AFour Technologies Interview Questions, Process, and Tips

Q1. Difference between comparable and comparator
Ans. 
Comparable is an interface used for natural ordering while Comparator is an interface used for custom ordering.
• Comparable is implemented by the class whose objects need to be sorted

• Comparator is implemented separately and passed as an argument to sorting method

• Comparable uses compareTo() method for comparison while Comparator uses compare() method

• Comparable provides only one way of sorting while Comparator provides mul...read more
Answered by AI
Add your answer

Q1. Internal working of hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to retrieve values quickly.
• HashMap uses an array of buckets to store key-value pairs

• Each bucket contains a linked list of entries

• Hashing is used to determine the index of the bucket where the entry should be stored

• If two keys have the same hashcode, they are stored in the same bucket as a linked list

• HashMap allows null keys and values

• HashMap is no...read more
Answered by AI
Add your answer

Q1. What is your expectation about salary
Add your answer

There were 4 questions. 1st one was based on array index based optimisation. The second one was on oops and the last 2 were on algo and DS type. Time given was 45 mins.

Q1. Questions based on previous work.
Add your answer

One coding questions on Array and string

Q1. They will ask about the program which will solve in coding part and tell optimize it or make changes in it and ask about dsa and personal project
Add your answer

Q1. What your expected ctc?
Ans. 
My expected CTC is in line with industry standards and commensurate with my experience and skills.
• My expected CTC is based on my experience and skills in the field of QA engineering.

• I have researched industry standards and have a realistic expectation for my salary.

• I am open to negotiation based on the specific job requirements and benefits package.

• I am looking for a fair and competitive salary that reflects my contrib
Answered by AI
Add your answer

Q1. Do you aware of method overiding?
Ans. 
Method overriding is a feature in object-oriented programming where a subclass provides its own implementation of a method that is already provided by its parent class.
• Method overriding is used to achieve runtime polymorphism.

• The method signature of the overridden method must be the same as the method in the parent class.

• The access level of the overriding method cannot be more restrictive than the overridden method.

• Exa...read more
Answered by AI
Add your answer
Q2. Lets explain thw oops concept?
Ans. 
OOPs is a programming paradigm based on the concept of objects that interact with each other.
• OOPs stands for Object-Oriented Programming.

• It focuses on creating objects that have properties and methods.

• Encapsulation, Inheritance, and Polymorphism are the three main pillars of OOPs.

• Encapsulation is the process of hiding the implementation details of an object from the outside world.

• Inheritance allows a class to inherit p...read more
Answered by AI
Add your answer

1 Code Of Medium Type Based On String Operations

Q1. Technical Round With QA Session Along With Explanation Of How You Made The 1St Round Of Codeing
Add your answer

Q1. HR Rounds General Discussions
Add your answer
Q2. Normal Discussion Related To Norms Salary Structure And All
Add your answer