Unistal Systems Flutter Developer Interview Questions and Answers for Experienced

Easy problem on java

Q1. Technical discussion
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Logical reasoning And aptitude test

C++, python and Java programming

Q1. Threading: Write and use a mutex?
Ans. 
A mutex is a synchronization primitive that ensures only one thread can access a resource at a time.
• Create a mutex object using the appropriate library or language-specific function.

• Lock the mutex before accessing the shared resource to prevent other threads from accessing it.

• Unlock the mutex after finishing the operation on the shared resource to allow other threads to access it.

• Example: pthread_mutex_t mutex; pthread...read more
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Q2. Find the memory leak in a given set of code.
Ans. 
Identify memory leak in code
• Check for any dynamically allocated memory that is not being freed

• Look for any infinite loops or recursive functions that consume memory

• Use memory profiling tools like Valgrind to detect leaks

• Check for any global variables that are not properly managed
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Q1. Resume based questions
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Q2. Event loop in nodejs
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Event loop in Node.js manages asynchronous operations by executing callback functions when certain events occur.
• Event loop is responsible for handling I/O operations, timers, and callbacks in Node.js

• It allows Node.js to perform non-blocking operations efficiently

• Event loop continuously checks the event queue for new events to execute
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Q3. Javascript es6 questions
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Q1. Promises in javascript
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Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.
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Q1. Array related questions
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Q2. OOPS Concept like multithreading
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Some advanced linked list questions

The test was very weird one.
They did have planned anything for the test, They came and given a link on bit.ly and given an another link that is in google form for the answers.
And they selection of people for second round is not sensible.

This round was also be a weird.
They give each candidates with different questions.
They told us to write logic on the paper and you can use internet for your reference.
But after this round they announced the results but that is not in genuine one.