Gut Lernen Technocraft Interview Questions and Answers

60 questions in 60 minutes

Q1. Concepts of SQL
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Q2. Concept of tecgnical skill in resume
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Programs of Strings to reverse without using inbuilt function
Arrays and arraylist programs

Q1. Framework Structure ArrayList vs HashMap
Ans. 
ArrayList is a dynamic array to store elements, while HashMap is a key-value pair data structure for fast retrieval.
• ArrayList is ordered and allows duplicate elements, HashMap is unordered and does not allow duplicate keys.

• ArrayList uses indexes to access elements, HashMap uses keys to access values.

• ArrayList is ideal for storing a collection of objects, HashMap is suitable for mapping keys to values.

• Example: ArrayList...read more
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Q2. Array vs ArrayList vs HashMap
Ans. 
Array is a fixed-size collection of elements, ArrayList is a dynamic array that can grow in size, and HashMap is a key-value pair collection.
• Array: Fixed size, faster access, can store primitive data types and objects.

• ArrayList: Dynamic size, slower access than array, can store objects only, provides methods for adding, removing, and accessing elements.

• HashMap: Key-value pairs, allows for fast retrieval of values based
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