QBurst Technologies Interview Questions, Process, and Tips

Q1. Memory leak in Android?
Ans. 
Memory leak in Android refers to a situation where an application uses memory inefficiently, causing unused memory to accumulate and not be released.
• Memory leaks can occur when objects are not properly released after use, leading to a buildup of unused memory.

• Common causes of memory leaks in Android include holding onto references to objects that are no longer needed, using static variables in a way that prevents them ...read more
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Q2. Garbage collection basics.
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Q3. Pass data between fragments in Android
Ans. 
Use ViewModel to share data between fragments in Android
• Create a ViewModel class to hold the data to be shared

• Observe the ViewModel in each fragment to receive updates

• Use LiveData to ensure data is updated in real-time
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Q1. Implement a Hash Map
Ans. 
A Hash Map is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
• Use an array to store the key-value pairs

• Implement a hash function to map keys to indices in the array

• Handle collisions by using techniques like chaining or open addressing
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Q2. Activity lifecycle in Android
Ans. 
Activity lifecycle in Android refers to the different states an activity goes through during its lifetime.
• There are several states in the activity lifecycle, including onCreate, onStart, onResume, onPause, onStop, and onDestroy.

• Activities can transition between these states based on user interactions or system events.

• Understanding the activity lifecycle is crucial for managing resources and maintaining a smooth user ex...read more
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A basic coding round that can be conducted in any programming language.

Q1. What is the implementation and explanation of the coding question that was asked in the first round?
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Q1. Why stream api in Java?
Ans. 
Stream API in Java provides a functional approach to processing collections of objects.
• Allows for concise and readable code by using functional programming concepts like map, filter, and reduce.

• Enables parallel processing of data, improving performance for large datasets.

• Supports lazy evaluation, allowing for efficient use of resources.

• Example: List names = Arrays.asList("Alice", "Bob", "Charlie"); names.stream().filte...read more
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Q2. Java code to filter even numbers from a list and store the square of those in another list
Ans. 
Java code to filter even numbers from a list and store the square of those in another list
• Create two ArrayLists to store the original list and the squared even numbers list

• Iterate through the original list and check if each number is even

• If the number is even, square it and add it to the squared even numbers list
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Q3. Java code to check two strings are anagram
Ans. 
Java code to check if two strings are anagrams
• Create a function that takes in two strings as parameters

• Convert both strings to char arrays and sort them

• Compare the sorted char arrays to check if they are equal
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Q4. Need of functional interfaces in java
Ans. 
Functional interfaces in Java are needed to enable the use of lambda expressions, which provide a concise way to implement single abstract method interfaces.
• Functional interfaces have exactly one abstract method and can have multiple default or static methods.

• They are used to enable the use of lambda expressions, which provide a concise way to implement the single abstract method.

• Examples of functional interfaces in Ja...read more
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Q5. How threads can be created in java
Ans. 
Threads in Java can be created by extending the Thread class or implementing the Runnable interface.
• Extend the Thread class and override the run() method

• Implement the Runnable interface and implement the run() method

• Use the Executor framework for managing threads
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Q1. Japanese introduction
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Q2. Job related questions
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Coding round first round

Q1. String concepts
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Q2. Array methods in js
Ans. 
Array methods in JavaScript are built-in functions that allow manipulation and traversal of arrays.
• Some common array methods include: map(), filter(), reduce(), forEach(), and find().

• map() - creates a new array by applying a function to each element in the original array.

• filter() - creates a new array with elements that pass a certain condition.

• reduce() - applies a function against an accumulator and each element in th...read more
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Swap number, sql queries

Q1. Multiple interviewers multiplication questions
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Q1. Day to day activities
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Q2. Questions based on azure in day to day activities
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