Landmark Group Data Engineer Interview Questions and Answers

1 hr test with mcq and coding snippet

Q1. What are pointers in c?
Ans. 
Pointers are variables that store memory addresses of other variables in C programming language.
• Pointers are used to manipulate data structures like arrays, linked lists, and trees.

• They can be used to pass values by reference to functions.

• Pointers can also be used to allocate memory dynamically using functions like malloc() and calloc().
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Q2. Write a linked list program.
Ans. 
A linked list program is a data structure that stores a sequence of elements with pointers to the next element.
• Create a Node class with a value and a next pointer

• Create a LinkedList class with a head pointer and methods to add, remove, and traverse nodes

• Example: LinkedList ll = new LinkedList(); ll.add(5); ll.add(10); ll.remove(5);
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Q3. Applications of data structures
Ans. 
Data structures are used to organize and manipulate data efficiently in various applications.
• Data structures are used in databases to store and retrieve data quickly.

• In computer graphics, data structures are used to represent geometric objects.

• Data structures are used in algorithms such as sorting and searching.

• In networking, data structures are used to represent network packets and routing tables.

• Data structures are u...read more
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Q4. Algorithm for merge sort
Ans. 
Merge sort is a divide and conquer algorithm that recursively divides the input array into two halves, sorts them and then merges them.
• Divide the array into two halves

• Recursively sort the two halves

• Merge the sorted halves

• Repeat until the entire array is sorted
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Q5. Cloud computing application in real world in project
Ans. 
Cloud computing is widely used in various industries for data storage, processing, and analysis.
• Cloud computing allows for easy scalability and cost-effectiveness in managing large amounts of data.

• Real-time collaboration and access to data from anywhere are some of the benefits of cloud computing.

• Examples of cloud computing applications in real-world projects include Amazon Web Services (AWS), Microsoft Azure, and Goog...read more
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Q6. Java and nodejs questions
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Q1. What is array?? Detail in programming
Ans. 
An array is a collection of similar data types stored in contiguous memory locations.
• Arrays can be one-dimensional or multi-dimensional

• Elements in an array can be accessed using their index

• Arrays can be initialized during declaration or later in the code

• Arrays can be passed as arguments to functions

• Example: int arr[5] = {1, 2, 3, 4, 5};

• Example: char str[10] = "Hello";
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Q2. About programming and Java script
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C and c++ and data structure

Q1. Question front Data structure, c++ and c
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Q1. Ask all those questions that you want
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I like to choose topics java, c, python, html etc

About java, python, c, c++, html and about coding language

Hoe to built skill discussion about problem and how solve it

Q1. Have you worked in databricks
Ans. 
Yes, I have worked in Databricks for data engineering projects.
• I have experience using Databricks for data processing and analysis.

• I have utilized Databricks for building and optimizing data pipelines.

• I have worked with Databricks notebooks for coding and collaboration.

• I have used Databricks clusters for scalable data processing.

• I have integrated Databricks with other tools like Apache Spark for big data processing.
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Q1. About current job profile
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Q2. About family , company, job profile
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Q1. About family and work experience
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