Unix Interview Questions and Answers in 2025 (100+ Q&A)

Awk

Ques:- What is the use of string function split(string,array,separator)in AWK?

Asked In :-

Right Answer:
The `split(string, array, separator)` function in AWK is used to divide a string into substrings based on a specified separator and store those substrings in an array.

Awk

Ques:- What is the use of string function substr(string,position) in AWK?

Asked In :-

Right Answer:
The `substr(string, position)` function in AWK is used to extract a substring from a given string, starting at the specified position. The position is 1-based, meaning that the first character of the string is at position 1.

Awk

Ques:- What is the use of string function substr(string,position,max) in AWK?

Asked In :-

Right Answer:
The `substr(string, position, max)` function in AWK is used to extract a substring from a given string, starting at the specified position and up to a maximum length of characters.

Awk

Ques:- What is the use of string function index(string,search) in AWK?

Asked In :-

Right Answer:
The `index(string, search)` function in AWK returns the position of the first occurrence of the substring `search` within the string `string`. If `search` is not found, it returns 0.

Awk

Ques:- What are Trigonometric Functions in AWK?

Asked In :-

Right Answer:
In AWK, trigonometric functions include `sin(x)`, `cos(x)`, and `atan2(y, x)`, which calculate the sine, cosine, and arctangent of given angles in radians, respectively.

Awk

Ques:- How to Truncate Integers in AWK?

Asked In :-

Right Answer:
You can truncate integers in AWK by using the `int()` function. For example:

```awk
result = int(value)
```

Awk

Ques:- How to generate random numbers in AWK?

Asked In :-

Right Answer:
You can generate random numbers in AWK using the `rand()` function. For example:

```awk
awk 'BEGIN { print rand() }'
```

This will print a random number between 0 and 1. To generate a random integer within a specific range, you can use:

```awk
awk 'BEGIN { print int(rand() * (max - min + 1)) + min }'
```

Replace `min` and `max` with your desired range.

Awk

Ques:- What is the use of numeric function rand ?

Asked In :-

Right Answer:
The `rand` function in AWK generates a random floating-point number between 0 and 1.

Comments

Admin May 17, 2020

Random

Awk

Ques:- What is the use of numeric function srand ?

Asked In :-

Right Answer:
The `srand` function in AWK is used to seed the random number generator, allowing for the generation of different random numbers each time the program runs.

Comments

Admin May 17, 2020

Seed Random

Awk

Ques:- What is the use of numeric function sin ?

Asked In :-

Right Answer:
The numeric function `sin` in AWK calculates the sine of a given angle (in radians).

Comments

Admin May 17, 2020

Sine

Awk

Ques:- What is the use of numeric function sqrt ?

Asked In :-

Right Answer:
The numeric function `sqrt` is used to calculate the square root of a given number.

Comments

Admin May 17, 2020

Square Root

Awk

Ques:- What is the use of numeric function atan2?

Asked In :-

Right Answer:
The numeric function `atan2` computes the arctangent of the quotient of its two arguments, returning the angle in radians between the positive x-axis and the point (x, y) in a Cartesian coordinate system. It is useful for determining the angle of a point relative to the origin.

Comments

Admin May 17, 2020

Arctangent

Awk

Ques:- What is the use of numeric function int ?

Asked In :-

Right Answer:
The numeric function `int` in AWK is used to convert a value to an integer by truncating any decimal part.

Comments

Admin May 17, 2020

Integer

Awk

Ques:- What is the use of numeric function log ?

Asked In :-

Right Answer:
The numeric function `log` in AWK is used to calculate the natural logarithm (base e) of a given number.

Comments

Admin May 17, 2020

Logarithm

Awk

Ques:- How to exit from an awk script using the exit command?

Asked In :-

Right Answer:
You can exit from an awk script using the `exit` command followed by an optional exit status. For example:

```awk
awk '{ if ($1 == "exit") exit 0 }'
```

This will terminate the script when the first field is "exit".

Awk

Ques:- What are AWK Numerical Functions?

Asked In :-

Right Answer:
AWK numerical functions include:

1. `sin(x)` - Returns the sine of x (in radians).
2. `cos(x)` - Returns the cosine of x (in radians).
3. `atan2(y, x)` - Returns the arctangent of y/x.
4. `sqrt(x)` - Returns the square root of x.
5. `int(x)` - Returns the integer part of x.
6. `length(x)` - Returns the length of string x.
7. `rand()` - Returns a random number between 0 and 1.
8. `exp(x)` - Returns e raised to the power of x.
9. `log(x)` - Returns the natural logarithm of x.
10. `sprintf(format, ...)` - Formats and returns a string based on the specified format.

Awk

Ques:- What is the use of numeric function cos ?

Asked In :-

Right Answer:
The numeric function `cos` in AWK is used to calculate the cosine of an angle given in radians.

Comments

Admin May 17, 2020

cosine

Awk

Ques:- What is the use of numeric function exp ?

Asked In :-

Right Answer:
The numeric function `exp` in AWK is used to calculate the value of e (Euler's number, approximately 2.71828) raised to the power of a given number.

Comments

Admin May 17, 2020

Exponent

Awk

Ques:- How do you Explicit File output?

Asked In :-

Right Answer:
To explicitly output to a file in AWK, use the `>` operator followed by the filename in the `BEGIN` block. For example:

```awk
awk 'BEGIN { print "Hello, World!" > "output.txt" }'
```

Awk

Ques:- What is the use of sequence a?

Asked In :-

Right Answer:
In AWK, the sequence `a` is used to represent an associative array, where `a` can store key-value pairs.

Comments

Admin May 17, 2020

ASCII bell

The Unix category on takluu.com is designed for IT professionals and developers preparing for interviews that require a strong understanding of Unix operating systems. Unix has been the backbone of many enterprise systems due to its stability, security, and multitasking capabilities.

This section covers key topics such as Unix file system architecture, shell scripting, process management, file permissions, user management, and networking commands. You will also learn about vi editor, cron jobs, package management, and system monitoring tools.

Interview questions often assess your proficiency in writing shell scripts, automating tasks, troubleshooting system issues, and managing user permissions. Candidates may be tested on commands like grep, awk, sed, find, and piping techniques, as well as understanding system boot processes and kernel basics.

Roles such as Unix Administrator, DevOps Engineer, System Engineer, and Backend Developer often require expertise in Unix environments. This category also includes best practices for security hardening, backup strategies, and performance tuning in Unix systems.

At Takluu, we offer detailed tutorials, practical exercises, and interview question sets that will help you build confidence and excel in your Unix-related interviews.

Whether you’re a beginner or looking to deepen your Unix skills, this category equips you with comprehensive knowledge to manage Unix systems efficiently and advance your career.

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