10+ ZIGRAM Interview Questions and Answers

Find the largest palindrome number strictly less than a given palindrome number.

• Iterate from the middle towards the start of the number and decrement the digits to create the largest palindrome less than the given number.

• Handle cases where the number is all '9's by changing the middle digit to '9' and decrementing the rest of the digits.

• If the number has an odd length, simply mirror the first half to create the largest palindrome less than the given number.

Print an hourglass pattern based on the given integer 'N'.

• Read the integer 'N' as input

• Print the top half of the hourglass pattern with decreasing numbers

• Print the bottom half of the hourglass pattern with increasing numbers

• Handle the constraints for 'N' values between 1 and 50

BFS traversal in a disconnected graph starting from vertex 0.

• Use BFS algorithm to traverse the graph starting from vertex 0.

• Explore neighbor nodes first before moving to the next level neighbors.

• Consider bidirectional edges in an undirected graph.

• Output the BFS traversal sequence for each test case in a separate line.

• Ensure the BFS path starts from vertex 0 and print connected nodes in numerical sort order.

Find minimum time to rot all fresh oranges adjacent to rotten oranges in a grid.

• Use Breadth First Search (BFS) to simulate the rotting process.

• Track the time taken to rot all fresh oranges.

• Return -1 if all fresh oranges cannot be rotten.

• Handle edge cases like empty grid or no fresh oranges.

Sort a given stack in ascending order using only push and pop operations with the help of an additional stack.

• Use one additional stack to assist in sorting the elements.

• Pop elements from the input stack and push them onto the auxiliary stack in sorted order.

• Keep track of the current minimum element to maintain ascending order.

• Pop elements from the auxiliary stack back to the input stack to get the sorted order.

Market research is the process of gathering information about a market to make informed business decisions. Primary research involves collecting new data, while secondary research involves analyzing existing data.

• Market research helps businesses understand their target audience, competition, and industry trends.

• Primary research involves methods like surveys, interviews, and focus groups to collect new data.

• Secondary research involves analyzing existing data sources like gover...read more

By using the weight of the crates, as apples and oranges have different average weights.

• Apples are generally lighter than oranges, so the crate that weighs less likely contains apples.

• You can also shake the crates gently to listen for the sound of apples or oranges moving inside.

• Inspecting the labels on the crates may also provide clues as to their contents.

Secondary research involves analyzing existing data and information collected by others for a different purpose.

• Secondary research involves using sources such as books, articles, reports, and websites to gather information.

• It is cost-effective and time-saving compared to primary research.

• Examples include analyzing census data, market research reports, and academic studies.

• Secondary research helps in gaining insights, validating findings, and identifying trends in a particular...read more

Start to end approach for regression problem involves defining the problem, collecting data, preprocessing, modeling, and evaluating.

• Define the problem and set the goal

• Collect relevant data and preprocess it

• Choose a suitable regression model

• Train the model and evaluate its performance

• Fine-tune the model and repeat the process if necessary

AML stands for Anti-Money Laundering. Primary research involves collecting data firsthand, while secondary research involves analyzing existing data.

• AML is a set of procedures, laws, and regulations designed to prevent the illegal generation of income through money laundering.

• Primary research involves conducting surveys, interviews, and experiments to gather new data.

• Secondary research involves analyzing existing data sources such as reports, articles, and databases.

• Both type...read more

Statistics is the study of data. It helps us understand and interpret information by using mathematical methods.

• Statistics involves collecting, analyzing, and interpreting data.

• It helps us make decisions based on data and identify patterns and trends.

• Common statistical measures include mean, median, mode, and standard deviation.

• Statistics can be used in various fields such as business, healthcare, and social sciences.

• For example, statistics can help a business analyze sales d...read more

Research is the systematic investigation of a subject to discover new knowledge or validate existing theories.

• Research involves a systematic and organized approach to gather information and analyze data.

• It aims to answer specific questions or solve problems by using various methods and techniques.

• Research can be conducted in various fields such as science, social sciences, business, and technology.

• Examples of research include conducting surveys, experiments, interviews, and l...read more

Testing is the process of evaluating a system or component to identify defects or errors.

• Testing is an essential part of the software development life cycle.

• It involves executing a system or component with the intention of finding defects.

• Modules are independent units of software that can be tested individually.

• Test cases are specific inputs, conditions, and expected results used to validate the behavior of a system or component.

• Test cases are designed to cover different scen...read more

Types of research include qualitative, quantitative, experimental, and observational.

• Qualitative research focuses on understanding human behavior and motivations through methods like interviews and observations.

• Quantitative research involves collecting and analyzing numerical data to identify patterns and relationships.

• Experimental research involves manipulating variables to study cause-and-effect relationships.

• Observational research involves observing and recording behaviors...read more