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National Instruments Interview Questions and Answers
9 Interview questions
Discrete signals are defined at specific intervals, while digital signals represent discrete values using binary numbers.
Discrete signals can be time-based, like a sequence of samples from an analog signal.
Digital signals are a type of discrete signal that specifically uses binary values (0s and 1s).
An example of a discrete signal is a sampled audio waveform, while a digital signal could be a digital audio file li...
Floor value of square root of a number is the largest integer less than or equal to the square root.
The floor value of square root of a number can be found using mathematical functions like floor() or integer division.
For example, the floor value of square root of 16 is 4, as sqrt(16) = 4.
For non-perfect square numbers, the floor value of square root can be calculated using approximation methods.
Implement a function to find the floor square root of a given number without using sort() function.
Use binary search to find the square root of the number.
Start with a low value of 0 and high value of n.
Check the middle value and adjust the range accordingly.
Repeat until you find the floor square root.
To print a tree in anticlockwise direction, start from the bottom left and traverse each level from right to left.
Start from the bottom left of the tree
Traverse each level from right to left
Print the nodes as you traverse
Find the highest floor from where an egg won't break, given k floors and n eggs.
Use binary search to minimize the number of drops.
Start from the middle floor and drop the egg.
If it breaks, search in the lower half, else search in the upper half.
Repeat until the highest floor is found.
Object-oriented concepts involve creating classes and objects to organize and structure code.
Classes define the properties and behaviors of objects
Objects are instances of classes that can interact with each other
Inheritance allows for the creation of subclasses that inherit properties and behaviors from a parent class
Polymorphism allows for objects to take on multiple forms and behave differently depending on the...
OFDM is a digital modulation technique that divides a signal into multiple closely spaced sub-carriers, improving data transmission efficiency.
OFDM allows for high data rates by utilizing multiple sub-carriers simultaneously.
It is resistant to multipath fading, making it suitable for wireless communication.
OFDMA, a variant of OFDM, enables multiple users to share the same channel by allocating different sub-carrie...
Sampling is the process of selecting a subset of data from a larger population for analysis.
Sampling helps in making inferences about a population without examining every individual.
Types of sampling include random sampling, stratified sampling, and systematic sampling.
Example: In a survey of 1,000 people, selecting 100 randomly to represent the larger group.
The Central Limit Theorem states that the distribution o...
The question is about finding the minimum steps to reach from a source string to a destination string using three operations.
BFS and DFS are graph traversal techniques that can be used to solve this problem.
BFS is typically used when finding the shortest path or exploring all possible paths in a graph.
DFS is useful when searching for a specific path or exploring deeply into a graph.
In this case, BFS can be used to...
National Instruments Interview Experiences
14 interviews found
Anonymous
I appeared for an interview in Mar 2025, where I was asked the following questions.
- Q1. What is the difference between discrete signals and digital signals?
- Ans.
Discrete signals are defined at specific intervals, while digital signals represent discrete values using binary numbers.
Discrete signals can be time-based, like a sequence of samples from an analog signal.
Digital signals are a type of discrete signal that specifically uses binary values (0s and 1s).
An example of a discrete signal is a sampled audio waveform, while a digital signal could be a digital audio file like MP...
- Q2. What is sampling, and can you explain the derivation associated with it?
- Ans.
Sampling is the process of selecting a subset of data from a larger population for analysis.
Sampling helps in making inferences about a population without examining every individual.
Types of sampling include random sampling, stratified sampling, and systematic sampling.
Example: In a survey of 1,000 people, selecting 100 randomly to represent the larger group.
The Central Limit Theorem states that the distribution of sam...
- Q3. What is Orthogonal Frequency Division Multiplexing (OFDM) and what are the reasons for using Orthogonal Frequency Division Multiple Access (OFDMA)?
- Ans.
OFDM is a digital modulation technique that divides a signal into multiple closely spaced sub-carriers, improving data transmission efficiency.
OFDM allows for high data rates by utilizing multiple sub-carriers simultaneously.
It is resistant to multipath fading, making it suitable for wireless communication.
OFDMA, a variant of OFDM, enables multiple users to share the same channel by allocating different sub-carriers to...
Interview Preparation Tips
I applied via Naukri.com and was interviewed in May 2024. There were 2 interview rounds.
(2 Questions)
- Q1. About my current company
- Q2. About the work I do in my current company
Coding round where they ask few coding questions
arnav singh
Selected
I applied via Campus Placement and was interviewed in Jan 2024. There were 3 interview rounds.
1 hour basic leetcode questions
(1 Question)
- Q1. Discussion about resume and two coding questions which i had to solve on their coding platform
(2 Questions)
- Q1. Tell me about a time when you showed leadership qulities
- Q2. Take me through your resume
3 rounds online, dsa, hr
(2 Questions)
- Q1. Dsa on dp topic
- Q2. Dsa on dp topics
I applied via Campus Placement and was interviewed in Feb 2024. There were 3 interview rounds.
It was online coding test consist of 2 question
One from DP and other graph
One question of DP within in 45 min time constraints
(1 Question)
- Q1. Floor value of square root of a number
- Ans.
Floor value of square root of a number is the largest integer less than or equal to the square root.
The floor value of square root of a number can be found using mathematical functions like floor() or integer division.
For example, the floor value of square root of 16 is 4, as sqrt(16) = 4.
For non-perfect square numbers, the floor value of square root can be calculated using approximation methods.
Interview Preparation Tips
Software Development Engineer Intern Interview Questions & Answers
Saurabh Gupta
posted on 30 May 2024
I applied via Campus Placement and was interviewed in Apr 2024. There was 1 interview round.
(1 Question)
- Q1. Find floor square root of number n, without using sort() function. 1<=n<=10^12
- Ans.
Implement a function to find the floor square root of a given number without using sort() function.
Use binary search to find the square root of the number.
Start with a low value of 0 and high value of n.
Check the middle value and adjust the range accordingly.
Repeat until you find the floor square root.
Interview Preparation Tips
Skills evaluated in this interview
Aditi Kulkarni
2 coding questions, aptitude and electronics
I applied via Walk-in and was interviewed in Dec 2023. There was 1 interview round.
(1 Question)
- Q1. What is the conduction? Given a material asking how do we modify the structure to dissipate the heat faster?
Deepshikha
I applied via Campus Placement and was interviewed in Apr 2023. There were 2 interview rounds.
Level was medium to hard
(5 Questions)
- Q1. Technical interview
- Q2. Questions on DSA Cs fundamentals
- Q3. Coding questions
- Q4. Ques on String array
- Q5. To print tree in anticlock wise direction
- Ans.
To print a tree in anticlockwise direction, start from the bottom left and traverse each level from right to left.
Start from the bottom left of the tree
Traverse each level from right to left
Print the nodes as you traverse
Skills evaluated in this interview
Some old coding platform with limited testcases
(1 Question)
- Q1. Normal dp problems
(1 Question)
- Q1. About resume and projects
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