20+ Dell Interview Questions and Answers

Program to find duplicates in an array and store them in key-value pairs using hashmap.

• Create a hashmap to store the elements of the array as keys and their frequency as values.

• Iterate through the array and check if the element already exists in the hashmap. If it does, increment the frequency.

• Finally, iterate through the hashmap and print the key-value pairs where the frequency is greater than 1.

To improve performance/memory footprint of Rust program without external tools, focus on optimizing algorithms, data structures, and memory management.

• Optimize algorithms to reduce time complexity

• Use efficient data structures like HashMaps or Vecs

• Minimize memory allocations by reusing objects or using stack allocation

• Avoid unnecessary copying of data

• Implement lazy evaluation to defer computations until needed

I use a combination of debugging tools, logs, code reviews, and collaboration with team members to identify and fix issues.

• Utilize debugging tools such as breakpoints, watchpoints, and step-through debugging to pinpoint the root cause of the issue.

• Analyze logs and error messages to gather more information about the problem.

• Review the code changes made since the last successful unit test to identify potential causes of the issue.

• Collaborate with QA team members to understand t...read more

I review the code thoroughly, understand its functionality, and make necessary changes while following coding standards.

• Review the code to understand its functionality

• Follow coding standards and best practices

• Make necessary changes while ensuring code quality

• Communicate with the original author if needed

C++ and C are programming languages used for system and application development.

• C++ is an object-oriented language that supports polymorphism, inheritance, and encapsulation.

• C is a procedural language that is widely used for system programming and embedded systems.

• Both languages are compiled and have a wide range of applications in software development.

• C++ is often used for developing applications, games, and operating systems.

• C is often used for developing system software, d...read more

Reverse a string in a specific format

• Split the string into an array of words

• Reverse the array

• Join the array into a string with spaces

Finding the middle element of a linked list

• Traverse the linked list using two pointers - one moving one node at a time and the other moving two nodes at a time

• When the faster pointer reaches the end of the list, the slower pointer will be at the middle element

• If the list has even number of elements, there are two middle elements

Different storage classes in C and explanation of static storage class.

• Storage classes in C are auto, register, static and extern.

• Auto storage class is default and variables are stored in stack memory.

• Register storage class is used for variables that need to be accessed quickly and are stored in CPU registers.

• Static storage class is used for variables that retain their value even after function execution and are stored in data segment.

• Static storage class can be used in a pro...read more

Sorting an array of strings

• Use a sorting algorithm like quicksort or mergesort

• Consider the case-insensitive sorting if needed

• Handle special characters and numbers appropriately

Sasken technologies is a leading provider of cutting-edge software solutions.

• Sasken has a strong reputation for delivering high-quality software solutions.

• The company has a diverse range of clients across various industries.

• Sasken offers a great work culture and opportunities for career growth.

• The company has a strong focus on innovation and staying ahead of industry trends.

• Sasken has a proven track record of success in the system software engineering field.

Structures are used to group different data types together while unions are used to store only one value at a time.

• Structures allocate memory for all its members while unions allocate memory for only one member at a time

• Structures are used to represent a collection of related data while unions are used to save memory space

• Structures are accessed using dot operator while unions are accessed using arrow operator

• Example of structure: struct student { char name[20]; int age; floa...read more

I have practical experience in SDLC, STLC, and Defect life cycle.

• I have worked on various phases of SDLC including requirement gathering, design, development, testing, and deployment.

• I have experience in STLC activities such as test planning, test case design, test execution, and defect reporting.

• I have a good understanding of the defect life cycle and have worked on defect tracking tools like JIRA, Bugzilla, and HP ALM.

• I have experience in analyzing and prioritizing defects ...read more

I have experience using JIRA, CodeBeamer, and other similar tools for software QA.

• JIRA for bug tracking and project management

• CodeBeamer for requirements management and test management

• Other tools like TestRail, Zephyr, and HP ALM for test management

• Experience with creating and managing test cases, test plans, and test suites in these tools

To reverse a string in C, you can use a loop to swap characters from the beginning and end of the string.

• Create two pointers, one pointing to the start of the string and the other pointing to the end.

• Swap characters at the two pointers and move them towards each other until they meet in the middle.

• Repeat the swapping process until the entire string is reversed.

Functional pointers program

• Use pointers to pass functions as arguments

• Function pointers can be used to implement callbacks

• Function pointers can be used to implement polymorphism

Bit toggle of a given position in a data

• To toggle a bit at a specific position, use bitwise XOR operator (^) with a mask

• Example: Toggle 3rd bit of a number 'num' - num ^= (1 << 2)

• Ensure the position is within the range of the data

Reverse a linked list

• Iterative approach: Traverse the list and change the pointers to reverse the list

• Recursive approach: Recursively reverse the rest of the list and change the pointers

• Use a stack to push all the nodes and then pop them to create a reversed list

Queues are a data structure that follows the FIFO principle.

• Queues can be implemented using arrays or linked lists.

• Enqueue adds an element to the end of the queue, while dequeue removes an element from the front.

• Peek returns the element at the front of the queue without removing it.

• Queues are used in scheduling, buffering, and breadth-first search algorithms.

Stack is a data structure that follows Last In First Out (LIFO) principle.

• Stack can be implemented using arrays or linked lists.

• Push operation adds an element to the top of the stack.

• Pop operation removes the top element from the stack.

• Peek operation returns the top element without removing it.

• Stack overflow occurs when the stack is full and push operation is performed.

• Stack underflow occurs when the stack is empty and pop operation is performed.