Dell Interview Questions, Process, and Tips

Developed a machine learning model to predict customer churn for a telecom company

• Used Python and scikit-learn for data preprocessing and model building

• Performed feature engineering to improve model accuracy

• Evaluated model performance using metrics like accuracy, precision, and recall

Use Floyd's Cycle Detection Algorithm to detect loop in linked list.

• Initialize two pointers, slow and fast, both pointing to the head of the linked list.

• Move slow pointer by one step and fast pointer by two steps in each iteration.

• If there is a loop, the slow and fast pointers will meet at some point.

• To find the start of the loop, reset one pointer to the head and move both pointers at the same pace until they meet aga

Storage class specifiers in C language define the scope and lifetime of variables.

• Storage class specifiers include auto, register, static, and extern.

• Auto variables are stored in the stack and have local scope.

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

• Static variables retain their value between function calls.

• Extern variables are declared in one file and can be accessed in another file.

Header files in C language are used to declare functions, variables, and constants that are defined in other source files.

• Header files are included at the beginning of a C program using the #include directive.

• They help in organizing code by separating declarations from the actual implementation.

• Common header files in C include , , and .

• Header files can also be created by the user to declare c...read more