EPAM Systems Software Engineer Interview Questions and Answers for Freshers

Count the number of words in a list of strings

• Iterate through the list of strings

• Split each string by spaces to get individual words

• Increment a counter for each word encountered

Execution context refers to the environment in which a piece of code is executed, including variables, scope, and this keyword.

• Execution context includes variables, scope chain, and the value of the this keyword.

• There are three types of execution contexts: global, function, and eval.

• Each function call creates a new execution context, which is pushed onto the call stack.

• Lexical environment and variable environment are part of the execution context.

Stream based problems involve processing data in a continuous flow rather than all at once.

• Use stream processing libraries like Apache Kafka or Apache Flink

• Consider factors like data volume, velocity, and variety

• Implement backpressure mechanisms to handle high data loads

Closure is a function that captures the environment in which it was created, allowing it to access variables from its outer scope even after the outer function has finished executing.

• Closure allows a function to access variables from its outer scope even after the outer function has finished executing.

• It 'closes over' the variables in its lexical scope, preserving their values.

• Closure is commonly used in event handlers, callbacks, and asynchronous code.

• Example: function outer...read more

Check if strings are anagrams by sorting characters and comparing

• Sort characters in each string and compare if they are equal

• Use a hashmap to count characters in each string and compare the counts

• Example: 'listen' and 'silent' are anagrams