DigiValet Interview Questions and Answers

Q1. Array question with easy level on leetcode
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Q2. Array + map question with medium level on leetcode
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Q1. Basic question to check your fundamental are cleared or not .
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Q2. Ask on the basis of resume , oop + one language command is compulsary to clear it.
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Q3. About inheritance, polymorphism , exception handling
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Q4. Sorting , binary search
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Q5. Sql command , react
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Q1. Hashmap internal working
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HashMap in Java uses an array of buckets to store key-value pairs, allowing for efficient retrieval and storage.
• 1. Structure: HashMap uses an array of linked lists (or trees in Java 8+) to store entries.

• 2. Hashing: Keys are hashed to determine their index in the array, which allows for quick access.

• 3. Collision Handling: If two keys hash to the same index, they are stored in a linked list or tree at that index.

• 4. Load ...read more
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Q2. Spring boot starter use
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Spring Boot starters are dependency descriptors that simplify the dependency management process in Spring Boot applications.
• Spring Boot starters provide a set of pre-configured dependencies that can be easily included in your project.

• They help in reducing the amount of boilerplate code needed to set up a Spring Boot application.

• Starters are typically named with the format 'spring-boot-starter-*', where * represents the...read more
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Q3. Concurrnt andsynchrnized collection
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Concurrent collections in Java provide thread-safe operations without explicit synchronization, improving performance in multi-threaded environments.
• Concurrent collections like ConcurrentHashMap allow safe access by multiple threads without locking the entire collection.

• Synchronized collections, such as Collections.synchronizedList, wrap existing collections to make them thread-safe but can lead to contention.

• Example: ...read more
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Q1. What is spring starter?
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A spring starter is a mechanical device used to start an engine by storing energy in a spring and releasing it to turn the engine's crankshaft.
• Spring starters are commonly used in small engines, such as those found in lawnmowers or chainsaws.

• The spring is wound up manually or by pulling a cord, and when released, it rapidly unwinds to start the engine.

• Spring starters are often used as a backup to electric starters in c...read more
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Q2. Whats is arraylist and array
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An array is a data structure that stores a collection of elements of the same data type. ArrayList is a resizable array implementation in Java.
• Array: Fixed-size collection of elements accessed by index. Example: String[] names = new String[5];

• ArrayList: Dynamic-size collection of elements in Java. Example: ArrayList<String> names = new ArrayList<>();
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It consistis of atitude questions along with some core subjects related question

Q1. Question were on Data Analytics
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Q2. OOPS related questions
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