Akamai Technologies DevOps Site Reliability Engineer Interview Questions and Answers

Q1. Questions on Java8, Multithreading, Collections, Spring boot
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Q1. Tell me java8 features
Ans. 
Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to write code in a more concise way by replacing anonymous classes.

• Functional interfaces are interfaces with a single abstract method, which can be implemented using lambda expressions.

• Streams provide a way to work with sequences of elements and perform operations like fi...read more
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Q2. Find 2nd largest number in an array
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Iterate through array to find 2nd largest number
• Iterate through array and keep track of largest and second largest numbers

• Handle edge cases like duplicates and empty array

• Example: ['3', '5', '2', '7', '5'] should return 5 as the 2nd largest number
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Q1. Explain psvm in java
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psvm in Java stands for public static void main, which is the entry point for a Java program.
• psvm is the method signature for the main method in Java programs.

• It is used to start the execution of a Java program.

• It must be declared as public, static, and void.

• It takes an array of strings as an argument, which can be used to pass command line arguments.
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Q2. Explain collection
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A collection is a group of related objects or data items that are stored together.
• Collections can be implemented using data structures like arrays, lists, sets, maps, etc.

• Collections allow for easy manipulation and organization of data.

• Examples of collections include arrays of integers, lists of strings, sets of unique values, and maps of key-value pairs.
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Hackerrank test consitin of 2 DSA questions and 1 api development question

Q1. Reverse the linked list.
Ans. 
Reverse a linked list by changing the direction of pointers.
• Start with three pointers: current, previous, and next.

• Iterate through the linked list, updating pointers to reverse the direction.

• Return the new head of the reversed linked list.
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Q1. Internel working of Hashmap
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HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where it will be stored.

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

• Retrieving a value involves hashing the ...read more
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Q1. Salary Discussion
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