DBS Tech Apprenticeship Trainee Interview Questions, Process, and Tips

40 MCQs on the topics:
Operating Systems, Computer Networks, DBMS, Data Structures, Aptitude.

Q1. What is Objects in OOPS concept?
Ans. 
Objects in OOPS concept are instances of classes that encapsulate data and behavior.
• Objects are created from classes

• Objects have attributes (data) and methods (behavior)

• Objects can interact with each other through method calls

• Example: Class 'Car' can have objects like 'Toyota', 'Honda', etc.
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Q2. Method Overloading vs Method Overriding.
Ans. 
Method overloading is having multiple methods in the same class with the same name but different parameters. Method overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
• Method overloading is resolved at compile time based on the method signature and parameters.

• Method overriding is resolved at runtime based on the actual object type.

• Method overloading is used to pro...read more
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Q3. Binary Search vs Linear Search.
Ans. 
Binary search is more efficient than linear search as it divides the search space in half each time.
• Binary search is O(log n) time complexity, while linear search is O(n).

• Binary search requires a sorted array, while linear search does not.

• Example: Searching for a specific word in a dictionary - binary search would be more efficient.

• Example: Finding a specific item in a list - linear search may be sufficient.
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Q4. Code snippet of Binary Search.
Ans. 
Binary search is a divide and conquer algorithm that efficiently finds the target value within a sorted array.
• Start by defining the low and high indices of the array.

• Calculate the mid index as (low + high) / 2.

• Compare the target value with the value at the mid index and adjust the low and high indices accordingly.

• Repeat the process until the target value is found or the low index surpasses the high index.
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Q5. SQL query to join 2 tables.
Ans. 
SQL query to join 2 tables
• Use the JOIN keyword to combine rows from two or more tables based on a related column between them

• Specify the columns to be retrieved from each table in the SELECT statement

• Use the ON keyword to specify the join condition
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Q1. English Proficiency Test for evaluating your Reading and Listening ability.
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Q1. Tell about a situation where you have used your leadership skills.
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Q2. Tell us about your skills that you have acquired from Extracurricular Activities that you can transfer to working environments.
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Q3. How will you convey your point to audience during presentation?
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Q4. Tell us about a situation where you have solved a complex problem.
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