Cohesity Software Developer Interview Questions and Answers

Q1. Questions were completely based on data structures and algorithm
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Q2. SQL based questions were also asked
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1 hour , dsa, hackerearth, medim to hard

Q1. Dsa question was asked in it
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Q2. Questions related to resume was asked
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Q1. Internal working of Hashmap
Ans. 
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.

• To retrieve a value, the key is hashed a...read more
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Q2. Memory management in java
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Java uses automatic memory management through garbage collection to allocate and deallocate memory.
• Java uses garbage collection to automatically manage memory allocation and deallocation.

• Garbage collection runs in the background to reclaim memory from objects that are no longer in use.

• Java provides the 'finalize()' method to allow objects to perform cleanup before being garbage collected.
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Programming assessment tools used to objectively evaluate a candidates programing skills across parameters such as problem solving, coding aptitude and debugging

Q1. 1. Do you prefer working independently or as a part of a team
Ans. I'm prefer working as a part of a team
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Q2. As a part of an
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Find out a string is palindrome or not

Q1. ACID properties
Ans. 
ACID properties are a set of properties that guarantee database transactions are processed reliably.
• ACID stands for Atomicity, Consistency, Isolation, Durability

• Atomicity ensures that all operations in a transaction are completed successfully or none at all

• Consistency ensures that the database remains in a consistent state before and after the transaction

• Isolation ensures that transactions are executed independently of...read more
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Q2. Event loop in node js
Ans. 
Event loop in Node.js manages asynchronous operations by executing callback functions when certain events occur.
• Event loop is responsible for handling I/O operations, timers, and callbacks in Node.js

• It allows Node.js to perform non-blocking operations efficiently

• Event loop continuously checks the event queue and executes callback functions when events are triggered
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Q3. Trigger and cursor
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Q4. Primary vs foreign vs unique key
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Primary key uniquely identifies a record, foreign key links to a primary key in another table, unique key ensures uniqueness of a column or set of columns.
• Primary key: uniquely identifies each record in a table (e.g. employee_id in an employees table)

• Foreign key: links to a primary key in another table to establish a relationship (e.g. department_id in an employees table linking to department_id in a departments table)

• ...read more
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Q5. Project related Questions and whats your job role in that project
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Q6. Variable hoisting in js
Ans. 
Variable hoisting is a behavior in JavaScript where variable declarations are moved to the top of their scope during compilation.
• Variable declarations are hoisted to the top of their function or global scope.

• Only the declarations are hoisted, not the initializations.

• Hoisting allows you to use a variable before it is declared, but it is best practice to declare variables at the top of the scope.

• Example: console.log(myV
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Q7. Function closure in js
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Function closure in JavaScript allows a function to access variables from its outer scope even after the outer function has finished executing.
• Function closures occur when a function is defined within another function and the inner function has access to the outer function's variables.

• Closures are commonly used to create private variables and functions in JavaScript.

• Example: function outerFunction() { let outerVar = 'I...read more
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Q8. Shallow vs deep copy in js
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Shallow copy creates a new object but references the same nested objects, while deep copy creates a new object with copies of all nested objects.
• Shallow copy only copies the top-level object, not the nested objects.

• Deep copy creates new copies of all nested objects, ensuring they are independent.

• In JavaScript, shallow copy can be achieved using Object.assign or spread operator, while deep copy can be achieved using JSO
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Q1. -SQL basics , HTML and basic javascript
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