Birlasoft Senior Software Developer Interview Questions, Process, and Tips

Q1. Related to my domain, windows os related, Patch management, active directory etc
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Q1. Same questions in depth for second round
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Q1. What are your salary expectations?
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Q1. About soa 11g and 12c
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Q2. Xa and non xa difference
Ans. 
XA is a distributed transaction protocol while non-XA is not.
• XA is used for distributed transactions that involve multiple resources.

• Non-XA is used for local transactions that involve a single resource.

• XA ensures transactional consistency across multiple resources.

• Non-XA does not provide transactional consistency across multiple resources.

• XA involves a two-phase commit protocol while non-XA does not.
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Round duration - 60 minutes
Round difficulty - Medium

This round was completely based on Javascript and React.js.

Q1. What are closures?
Ans. 
A closure is the result of combining a function with the lexical environment in which it was declared. It is an inner function that has access to the variables of the outer or enclosing function. There are three scope chains in the closure:
1. Variables are defined between curly brackets in its own scope.
2. Variables in the outer function
3. Variables at the global level
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Q2. What is the prototype chain in JavaScript?
Ans. 
Prototype chaining is a technique for creating new items from existing ones. In a class-based language, it's similar to inheritance.
Object.getPrototypeOf(object) or the proto property can be used to get the prototype of an object instance, whereas Object.prototype can be used to retrieve the prototype of a constructor function.
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Q3. What is the difference between 'slice' and 'splice' in programming?
Ans. 
1. Slice Doesn't modify the original array(immutable) while Splice Modifies the original array(mutable). 
2. Slice returns the subset of original array while splice returns the deleted elements as array
3. Slice is used to pick the elements from array. Splice is used to insert or delete elements to/from array
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Q4. What is the difference between React context and React Redux?
Ans. 
Context may be used directly in your application and is ideal for passing data down to deeply nested components, which is exactly what it was meant for.
Redux, on the other hand, is far more powerful and has many features that the Context API does not. React Redux also uses context internally, but this isn't disclosed in the public API.
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Q5. What is a state in React and how is it used?
Ans. 
React components are built around states. States serve as a data source and should be made as basic as feasible. In a nutshell, states are the objects that determine how components are rendered and behave. They, unlike the props, are malleable and produce dynamic and interactive elements. This is how you get to them. state().
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Q6. What are some design patterns in JavaScript and how do they work?
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