Think Future Technologies Interview Questions and Answers

2 sum program from Geeks for Geeks

Q1. Ruby basics Eigen class Callbacks
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Q2. Lazy and Eagar loading N+1 problem
Ans. 
Lazy loading delays loading of related data until it is specifically requested, while eager loading loads all related data upfront. N+1 problem occurs when lazy loading results in multiple additional queries being made.
• Lazy loading is used to improve performance by only loading related data when needed

• Eager loading loads all related data upfront to reduce the number of queries made

• N+1 problem occurs in lazy loading whe...read more
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Q3. Puzzles
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Q1. AWS basics with CI/CD
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Q2. Deployment to AWS
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Q1. Basic introduction and salary discussion
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Q1. Based on Deep learning
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Q1. Questions related to Speech to Text, Whisper AI, Transformers, Deep learning
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Q1. Work culture fit and CEO round
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Logical reasoning questions (1-1.5 hours)

DSA Questions(2 hours)

Q1. How soon I can start?
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Q2. I am flexible with work timings?
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Q1. ACID Properties
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ACID properties are a set of properties that guarantee database transactions are processed reliably.
• 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 the execution of multiple transactions concurrently does not interfere with each other.

• Durability:...read more
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Q2. Mid point of a linked list
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To find the mid point of a linked list, use two pointers - one moving at double the speed of the other.
• Initialize two pointers, slow and fast, at the head of the linked list.

• Move the slow pointer by one node and the fast pointer by two nodes until the fast pointer reaches the end of the list.

• The node at which the slow pointer is currently pointing is the mid point of the linked list.
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Q3. Merge Sort Algorithm
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Merge Sort is a divide and conquer algorithm that divides the input array into two halves, sorts them separately, and then merges them.
• Divide the array into two halves recursively

• Sort each half separately

• Merge the sorted halves back together
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Q4. Foreign key in relational database
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Foreign key is a field in a relational database table that links to a primary key in another table.
• Ensures referential integrity between tables

• Used to establish relationships between tables

• Prevents orphan records

• Can be used to enforce constraints
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Q5. Max sum subarray problem
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Max sum subarray problem involves finding the subarray with the largest sum within an array.
• Iterate through the array and keep track of the current sum and maximum sum seen so far.

• If the current sum becomes negative, reset it to 0 as it won't contribute to the maximum sum.

• Return the maximum sum found.

• Example: For array [-2, 1, -3, 4, -1, 2, 1, -5, 4], the max sum subarray is [4, -1, 2, 1] with sum 6.
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Q1. Negative scenarios of pen,
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Negative scenarios of pen include ink leakage, broken tip, running out of ink, smudging, and losing cap.
• Ink leakage can ruin documents or clothing

• Broken tip can make writing difficult

• Running out of ink can be frustrating in the middle of an important task

• Smudging can make writing illegible

• Losing cap can cause ink to dry out
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Q2. Test plan vs test statergy
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Test plan outlines the scope, approach, resources, and schedule of testing, while test strategy defines the overall testing approach.
• Test plan details the specific test cases, test objectives, and test environment.

• Test strategy defines the testing methods, tools, and techniques to be used.

• Test plan is more detailed and focuses on individual test cases, while test strategy is high-level and focuses on overall testing ap...read more
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Q3. CRUD commands in API
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CRUD commands in API refer to Create, Read, Update, and Delete operations for interacting with data.
• Create - POST request to add new data

• Read - GET request to retrieve data

• Update - PUT or PATCH request to modify existing data

• Delete - DELETE request to remove data
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Q1. About work experience, lifestyle, hobbies,
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Q2. Tech round with project lead
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