nCircle Tech Engineer Trainee Interview Questions and Answers

The aptitude test was comprising of questions related to qualitative and quantitative reasoning along with basic computer science questions and coding questions also.

Q1. Why are pointers not used in Java but in C and C++ ?
Ans. 
Java has automatic memory management, so pointers are not needed.
• Java has a garbage collector that automatically manages memory.

• Pointers can lead to memory leaks and security vulnerabilities.

• C and C++ are low-level languages that require manual memory management.
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Q2. Types of access modifiers.
Ans. 
Access modifiers control the visibility and accessibility of class members.
• Public: accessible from anywhere

• Private: accessible only within the class

• Protected: accessible within the class and its subclasses

• Default: accessible within the same package
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Q3. Explain polymorphism.
Ans. 
Polymorphism is the ability of an object to take on many forms.
• Polymorphism allows objects of different classes to be treated as if they are of the same class.

• It is achieved through method overriding and method overloading.

• Examples include function overloading, operator overloading, and inheritance.

• Polymorphism helps in achieving loose coupling and flexibility in code design.
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Q1. Tell me something about yourself.
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Q2. Are you wishing to relocate ?
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Q3. Do you know about the bond ?
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Q1. AWS basic questions were asked
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Q2. MongoDB, MySQL basic questions were asked
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Q1. Difference Between Lists and Tuple
Ans. 
Lists are mutable and can be changed, while tuples are immutable and cannot be changed.
• Lists are defined using square brackets [], while tuples are defined using parentheses ().

• Elements in a list can be modified, added, or removed, while elements in a tuple cannot be changed once defined.

• Lists are typically used for collections of similar items that may need to be modified, while tuples are used for fixed collections o...read more
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DSA questions such as Map, linked list

Three were basic questions around strings and arrays

Q1. Detailed discussion on data structures and algorithms
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Code Snept question with 3-4 Reasoning question. Google form

Pen paper coding round. String , Array . Linkedlist , graph, questions

Q1. Maximum Spaning
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Q2. Nearest Prime number
Ans. 
To find the nearest prime number, iterate from the given number in both directions until a prime number is found.
• Start iterating from the given number in both directions to find the nearest prime number.

• Check if a number is prime by dividing it by all numbers less than its square root.

• Keep track of the closest prime number found during the iteration.
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Q3. Second Maximum Number in Array
Ans. 
Find the second maximum number in an array of strings.
• Convert the array of strings to an array of integers.

• Sort the array in descending order.

• Return the second element in the sorted array.
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Q1. Project Question
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Q2. Robot question of DSA
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Q3. Stock Buy and sell - VI . Leetcode Hard
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Q4. Leetcode Medium
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