Embedded Systems Online Test

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About the test

The Embedded Systems online test assesses candidates' knowledge of hardware used for embedded systems together with software needed to run it.

It's an ideal test for pre-employment screening. A good embedded systems/software engineer needs to know how to design, develop, test, and maintain embedded systems. They need to be familiar with hardware used for embedded systems, technologies used for connecting embedded devices and know how to develop software required to run the system.

This online test requires candidates to answer multiple-choice and fill the blanks questions about hardware used in embedded devices, network protocols, and software used in embedded applications.

Sample public questions

Easy
10 min
fill
Public
AI-resistant
Embedded Systems
Boolean Function
Logic Gates

You have a component which should be used as part of a signal processing device. It has four input pins, one output pin, and three slots where you can insert logical gates:

A diagram showing the logic gates and their connections

The component should have the following truth table:

In Out
A B C D E
0 0 0 0 0
0 0 0 1 0
0 0 1 0 0
0 0 1 1 0
0 1 0 0 0
0 1 0 1 1
0 1 1 0 1
0 1 1 1 0
1 0 0 0 0
1 0 0 1 1
1 0 1 0 1
1 0 1 1 0
1 1 0 0 0
1 1 0 1 0
1 1 1 0 0
1 1 1 1 0

Choose appropriate logic gates for the component's slots to achieve the required truth table.

1st slot: __ gate

2nd slot: __ gate

3rd slot: __ gate

Hard
5 min
mca
Public
AI-resistant
Embedded Systems
Critical Section
Mutex
Semaphore

The following part of the C code distributes packets from the input track to the output track:

void* take_and_put(void *arg)
{
    sem_wait(&semaphore);
    take();
    sem_post(&semaphore);

    pthread_mutex_lock(&mutex);
    put();
    pthread_mutex_unlock(&mutex);

    return NULL;
}

Where semaphore and mutex are initialized with:

// int sem_init(sem_t *sem, int pshared, unsigned int value);
sem_init(&semaphore, 0, 3);
// int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr);
pthread_mutex_init(&mutex, NULL);

If the function take_and_put is repeatedly called by a large number of threads, select correct statements about the take_and_put function.

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5 more premium Embedded Systems questions

Storing Data, Smart Home, Water Level Sensor, USB, Peripheral Device.

Skills and topics tested

  • Embedded Systems
  • Endianness
  • Number System Conversion
  • IoT
  • Wireless Connection
  • Memory Management
  • Stack Memory Allocation
  • Computer Bus
  • Wired Connection
  • Boolean Function
  • Logic Gates

For job roles

  • Embedded Software Engineer
  • Embedded Systems Engineer

Sample candidate report

What others say

Decorative quote

Simple, straight-forward technical testing

TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

Jan Opperman, Grindrod Bank

Product reviews

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