separate constructor for each object
B. The class must have no constructors
C. The class should not have any member function
D. The class must have a default or zero argument constructor
Answer» E.
Discussion
600.

If array of objects is declared as given below, which is the limitation on objects? Class_name arrayName[size];

A. The objects will have same values
B. The objects will not be initialized individually
C. The objects can never be initialized
D. The objects will have same data
Answer» C. The objects can never be initialized
Discussion