Tech Mahindra Software Engineer Interview Questions, Process, and Tips

Q1. Ask about introduction
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Particular subject what they given

Topic must be hailet and best explanation best confidence should be able to perform

Q1. Tell me your daily activities
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Q1. What are your Salary expectations
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Round duration - 60 minutes
Round difficulty - Easy

Technical round with coding questions and OOPS questions.

Q1. 
Factorial Calculation Problem
Given an integer N, calculate and print the factorial of N. The factorial of a number N is defined as the product of all positive integers up to N.
Example:
Input:
N = 4
...read more
Ans. 
Calculate and print the factorial of a given integer N.
• Iterate from 1 to N and multiply each number to calculate factorial.

• Handle edge cases like N=0 or N=1 separately.

• Use recursion to calculate factorial efficiently.

• Consider using dynamic programming to optimize factorial calculation.

• Ensure to handle large values of N to prevent overflow issues.
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Q2. 
Reverse a String Problem Statement
Given a string STR containing characters from [a-z], [A-Z], [0-9], and special characters, determine the reverse of the string.
Input:
The input starts with a single i...read more
Ans. 
Reverse a given string containing characters from [a-z], [A-Z], [0-9], and special characters.
• Iterate through the characters of the string from end to start and append them to a new string to get the reversed string.

• Use built-in functions like reverse() or StringBuilder in languages like Java for efficient reversal.

• Handle special characters and numbers along with alphabets while reversing the string.

• Ensure to print eac...read more
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Q3. What is the difference between malloc and calloc?
Ans. 
malloc is used to allocate memory without initializing it, while calloc is used to allocate memory and initialize it to zero.
• malloc allocates a block of memory of specified size, while calloc allocates a block of memory for an array of elements, each initialized to zero

• malloc does not initialize the allocated memory, while calloc initializes the allocated memory to zero

• malloc returns a pointer to the allocated memory b...read more
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Q4. What is a dangling pointer?
Ans. 
A dangling pointer is a pointer that points to a memory location that has been deallocated, leading to undefined behavior.
• Dangling pointers can occur when memory is freed but the pointer is not set to NULL.

• Accessing a dangling pointer can result in crashes, data corruption, or security vulnerabilities.

• Example: int *ptr = new int; delete ptr; // ptr is now a dangling pointer
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Round duration - 60 minutes
Round difficulty - Easy

Technical round with coding questions and OOPS questions.

Q1. 
Maximum Sum Subarray Problem Statement
Given an array of integers, find the maximum sum of any contiguous subarray within the array.
Example:
Input:
array = [34, -50, 42, 14, -5, 86]
Output:
137
Exp...read more
Ans. 
Find the maximum sum of any contiguous subarray within an array in O(N) time complexity.
• Use Kadane's algorithm to find the maximum sum subarray in O(N) time complexity

• Initialize max_sum and current_sum to the first element of the array

• Iterate through the array, updating current_sum and max_sum as needed

• Return max_sum as the maximum sum of any contiguous subarray
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Q2. What are storage classes in programming?
Ans. 
Storage classes in programming define the scope and lifetime of variables.
• Storage classes include auto, register, static, and extern.

• Auto variables are local to the block they are declared in.

• Register variables are stored in CPU registers for faster access.

• Static variables retain their value between function calls.

• Extern variables are declared outside of any function and can be accessed by multiple files.
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Q3. What is a copy constructor?
Ans. 
A copy constructor is a special type of constructor that creates a new object as a copy of an existing object.
• Used to initialize a new object as a copy of an existing object

• Takes an object of the same class as a parameter

• Often used to create deep copies of objects
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Round duration - 30 minutes
Round difficulty - Easy

HR round with typical behavioral problems.

Q1. Why are you looking for a change?
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Q2. Where do you see yourself in 5 years?
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Q3. Why should we hire you?
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Q4. Share details of your previous job.
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Q5. What is your family background?
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Q6. What are your salary expectations?
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