Bitgo Infotech Full Stack Engineer Interview Questions and Answers

Basic coding question

Q1. Basic Technical Question
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Q2. Questions on oops concept
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THERE ARE QUANTS, REASONING AND VERBAL

Q1. MY ROLE IS PROGRAM ANALYST TRAINEE. IN HR ROUND THEY ASKED ME IN CORE: 1. WHAT IS FLIP FLOP 2. WHAT IS DIODE IN PROGRAMMING: 1. WHAT IS ENCAPSULATION. 2. WHAT IS ABSTRACTION. 3. WHAT IS INHERITANCE. 4. ...read more
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Q2. AFTER TECHNICAL HR ROUND THERE IS PERSONAL HR ROUND. IN THAT ROUND THEY VERIFY OWR CERTIFICATE LIKE PAN, AADAAR CARD, 10TH AND 12TH CERTIFICATE.
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Aptitude test questions, let's test your knowledge about preposition

Q1. Tell me about your self
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Sir/Madam. First of all, Thank you for giving me this opportunity to introduce my self. My Name Samiksha Dhalwar. I am from yavatmal. I did my bachelor's degree in BCA from CMCS college amravati University. Currently I am pursuing my master degree in MCA from GH Raisoni amravati University .I am skilled in react JS and have good knowledge of Java.I intern in growsoft Technologies LLP company as a Full stack developmen
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Q2. What is your strength and weekness
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Sir,I am hardworking self motivated and optimistic person. I always over prepare for any work that is assigned to me
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Q3. Why do you need job
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Q4. What are your career goals
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Q5. Why do you want to join in this company
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As s fresher, I need a platform to start my career. I have gone throught your company profile and learnt that your company encourage fresh talent and provide good work culture .By joining your company.
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Q1. Tell me about yourself
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Q1. What is sychronization ?
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Synchronization is the process of coordinating multiple threads to ensure safe and consistent access to shared resources.
• Synchronization is used to prevent race conditions and ensure thread safety.

• It can be achieved using synchronized blocks or methods.

• Synchronization can cause performance issues if not used properly.

• Example: Synchronizing access to a shared counter variable in a multi-threaded application.
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Q2. What is encapsulation ?
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Encapsulation is the process of hiding implementation details and providing access to only necessary information.
• Encapsulation is achieved through access modifiers such as public, private, and protected.

• It helps in achieving data abstraction and information hiding.

• Encapsulation provides better control over the data and prevents unauthorized access.

• Example: A class with private variables and public methods to access the...read more
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Q3. What is interface in java ?
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An interface in Java is a collection of abstract methods and constants that can be implemented by a class.
• Interfaces are used to achieve abstraction and provide a way to implement multiple inheritance in Java.

• All methods in an interface are abstract by default and cannot have a body.

• A class can implement multiple interfaces but can only extend one class.

• Interfaces can also have default and static methods with a body.

• Ex...read more
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Q4. What is collection framework?
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Collection framework is a set of classes and interfaces that provide a way to store and manipulate groups of objects.
• It provides interfaces like List, Set, Queue, etc. for storing collections of objects.

• It also provides classes like ArrayList, HashSet, PriorityQueue, etc. that implement these interfaces.

• It allows easy manipulation of collections using methods like add, remove, contains, etc.

• It provides algorithms like ...read more
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Q5. What is diffrence between Arraylist and vector ?
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ArrayList is not synchronized while Vector is synchronized.
• ArrayList is faster than Vector as it is not synchronized.

• Vector is thread-safe while ArrayList is not.

• Vector is a legacy class while ArrayList is not.

• Vector can grow by a specified amount while ArrayList grows by 50% of its size.

• Example: ArrayList list = new ArrayList<>(); Vector vector = new Vector<>();

• Example: list.add(1); vector.add(1);

• Example: list.get(0);
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Q6. What are the legacy classes in java?
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Legacy classes in Java are the classes that have been replaced by newer versions but are still supported for backward compatibility.
• Legacy classes are part of the Java API and are still supported for backward compatibility.

• They have been replaced by newer versions but are still used in older applications.

• Examples of legacy classes include Vector, Hashtable, and Enumeration.

• Legacy classes are not recommended for use in ...read more
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Q7. What is joins in SQL ?
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Joins in SQL are used to combine data from two or more tables based on a related column.
• Joins are used to retrieve data from multiple tables in a single query.

• There are different types of joins such as inner join, left join, right join, and full outer join.

• Inner join returns only the matching rows from both tables, left join returns all rows from the left table and matching rows from the right table, right join returns...read more
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Q8. What is autoboxing and auto-unboxing ?
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Autoboxing is the automatic conversion of primitive data types to their corresponding object wrapper classes.
• Autoboxing allows primitive data types to be used as objects.

• Auto-unboxing is the reverse process of autoboxing.

• Autoboxing and auto-unboxing are performed automatically by the compiler.

• Example: int i = 10; Integer j = i; // autoboxing

• Example: Integer j = 10; int i = j; // auto-unboxing
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Q9. Difference between where clause and having clause in SQL ?
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Where clause filters rows before grouping, having clause filters groups after grouping.
• Where clause is used to filter rows based on a condition before grouping.

• Having clause is used to filter groups based on a condition after grouping.

• Where clause is used with SELECT, UPDATE, DELETE statements.

• Having clause is used with SELECT statement and GROUP BY clause.

• Where clause cannot contain aggregate functions.

• Having clause c...read more
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Q1. Tell me about your self. Why are you interested in this company/role?
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Q2. Do you have any questions for us
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Q3. Greatest professional achievement so far
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Q4. Short team and long team goals
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Q5. Your strength & weakness
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Quantitive aptitude, reasoning

Q1. Tell me about yourself
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Q2. What is your weakness and strength?
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Q3. Why should I hire you
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Q1. Programming related questions
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