Tata Elixsi Interview Experience

-

1. Tell me about yourself
2. Questions about project
3. Write a C program to check whether a particular character exists in
a string?also testcases to be written
4. Write a code to check the endianess of the microcontroller
5. Write a macro to find the square of a number
6. What is ISR and how interrupt latency is reduced

Comments

Post a Comment

Popular posts from this blog

Connecting Serial ports of two Ubuntu VMWare Virtual Machines

-
Image
This post is to establish the serial communication between two Virtual Machines running Ubuntu in VMWare. Serial Ports are very important and with this setup, we can write applications and don't worry to have a hardware. This setup is also used if we need to setup KGDB Steps on the First Virtual Machine: Step1: Open Virtual Machine Settings and click on Add Step2:  Select "Serial Port" and Click On Next Step3: Select "Use Named Pipe" Step4: You will observe the named pipe of the form \\.\pipe\<namedpipe>. Keep the settings as it is i..e, the named pipe: \\.\pipe\com_1 ( it will be ttyS1 in Linux) and click on Finish Steps on the Second Virtual Machine: Perform the same steps  1 to 4 except in 4th step select "This end is Client". Testing the serial connection between VMs: 1. Power on the two VMs 2. On First VM : cat /dev/ttyS1 and the other VM: echo "hello" > /dev/ttyS1
Read more

Linux Commands for Hardware Info - lshw, lspci, lsdev, lscpu, lsblk, lsusb

-
Image
In this post, we will discuss some of the Linux commands for retrieving hardware information. I am using Ubuntu 14.04 as my development machine. 1. lshw  -> lshw stands for list hardware. It generates detailed information about various hardware devices present on the system by reading the /proc filesystem. Running lshw without any commands will generate full information report about all detected hardware. Note: It should run as root user to get full information Running "lshw -short" will produce brief information For more lshw commands, look at this article:  https://www.binarytides.com/linux-lshw-command/ 2. lspci  -> Displays information about the PCI buses in the system and devices connected to them. Simply run the lspci command to get the PCI information. Running "lspci -vvv" command will generate verbose output, which also contains the name of the driver for that PCI Device. Running "lspci -tree" will di...
Read more

bb.utils.contains yocto

-
Image
bb.utils.contains  is most commonly used function in Yocto. grep in poky directory returned with 696 count. $ grep -nr 'bb.utils.contains' poky/ | wc -l 696 It's definition is present in 'poky/bitbake/lib/bb/utils.py' file This function returns third argument if the second argument is subset of the first argument else returns fourth argument Let's take an example to understand this. You can see from the above screenshot, when the second argument is a subset of first argument, "present" was returned, else "notpresent" was returned We can also use bb.utils.contains inside if loop. This we can use inside a recipe. if ${@bb.utils.contains('SOMEFLAG','NEWVALUE3','true','false',d)}; then     FOO = 'HELLO' fi
Read more