Celestial Systems Python Automation Engineer Interview Questions and Answers

Hackerrank algorithms and ds test

Q1. Technical on java and aws
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Logical Reasoning, Questions on distances, Questions on directions

1- Difference between array list and linked list.
2- Reverse the linked list

1-Difference between Arraylist and Linked list.
2-Check if strings are anagram.

Q1. Basic technical question oops concept
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Basic maths question - given a number a and b get the nth number which is divisible by both a and b. And one sql query of concatinating the string in the column results.

Other - which movie you watched?
why do you watch?
who is your role model?
Why? What? How? Where?
Silly questions

Q1. Sorting of an array
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Q2. Bubble sorting algorithm
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Q1. Java oops question
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Q1. API questions related to put and patch api
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Q1. Describe Life cycle in react
Ans. 
React has three main phases in its lifecycle: mounting, updating, and unmounting.
• Mounting: when a component is created and inserted into the DOM

• Updating: when a component is updated due to changes in props or state

• Unmounting: when a component is removed from the DOM

• Lifecycle methods can be used to perform actions at each phase, such as componentDidMount() or componentWillUnmount()

• React also has error handling methods,
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Q2. Explain strict mode in javascript and it's use
Ans. 
Strict mode is a way to write secure and optimized JavaScript code.
• Enables catching of silent errors

• Disallows duplicate property names or parameters

• Prevents use of undeclared variables

• Makes `eval()` safer to use

• Throws errors on invalid usage of `this` keyword
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CURD operations along with implementation of a mock UI