Cognizant
20+ Mahle Anand Thermal Systems Interview Questions and Answers
Q1. Pair Sum Problem Statement
You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.
Note:
Each pa...read more
Q2. Minimum Steps for a Knight to Reach Target
Given a square chessboard of size 'N x N', determine the minimum number of moves a Knight requires to reach a specified target position from its initial position.
Expl...read more
Q3. Ways To Make Coin Change
Given an infinite supply of coins of varying denominations, determine the total number of ways to make change for a specified value using these coins. If it's not possible to make the c...read more
Q4. Maximum Product Subarray Problem Statement
Given an array arr
of integers, your task is to identify the contiguous subarray within the array which has the highest product of its elements. Return this maximum pr...read more
Q5. Sort Array Problem Statement
Given an array consisting of 'N' positive integers where each integer is either 0, 1, or 2, your task is to sort the given array in non-decreasing order.
Input:
Each input starts wi...read more
Q6. Quick Sort Problem Statement
You are given an array of integers. Your task is to sort this array in ascending order using the Quick Sort algorithm.
Quick Sort utilizes a divide and conquer approach where a pivo...read more
Q7. Rat In a Maze Problem Statement
Given a N * N
maze with a rat placed at position MAZE[0][0]
, find and print all possible paths for the rat to reach its destination at MAZE[N-1][N-1]
. The rat is allowed to move ...read more
Q8. Remove Duplicates from Sorted Array Problem Statement
You are given a sorted integer array ARR
of size N
. Your task is to remove the duplicates in such a way that each element appears only once. The output shou...read more
Q9. What are the bounding methods in React? Difference between Class Component and Functional Component in ReactJS?
Bounding methods in React are used to limit the scope of a component's updates.
Bounding methods include shouldComponentUpdate, getSnapshotBeforeUpdate, and componentDidUpdate.
shouldComponentUpdate allows a component to decide if it should update based on changes in props or state.
getSnapshotBeforeUpdate allows a component to capture information before a change is made to the DOM.
componentDidUpdate is called after a component updates and can be used to perform additional actio...read more
Q11. Write a program to perform Binary search on an array of N numbers.
Program to perform Binary search on an array of N numbers.
Sort the array in ascending order
Set low and high variables to the first and last index of the array respectively
Calculate the mid index as (low+high)/2
If the element at mid index is equal to the search element, return mid
If the element at mid index is less than the search element, set low to mid+1
If the element at mid index is greater than the search element, set high to mid-1
Repeat until low is greater than high or e...read more
Q12. What are the different regularization techniques?
Regularization techniques are used to prevent overfitting in machine learning models.
L1 regularization (Lasso)
L2 regularization (Ridge)
Elastic Net regularization
Dropout regularization
Early stopping
Data augmentation
Batch normalization
Q13. What is virtual DOM and why ReactJS uses it?
Virtual DOM is a lightweight copy of the actual DOM used for efficient updates.
Virtual DOM is a concept where a lightweight copy of the actual DOM is created.
ReactJS uses it to efficiently update the UI without re-rendering the entire page.
Virtual DOM compares the previous and current states and updates only the necessary changes.
This results in faster rendering and better performance.
Example: When a user types in a search bar, only the search results are updated, not the ent...read more
Q14. Explain all the stages of creating a machine learning model on a given dataset
Creating a machine learning model involves data preparation, model selection, training, evaluation, and deployment.
Data preparation involves cleaning, transforming, and splitting the data into training and testing sets.
Model selection involves choosing the appropriate algorithm and hyperparameters for the problem.
Training the model involves feeding the training data to the algorithm and adjusting the parameters to minimize the error.
Evaluation involves testing the model on th...read more
Q15. Write a program to perform Merge sort on an array of N numbers.
Program to perform Merge sort on an array of N numbers.
Divide the array into two halves recursively
Sort the two halves using merge sort
Merge the two sorted halves
Repeat until the entire array is sorted
Time complexity: O(nlogn)
Q16. What is the formula for gradient descent?
Gradient descent is an optimization algorithm used to minimize the cost function of a machine learning model.
Start with an initial guess for the model parameters
Calculate the gradient of the cost function with respect to each parameter
Update the parameters in the opposite direction of the gradient
Repeat until convergence or a maximum number of iterations is reached
Q17. What is your favourite technology?
My favorite technology is artificial intelligence.
AI has the potential to revolutionize various industries
It can automate repetitive tasks and improve efficiency
AI can also help in making better decisions by analyzing large amounts of data
Examples include chatbots, image recognition, and predictive analytics
Q18. What is poison distribution?
Poison distribution refers to the spread of toxic substances through various means.
Poison distribution can occur through intentional or accidental means.
Examples include the distribution of poison through food or water, or the release of toxic chemicals into the environment.
Poison distribution can have serious health consequences and may require immediate medical attention.
Prevention measures such as proper storage and disposal of toxic substances can help prevent poison dist...read more
Q19. What is PCA?
PCA stands for Principal Component Analysis. It is a statistical technique used for dimensionality reduction.
PCA is used to identify patterns in data and reduce the number of variables in a dataset.
It works by transforming the original variables into a new set of variables called principal components.
These principal components are ordered by the amount of variance they explain in the data.
PCA is commonly used in fields such as finance, biology, and image processing.
Example: P...read more
Q20. Explain any clustering algorithm.
Clustering algorithm groups similar data points together based on their characteristics.
Clustering is an unsupervised learning technique.
It can be used for customer segmentation, image segmentation, etc.
K-means, hierarchical clustering, and DBSCAN are popular clustering algorithms.
The choice of algorithm depends on the data and the problem at hand.
Q21. Find if the 5th bit of a number is set or cleared
To find if the 5th bit of a number is set or cleared.
Use bitwise AND operator with 0b10000 to check if the 5th bit is set or cleared.
If the result is 0, the 5th bit is cleared. If it is greater than 0, the 5th bit is set.
Example: num & 0b10000 == 0 means 5th bit is cleared in num.
Q22. Write a program to reverse your name.
A program to reverse a given name.
Create a variable to store the name
Loop through the name from the last character to the first
Add each character to a new variable
Print the reversed name
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