QMetry Interview Questions, Process, and Tips

Prepare basic like core java , spring boot and MySQL.

Q1. What is hashcode method does?
Ans. 
The hashcode method in Java returns the hash code value for an object.
• Returns an integer value representing the object's memory address

• Used for efficient storage and retrieval in hash-based collections like HashMap

• Should be overridden in custom classes to ensure proper functionality
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Q2. What is internal workingd of Hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.
• HashMap uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine its index in the array.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• To retrieve a value, the key is hashed again to find the correct index and then the l...read more
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Q3. What is method overriding and overloading
Ans. 
Method overriding is when a subclass provides a specific implementation of a method that is already provided by its parent class. Method overloading is when multiple methods have the same name but different parameters.
• Method overriding is used for runtime polymorphism.

• Method overloading is used for compile-time polymorphism.

• Example of method overriding: public class Animal { public void sound() { System.out...read more
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Q1. - Java core concepts like hashcode & equals - Internal working of hashmap - Java stream API with live example for fetching list of employees based on emp name starts with something. Coding question to fin...read more
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Q1. LinkedList vs ArrayList Comparator in java Explain the logic for creating a utility to validate XML.(You can explain how you can use Stack to write the logic) Provide a HLD for a URL shortner
Ans. 
Comparison between LinkedList and ArrayList, explanation of Comparator in Java, logic for XML validation using Stack, and HLD for URL shortener.
• LinkedList is a doubly linked list while ArrayList is a resizable array

• LinkedList is efficient for frequent insertions and deletions, while ArrayList is efficient for random access

• Comparator interface in Java is used to define custom sorting logic for objects

• XML validation can ...read more
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Q1. Normal Discussion about company and environment and expectations
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Q1. Focus on core java , Like string , and java collections , and spring , spring boot
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Two coding questions, related to Arrays and String java
1 was find second largest number in array without sorting
2. Permutation of string

Q1. Basic questions, what you have done previous project
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Q2. Tell me about yourself
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Q3. What is last project
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