Ford Motor Senior Software Developer Interview Questions and Answers

Q1. Java 8 questions. What is lambda function.
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Q2. Given an array use Java 8 feature to sum all no and give output
Ans. 
Sum all numbers in an array using Java 8 features.
• Use the stream() method to convert the array into a stream of elements.

• Use the mapToInt() method to convert the stream of elements into a stream of integers.

• Use the sum() method to calculate the sum of all integers in the stream.
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Q3. Second largest element in an array
Ans. 
Find the second largest element in an array of strings.
• Sort the array in descending order

• Return the element at index 1
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Maximum some in an array

Q1. Java 1.8 questions
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Q2. AWS related questions
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Duration : 1 hour
Topics : Java and DSA

Q1. Linked List, Stack and Queue
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Q2. BFS vs DFS. Graph Traversal
Ans. 
BFS explores neighbors before moving to next level, while DFS explores as far as possible before backtracking.
• BFS uses a queue to keep track of nodes to visit next, while DFS uses a stack or recursion.

• BFS is optimal for finding shortest path in unweighted graphs, while DFS is more memory efficient.

• BFS is typically implemented iteratively, while DFS can be implemented recursively.

• Example: BFS is used in level order trav...read more
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Q1. Why do you want to join us
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Q2. Where do you see yourself in next 5 years.
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Q1. Coding questions on data structures and collections
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Q2. Sort the object by age using Arraylist
Ans. 
Sort an ArrayList of objects by age.
• Create a custom Comparator to compare the age of the objects.

• Use the Collections.sort() method to sort the ArrayList using the custom Comparator.

• Ensure that the objects in the ArrayList have a field for age.
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Q1. Basic Java Question
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Q2. Find out Second Highest Employee Salary
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Q1. Difference between IOC and DI?
Ans. 
IOC is a design pattern where control is inverted, while DI is a technique to achieve IOC by injecting dependencies into a class.
• IOC stands for Inversion of Control, where the control of flow is inverted from the traditional top-down approach.

• DI stands for Dependency Injection, a technique used to implement IOC by injecting dependencies into a class from an external source.

• IOC is a design principle, while DI is a techn...read more
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Q2. Exception handling in the spiring Boot?
Ans. 
Exception handling in Spring Boot allows developers to gracefully handle errors and provide meaningful responses to users.
• Use @ControllerAdvice to handle exceptions globally

• Use @ExceptionHandler to handle specific exceptions

• Return custom error messages or responses to users
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Q3. @RequestBody annotation?
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Annotation used in Spring framework to bind the HTTP request body to a method parameter.
• Used in Spring MVC to indicate that a method parameter should be bound to the body of the web request.

• Can be used with various data types like JSON, XML, etc.

• Helps in simplifying the process of handling request data in Spring applications.
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Q4. Function and BiFunction?
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Q5. Equals and Hashcode ?
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Q6. Type casting in the Java?
Ans. 
Type casting in Java is the process of converting one data type into another.
• Type casting can be done implicitly or explicitly in Java.

• Implicit type casting is done when a smaller data type is converted to a larger data type, while explicit type casting is done when a larger data type is converted to a smaller data type.

• Example of implicit type casting: int num = 10; double result = num;

• Example of explicit type casting
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Q7. Intermediate and terminal operators in Java?
Ans. 
Intermediate and terminal operators are used in Java streams to perform intermediate and terminal operations on elements.
• Intermediate operators are used to transform, filter, or manipulate elements in a stream before passing them to the next operation. Examples include map(), filter(), and sorted().

• Terminal operators are used to trigger the processing of elements in a stream and produce a result. Examples include forEa
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Q8. Functional interface in java?
Ans. 
Functional interface in Java is an interface with only one abstract method. It can have multiple default or static methods.
• Functional interfaces can be annotated with @FunctionalInterface to ensure they have only one abstract method.

• Examples of functional interfaces in Java include Runnable, Callable, and ActionListener.

• Lambda expressions can be used to implement functional interfaces concisely.
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Q9. Various methods in the RestApi?
Ans. 
Various methods in RestApi include GET, POST, PUT, DELETE.
• GET - Used to retrieve data from the server. Example: GET /users

• POST - Used to send data to the server to create a new resource. Example: POST /users

• PUT - Used to update an existing resource on the server. Example: PUT /users/1

• DELETE - Used to delete a resource on the server. Example: DELETE /users/1
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Q10. Coding question find the first non repeting char in the string using java 8.
Ans. 
Using Java 8, find the first non-repeating character in a string.
• Use Java 8 streams to convert the string to a character array.

• Use Collectors.groupingBy to group characters by count.

• Filter out characters with count > 1 and find the first character with count 1.
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Q11. Find the sum of all even numbers without using inbuild methods using stream api.
Ans. 
Sum of all even numbers without using inbuild methods using stream api
• Create an array of numbers

• Use stream to filter out even numbers

• Use stream to sum up the filtered even numbers
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