ACKO Software Engineer2 Interview Questions and Answers

75 min test with 18 Java theory questions

Q1. Synchronized keyword usage
Ans. 
The synchronized keyword in Java is used to control access to shared resources in a multithreaded environment.
• Synchronized keyword can be used to synchronize access to critical sections of code to prevent race conditions.

• It can be applied to methods or code blocks to ensure only one thread can access them at a time.

• Example: synchronized void myMethod() { // code }

• Example: synchronized(this) { // code }
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Q2. Message Queue types
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Q3. Thread Contention
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Q4. Java Profiling Tools
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Q5. Abstract classes
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Q1. Binary search algo quetion
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Q1. One leetcode easy-medium problem
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Q2. Java, springboot and oops question
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Q1. Project related questions
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Q2. System design questions
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Q1. Machine coding: Design in-memory document search
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Q1. HLD: Design a ad-click aggregation service
Ans. 
Design an ad-click aggregation service for tracking and analyzing ad clicks.
• Use a distributed system to handle high volume of ad click data

• Implement real-time processing for immediate insights on ad performance

• Utilize a database to store aggregated ad click data for reporting and analysis
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Q1. Basic DSA Question
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Q1. Mobile Development Related Questions
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Q1. Basic HR Questions
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Mcqs based on cs fundamentals and 2_3 coding questions

Q1. 2-3 DSA questions to be written on paper in the interview itself
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Q2. Merge 2 sorted Linked list into 1
Ans. 
Merge two sorted linked lists into one.
• Create a new linked list to store the merged list.

• Compare the values of the nodes from both lists and add the smaller value to the new list.

• Move the pointer of the list with the smaller value to the next node.

• Repeat the comparison and addition until one of the lists is empty.

• Add the remaining nodes from the non-empty list to the new list.

• Return the new merged list.
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Q1. A full cv analysis interview round discussion on all the projects and team work experience
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Q1. Explain Concurrency
Ans. 
Concurrency is the ability of a system to execute multiple tasks simultaneously.
• Concurrency allows multiple tasks to run concurrently, improving performance and efficiency.

• Concurrency can be achieved through multithreading or multiprocessing.

• Example: A web server handling multiple requests simultaneously using multithreading.
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Q2. Explain Acid principles
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ACID principles are a set of properties that guarantee database transactions are processed reliably.
• Atomicity: Transactions are all or nothing. If one part of the transaction fails, the entire transaction is rolled back.

• Consistency: Transactions bring the database from one valid state to another. All constraints are satisfied.

• Isolation: Transactions are isolated from each other until they are completed.

• Durability: Once...read more
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