c++interviewquestions.pdf
免费下载
C++ Interview Questions
Compiled by Dr. Fatih Kocan, Wael Kdouh, and Kathryn Patterson
for the Data Structures in C++ course(CSE 3358)
Spring 2008
Q: Is it possible to have Virtual Constructor? If yes, how? If not, Why not possible?
A: There is nothing like Virtual Constructor. The Constructor can’t be virtual as the constructor
is a code which is responsible for creating an instance of a class and it can’t be delegated to
any other object by virtual keyword means.
Q: What is constructor or ctor?
A: Constructor creates an object and initializes it. It also creates vtable for virtual functions. It is
different from other methods in a class.
Q: What about Virtual Destructor?
A: Yes there is a Virtual Destructor. A destructor can be virtual as it is possible as at runtime
depending on the type of object caller is calling to, proper destructor will be called.
Q: What is the difference between a copy constructor and an overloaded assignment operator?
A: A copy constructor constructs a new object by using the content of the argument object. An
overloaded assignment operator assigns the contents of an existing object to another existing
object of the same class.
Q: Can a constructor throws an exception? How to handle the error when the constructor fails?
A:The constructor never throws an error.
Q: What is default constructor?
A: Constructor with no arguments or all the arguments has default values.
Q: What is copy constructor?
A: Constructor which initializes the it's object member variables ( by
shallow copying) with another object of the same class. If you don't implement one in your class
then compiler implements one for you. for example:
(a) Boo Obj1(10); // calling Boo constructor
(b) Boo Obj2(Obj1); // calling boo copy constructor
(c) Boo Obj2 = Obj1;// calling boo copy constructor
Q: When are copy constructors called?
A: Copy constructors are called in following cases:
(a) when a function returns an object of that
class by value
(b) when the object of that class is passed by
value as an argument to a function
(c) when you construct an object based on another
object of the same class
(d) When compiler generates a temporary object
of 97
免费下载
【版权声明】本文为墨天轮用户原创内容，转载时必须标注文档的来源（墨天轮），文档链接，文档作者等基本信息，否则作者和墨天轮有权追究责任。如果您发现墨天轮中有涉嫌抄袭或者侵权的内容，欢迎发送邮件至：contact@modb.pro进行举报，并提供相关证据，一经查实，墨天轮将立刻删除相关内容。
下载排行榜
1
2
9-数据库人的进阶之路：从PG分区、SQL优化到拥抱AI未来（罗敏）.pptx
3
1-PG版本兼容性案例（彭冲）.pptx
4
2-TDSQL PG在复杂查询场景中的挑战与实践-opensource.pdf
5
6-PostgreSQL 哈希索引原理浅析（文一）.pdf
6
8-基于PG向量和RAG技术的开源知识库问答系统MaxKB.pptx
7
3-AI时代的变革者-面向机器的接口语言(MOQL)_吕海波.pptx
8
4-IvorySQL V4：双解析器架构下的兼容性创新实践.pptx
9
7-拉起PG好伙伴DifySupaOdoo.pdf
10
《云原生安全攻防启示录》李帅臻.pdf
相关文档
评论