Product Perfect

The Bourne Shell was developed in the 1970s by Stephen Bourne at AT&T Bell Labs. It was originally written for the Unix operating system and has since been ported to other operating systems. The Bourne Shell is a command-line interpreter that allows users to control the operating system by entering commands. It is also a scripting language that can be used to automate tasks. The Bourne Shell is one of the most popular shell scripting languages in use today.

Ask the right questions secure the right Linux Shell Scripting language (.sh) talent among an increasingly shrinking pool of talent.

First 20 minutes

General Linux Shell Scripting language (.sh) app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in Linux Shell Scripting language (.sh) application development, including their experience with various programming languages, databases, and their approach to designing scalable and maintainable systems.

What is the purpose of a shebang in a shell script?

The shebang ('#!') at the start of a script indicates an interpreter for execution of the script. For example, '#!/bin/bash' specifies that the script should run with bash shell.

How would you make a shell script executable?

By using the chmod command. For instance, 'chmod +x script.sh' would make the script.sh file executable.

What are the different data types in shell scripting?

Shell scripting doesn't have data types. A variable can contain a number, a character, or a string of characters.

How would you read input during runtime in a shell script?

The 'read' command is used to get input from the user during runtime. For example, 'read varName' will prompt the user to input a value for varName.

What is the difference between a local and a global variable in shell scripting?

A local variable is only visible within the block of code where it's defined. A global variable, on the other hand, is visible to the entire script.

The hiring guide has been successfully sent to your email address.

Oops! Something went wrong while submitting the form.

What you’re looking for early on

Does the candidate have a strong understanding of Linux Shell Scripting language?

Has the candidate demonstrated problem-solving skills during the interview?

Is the candidate able to explain complex concepts in a simple way?

Does the candidate have experience with version control systems like Git?

Next 20 minutes

Specific Linux Shell Scripting language (.sh) development questions

The next 20 minutes of the interview should focus on the candidate's expertise with specific backend frameworks, their understanding of RESTful APIs, and their experience in handling data storage and retrieval efficiently.

How would you pass command line arguments to a shell script?

Command line arguments can be passed when executing the shell script. For example, './script.sh arg1 arg2'. Inside the script, these arguments can be accessed using the variables $1 for arg1, $2 for arg2, etc.

What is the difference between '$*' and '$@' in shell scripting?

Both are used to handle command line arguments. '$*' treats the entire set of positional parameters as a single string, while '$@' treats each positional parameter as a separate string.

How would you write a conditional statement in shell scripting?

Conditional statements in shell scripting are written using if, then, else, and fi keywords. For example: 'if [ condition ]; then commands; else commands; fi'.

What are the different loops in shell scripting and how do they work?

The different loops in shell scripting are for, while, and until. 'For' loops iterate over a list of items, 'while' loops iterate as long as a certain condition is true, and 'until' loops iterate as long as a certain condition is false.

How would you write a function in a shell script?

Functions in shell scripting are defined using the function keyword or directly using parentheses. For example, 'function myFunc { commands; }' or 'myFunc() { commands; }'.

The hiring guide has been successfully sent to your email address.

Oops! Something went wrong while submitting the form.

At this point, a skilled Linux Shell Scripting language (.sh) engineer should demonstrate strong problem-solving abilities, proficiency in Linux Shell Scripting language (.sh) programming language, and knowledge of software development methodologies. Red flags include lack of hands-on experience, inability to articulate complex concepts, or unfamiliarity with standard coding practices.

Digging deeper

Code questions

These will help you see the candidate's real-world development capabilities with Linux Shell Scripting language (.sh).

What does the following simple shell script do?
#!/bin/bash

echo 'Hello, World!'
This script prints the string 'Hello, World!' to the standard output.
What will be the output of the following shell script?
#!/bin/bash

for i in {1..5}
do
   echo "Number $i"
done
This script will print 'Number 1', 'Number 2', 'Number 3', 'Number 4', and 'Number 5' on separate lines.
What does the following shell script do?
#!/bin/bash

arr=( 'apple' 'banana' 'cherry' )

for i in "${arr[@]}"
do
   echo $i
done
This script creates an array of three elements and then iterates over the array, printing each element to the standard output.
What does the following shell script do?
#!/bin/bash

function async(){
   sleep 2
   echo 'async function'
}

async &

echo 'main script'
This script defines a function that sleeps for 2 seconds then prints 'async function'. It then calls this function asynchronously, and immediately prints 'main script'.

Wrap-up questions

Final candidate for Linux Shell Scripting language (.sh) Developer role questions

The final few questions should evaluate the candidate's teamwork, communication, and problem-solving skills. Additionally, assess their knowledge of microservices architecture, serverless computing, and how they handle Linux Shell Scripting language (.sh) application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

Describe the difference between a shell variable and an environment variable.

A shell variable is only available in the current shell. An environment variable is available to the current shell and all processes started from the current shell.

What is the purpose of the 'trap' command in shell scripting?

The 'trap' command is used to catch signals and execute specific commands when those signals are received. This can be used for cleanup tasks before a script exits.

How would you handle errors in a shell script?

Errors can be handled using conditional statements to check the success of commands using the '$?' variable, which contains the exit status of the last command. Another way is using the 'set -e' command to terminate the script if any command returns a non-true value.

Linux Shell Scripting language (.sh) application related

Product Perfect's Linux Shell Scripting language (.sh) development capabilities

Beyond hiring for your Linux Shell Scripting language (.sh) engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in Linux Shell Scripting language (.sh) projects, and can engage in multiple capacities.

Linux Shell Scripting language (.sh) Consultive assessments

Linux Shell Scripting language (.sh) Application Conversion Assessment Linux Shell Scripting language (.sh) Application Integration Assessment Linux Shell Scripting language (.sh) Data & Database Integration Assessment

Custom Linux Shell Scripting language (.sh) development projects

Custom Linux Shell Scripting language (.sh) App Conversion Linux Shell Scripting language (.sh) Custom App Development Process App UI Design for Linux Shell Scripting language (.sh) Facelifts

Hiring guide for Linux Shell Scripting language (.sh) Engineers

Linux Shell Scripting language (.sh) Developer Hiring Guide

What you’re looking for early on

The ideal back-end app developer

What you’re looking to see on the Linux Shell Scripting language (.sh) engineer at this point.

Linux Shell Scripting language (.sh) Consultive assessments

Custom Linux Shell Scripting language (.sh) development projects