MCQOPTIONS

Explore topic-wise MCQs in Career Aptitude Test.

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Career Aptitude Test knowledge and support exam preparation. Choose a topic below to get started.

1.	Why is user defined copy constructor required?
A.	there is no implicit copy constructor in C++
B.	when pointers are involved implicit copy constructor does not give correct result
C.	both a and b
D.	none
Answer» C. both a and b

2.	Which Java.Lang contains only static methods?
A.	Math ,System
B.	Number,Exception
C.	There is no such class
D.	none
Answer» B. Number,Exception

3.	Virtual keyword is used
A.	to remove static linkages
B.	to call function based on kind of object it is being called for
C.	to call the methods that don't exist at compile time
D.	all the above
Answer» E.

4.	Use of preprocessor directive in OOP
A.	for conditional compilation
B.	for macro expansion
C.	error and warning reporting
D.	all the above
Answer» E.

5.	The keyword 'this' is used
A.	As reference to current object
B.	Explicit constructor invocation
C.	In open recursion
D.	All the above
Answer» E.

6.	Pure virtual function is used
A.	to give meaning to derived class function
B.	to give meaning to base class function
C.	to initialize all functions
D.	None
Answer» C. to initialize all functions

7.	Overloaded methods in java
A.	Compiler uses method signature to determine which method to invoke. They may have different functionality
B.	They are not available in fundamental classes
C.	They have the same name and signature
D.	none
Answer» B. They are not available in fundamental classes

8.	Invoking methods characteristics
A.	methods can be invoked in any order and calling method should be in same class as worker method
B.	Worker method and calling method can be invoked in same way
C.	Any method can call any method
D.	all the above
Answer» B. Worker method and calling method can be invoked in same way

9.	Function templates are considered equivalent when
A.	Declared in same scope
B.	Having same name
C.	Having identical return type and parameter list
D.	All of the above
Answer» E.

10.	Function Templates can have
A.	Explicit instantiation definition with template argument for all parameters
B.	explicit instantiation of declaration with template argument for all parameters
C.	Both a and b
D.	None
Answer» D. None

11.	Fallthrough in a switch case statement
A.	prevents the next case after the matching block to be executed
B.	Allows the next case after the matching block to be executed
C.	no fallthorugh occurs in switch case
D.	none
Answer» C. no fallthorugh occurs in switch case

12.	Encapsulation helps
A.	information hiding
B.	in providing low coupling
C.	in providing high cohesion
D.	All the above
Answer» E.

13.	Dynamic dispatch is a feature that
A.	selects which polymorphic operation to call at run time
B.	selects which polymorphic operation to call at compile time
C.	Both a and b
D.	None
Answer» B. selects which polymorphic operation to call at compile time

14.	Constructor chaining is
A.	subclass constructor calling super class constructor
B.	super class constructor calling subclass constructor
C.	both
D.	none
Answer» B. super class constructor calling subclass constructor

15.	Break statement in switch case
A.	prevents from fallthrough
B.	causes an exit from innermost loop
C.	both a and b
D.	none
Answer» D. none

16.	An Abstract class
A.	allows normal method declaration within
B.	can be instantiated
C.	Must have abstract methods with implemetation within
D.	none
Answer» B. can be instantiated

17.	Abstract class vs Interface
A.	A class may inherit only one abstract class but may inherit several interfaces.
B.	An abstract class can provide complete and default code but an interface has no code
C.	both a and b
D.	none
Answer» D. none

18.	A copy constructor is called
A.	when an object is returned by value
B.	when an object is passed by value as an argument
C.	when compiler generates a temporary object
D.	all the above
Answer» E.