uCertify Interview Questions and Answers

Q1. Tell me about your About project manager skills
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Q2. What is ITIL PROCESS
Ans. 
ITIL (Information Technology Infrastructure Library) is a set of best practices for IT service management.
• ITIL is a framework that outlines processes, tasks, and checklists for managing IT services.

• It focuses on aligning IT services with the needs of the business and improving efficiency.

• ITIL processes include incident management, problem management, change management, and more.

• ITIL helps organizations deliver value to...read more
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Round duration - 120min
Round difficulty - Easy

Q1. What are semaphores?
Ans. 
Semaphores are synchronization primitives used to control access to shared resources in a multi-threaded environment.
• Semaphores can be used to limit the number of threads accessing a resource simultaneously.

• They can be binary (mutex) or counting semaphores.

• Operations on semaphores include wait (P) and signal (V).

• Example: In a producer-consumer problem, semaphores can be used to control access to a shared buffer.
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Q2. 
Graph Coloring Problem
You are given a graph with 'N' vertices numbered from '1' to 'N' and 'M' edges. Your task is to color this graph using two colors, such as blue and red, in a way that no two adjacen...read more
Ans. 
Check if a given graph can be colored using two colors without adjacent vertices sharing the same color.
• Use graph coloring algorithm like BFS or DFS to check if adjacent vertices can be colored with different colors.

• If there are odd cycles in the graph, it is not possible to color the graph with two colors.

• If the graph is bipartite, it is always possible to color the graph with two colors.

• Example: For the input 5 4, 1
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Round duration - 50 minutes
Round difficulty - Easy

Q1. 
Water Flow Problem Statement
You are given a matrix 'A' of size 'N' x 'M', where each cell contains the height of water placed in that cell. Water can flow in four directions: up, down, left, and right, b...read more
Ans. 
Find coordinates from which water can flow to both the Pacific and Atlantic Oceans in a given matrix of water heights.
• Create a function that takes in the matrix 'A' and its dimensions 'N' and 'M'.

• Implement a depth-first search (DFS) algorithm to find all coordinates from which water can flow to both oceans.

• Keep track of visited cells and use two separate DFS calls to find coordinates for each ocean.

• Sort and return the
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Round duration - 10 minutes
Round difficulty - Easy

Q1. Can you tell us about yourself and your projects?
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Round duration - 50 minutes
Round difficulty - Easy

Q1. 
The Skyline Problem
Compute the skyline of given rectangular buildings in a 2D city, eliminating hidden lines and forming the outer contour of the silhouette when viewed from a distance. Each building is ...read more
Ans. 
Compute the skyline of given rectangular buildings in a 2D city, eliminating hidden lines and forming the outer contour of the silhouette.
• Iterate through the buildings and create a list of critical points (x, y) where the height changes.

• Sort the critical points based on x-coordinate and process them to form the skyline.

• Merge consecutive horizontal segments of equal height to ensure no duplicates in the output.
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Q2. 
Sort String with Alternate Lower and Upper Case
Given a string STR containing both lowercase and uppercase letters, the task is to sort the string so that the resulting string contains uppercase and lower...read more
Ans. 
Sort a string with alternate lowercase and uppercase letters in sorted order.
• Split the string into lowercase and uppercase letters.

• Sort the lowercase and uppercase letters separately.

• Merge the sorted lowercase and uppercase letters alternately.
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Round duration - 15 Minutes
Round difficulty - Easy

Round duration - 60 minutes
Round difficulty - Easy

Q1. 
Valid Parentheses Problem Statement
Given a string 'STR' consisting solely of the characters “{”, “}”, “(”, “)”, “[” and “]”, determine if the parentheses are balanced.
Input:
The first line contains an...read more
Ans. 
Check if given strings containing parentheses are balanced or not.
• Use a stack to keep track of opening parentheses

• Iterate through the string and push opening parentheses onto the stack

• When a closing parenthesis is encountered, pop from the stack and check if it matches the corresponding opening parenthesis

• If stack is empty at the end and all parentheses are matched, the string is balanced

• If stack is not empty or mismat...read more
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Round duration - 15 minutes
Round difficulty - Easy