ZeroFOX Senior Piping Engineer Interview Questions and Answers

General aptitude questions will be asked

Q1. Salesforce.com technical questions will be asked
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Q1. Salary negotiation etc
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Generic dotnet questions mcq

Q1. .net, c# , sql , async questions
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One problem is given need to make logic and your current project details

Managerial round was taken at the end

Q1. Linked list CRUD operations
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Q2. Invert the bits
Ans. 
Inverting bits means flipping each bit in a binary representation from 0 to 1 and from 1 to 0.
• Bitwise NOT Operator: In many programming languages, the bitwise NOT operator (~) can be used to invert bits. For example, ~5 (binary 0101) results in -6 (binary 1010).

• Binary Representation: To invert bits, first convert a number to its binary form. For example, the binary of 6 is 110, and inverting it gives 001.

• Example: Inver...read more
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Q1. A string contains parenthesis, curly brackets and square brackets. Check if the string is valid or not.
Ans. 
Check if a string containing parenthesis, curly brackets, and square brackets is valid.
• Use a stack to keep track of opening brackets

• Pop from stack when encountering a closing bracket, ensuring it matches the corresponding opening bracket

• Return false if stack is not empty at the end
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Q1. Find the memory of the given structure (Struct padding is the hint)
Ans. 
The question asks to find the memory of a given structure by considering struct padding.
• Struct padding refers to the unused bytes added to align the members of a structure.

• To find the memory of a structure, we need to consider the size of each member and the padding added.

• The total memory of a structure is the sum of the sizes of its members and the padding.
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Q2. Write code to find the position of a number in a BST
Ans. 
Code to find the position of a number in a BST
• Implement a recursive function to traverse the BST

• Compare the target number with the current node value

• If the target is smaller, go to the left subtree; if larger, go to the right subtree

• Repeat until the target is found or the subtree is null
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Q3. Create a Trie data structure and perform insertion and search on it.
Ans. 
A Trie is a tree-like data structure used for efficient retrieval of strings. It supports insertion and search operations.
• A Trie is also known as a prefix tree.

• Each node in the Trie represents a character.

• The root node represents an empty string.

• Each node can have multiple children, each representing a different character.

• Insertion involves traversing the Trie and creating new nodes as needed.

• Search involves traversing...read more
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Q1. Boq of 1 KM 11 kV line.
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Q2. Boq of 1 km LT line
Ans. 
BOQ of 1 km LT line is a document that lists all the items required for the construction of a 1 km low tension line.
• BOQ stands for Bill of Quantities

• The BOQ includes details of materials, quantities, and prices

• The BOQ helps in estimating the total cost of the project

• Example items in the BOQ for a 1 km LT line: conductor, insulators, poles, transformers, hardware fittings, etc.
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Q1. Standerd size of brick
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Standard size of a brick is 3 5/8 inches x 2 1/4 inches x 8 inches.
• Standard size of a brick is 3 5/8 inches x 2 1/4 inches x 8 inches

• Brick sizes can vary slightly depending on the manufacturer or region

• Bricks are commonly used in construction for building walls, pavements, and other structures
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Q1. About yourself?
Ans. 
I am a seasoned engineer with over 10 years of experience in software development, specializing in scalable systems and team leadership.
• Led a team of 5 engineers in developing a cloud-based application that increased client efficiency by 30%.

• Implemented Agile methodologies, resulting in a 25% reduction in project delivery time.

• Contributed to open-source projects, enhancing my skills and giving back to the community.

• Men...read more
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Q2. Power sector experience?
Ans. 
Extensive experience in power sector, focusing on renewable energy, grid management, and project implementation.
• Led a team in the implementation of a solar power project that increased energy output by 30%.

• Managed grid integration for a wind farm, ensuring compliance with regulatory standards.

• Conducted feasibility studies for new power plants, analyzing environmental impact and cost efficiency.

• Collaborated with cross-f...read more
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Q1. Previous works related questions in detail.
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Q2. Water supply related question will put in front of you, if you are working in the same field.
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Q1. If clear the round 1 then 2nd round will not be much difficult for that person.
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Q1. Salary negotiations will done in this round.
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