HCLTech Software Engineer Interview Questions, Process, and Tips

Q1. As per your resume
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Q1. As per resume +sql
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Aptitude test and personality tests can be used in determining skills and personality test abilities to highlights on resume or explaining cover letter when you applying
HR: human resource HR personals learn more about a prospective employee strength and weakness career assessment test may also be used with in a company to make promotion decision.

Ct: a coding tests or programming language tests is the abilities to check on coder on the job potential and performance in the real world.

GD: GD assessment the overall personality thoughts feelings and behaviour of an individual in a group discussion topic presented to the group members for discussion.

Technical: a technical a definition is in technical communication descriping or explaining technicals terminology used.

An aptitude test usually consists of such measuring verbal ability, numerical ability, spatial ability, mechanical ability, logical reasoning ability and clerical speed and accuracy.

Coding test: units testing is a software is a development process in the...mannual testing of coding is important after automated testing is completed.

Technical test: Technical job skills knowledge referred to the talent person
expertise a person possesses to a certain job or task.

Case study: case study can be defined as an intensive study about a group of people or a unit which is aimed to generalized over several units.

In aptitude test it will provide a 4 modules I.e.,logical reasoning,verbal ability,data interpretation, numerical questions

In coding test,as we all of know coding is critical to all of us. They will give maximum 2coding questions within limit of we can solve it

In group discussion,they will check out communication skills for that purpose only GD will conducted and they also check the leadership qualities. If communicate is good they will select us.

Q1. Explain Basic of OOP pillers
Ans. 
The four pillars of OOP are encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods together in a class to hide implementation details.

• Inheritance: Creating new classes from existing ones, inheriting their properties and behaviors.

• Polymorphism: The ability of objects of different classes to respond to the same method call.

• Abstraction: Simplifying complex systems by breaking th
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Q2. What's run time polymorphism
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Run time polymorphism is the ability of an object to take on multiple forms at runtime.
• It allows objects of different classes to be treated as if they belong to a single class hierarchy.

• It is achieved through method overriding and dynamic binding.

• Example: Animal class with subclasses Dog and Cat. A method speak() is overridden in both subclasses.

• At runtime, an object of type Animal can refer to either a Dog or a Cat ob
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Q3. Explain more about abstraction what are access modifiers
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Abstraction is the process of hiding implementation details while showing only the necessary information.
• Abstraction helps in reducing complexity and increasing efficiency.

• It allows us to focus on what an object does instead of how it does it.

• For example, a car's driver only needs to know how to drive it, not how the engine works.

• Access modifiers are keywords in object-oriented programming that determine the accessibil...read more
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Q4. Problem about virtual function and explain it with vtable and vptr how it will work how it will work when child is pointing to base class
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Explaining virtual function problem with vtable and vptr
• Virtual functions allow polymorphism by allowing child classes to override base class functions

• Vtable is a table of function pointers that maps virtual functions to their implementations

• Vptr is a pointer to the vtable of an object

• When a child class object is pointing to a base class object, the vptr points to the base class vtable

• This can cause issues if the child...read more
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Q5. Difference in ordered and unordered map
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Ordered map maintains the order of insertion while unordered map does not.
• Ordered map is implemented as a balanced tree while unordered map is implemented as a hash table.

• Ordered map has slower insertion and deletion but faster searching compared to unordered map.

• Unordered map has faster insertion and deletion but slower searching compared to ordered map.

• Example: std::map vs std::unordered_map in C++.
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Q6. What's copy constructor why it is needed to pass by reference
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Copy constructor creates a new object by copying an existing object.
• Copy constructor is used to create a new object with the same values as an existing object.

• It is needed to pass by reference to avoid creating a copy of the object, which can be expensive.

• Passing by reference allows the new object to share the same memory as the original object.

• Copy constructor is automatically called when a new object is created from
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Q7. Questions based on resume projects
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Q8. Implement stack using array in C++ write code
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Implement stack using array in C++
• Declare an array and a variable to keep track of top element

• Push element by incrementing top and assigning value to array[top]

• Pop element by returning array[top] and decrementing top

• Check for overflow and underflow conditions
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