10+ Titagarh Rail Systems Interview Questions and Answers

Calculate the number of ways Preeti can purchase items within budget, with at least one item quantity differing.

• Use dynamic programming to calculate the number of ways to purchase items within budget.

• Consider different scenarios where Preeti buys different quantities of each item.

• Return the result modulo 10^9 + 7 to handle large answers.

The goal is to minimize the size of a sentence by replacing words with prefixes from a given dictionary.

• Iterate through each word in the sentence and check if a prefix exists in the dictionary

• Replace the word with the smallest prefix found in the dictionary

• Repeat the process for all words in the sentence

The one bird was already dead.

• The bird was already dead before the shot was fired.

• The bird was injured and unable to fly away with the rest of the birds.

• The bird was a decoy bird used for hunting purposes.

• The bird was a trained bird used for falconry.

Cut cake into 8 pieces using knife 3 times only.

• First, cut the cake horizontally into two equal halves.

• Then, cut the cake vertically into four equal pieces.

• Finally, cut the cake horizontally again into eight equal pieces.

• Make sure to use the knife efficiently to minimize the number of cuts.

• Practice visualization before making the cuts to avoid mistakes.

ATM transaction involves multiple background processes including authentication, authorization, and communication with bank servers.

• Customer inserts card and enters PIN

• ATM authenticates the card and PIN

• ATM requests authorization from bank server

• Bank server verifies account balance and approves or denies transaction

• ATM dispenses cash or completes other requested transaction

• ATM updates account balance and sends transaction details to bank server

Two tables performing different types of joins

• Inner join: Returns rows when there is a match in both tables

• Left join: Returns all rows from the left table and the matched rows from the right table

• Right join: Returns all rows from the right table and the matched rows from the left table

• Full outer join: Returns all rows when there is a match in either table

Yes, I can catch up with new stack.

• I have a strong foundation in software development and can quickly learn new technologies.

• I have experience in adapting to new programming languages and frameworks.

• I am proactive in keeping up with industry trends and continuously learning new skills.

• I have successfully transitioned to new stacks in previous projects.

• I can provide examples of projects where I quickly learned and utilized new technologies.

Data encapsulation is the concept of bundling data and methods that operate on the data into a single unit, known as a class.

• Encapsulation hides the internal state of an object and only exposes the necessary functionalities through methods.

• It helps in achieving data abstraction and information hiding.

• Example: A class 'Car' encapsulates data like speed, color, and methods like accelerate() and brake().

No, multiple inheritance is not allowed in Java.

• Java does not support multiple inheritance for classes to avoid the diamond problem.

• However, multiple inheritance is allowed for interfaces in Java.

• Example: class A extends B, C is not allowed, but interface X extends Y, Z is allowed.

Static is used to define class-level variables and methods, while final is used to define constants and prevent inheritance or modification.

• Static variables and methods belong to the class itself, while final variables cannot be changed once initialized.

• Static members can be accessed without creating an instance of the class, while final members must be accessed through an instance.

• Static variables are shared among all instances of a class, while final variables are unique to...read more