C Language (Intermediate) Test

This is an application-oriented test that assesses the knowledge of core concepts of C & Data Structures at an intermediate level and evaluates the ability of a candidate to develop complex applications independently.

Available in

  • English

Summarize this test and see how it helps assess top talent with:

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12 Skills measured

  • C Language (Intermediate)
  • Memory Management (Intermediate)
  • Pointers & Arrays (Intermediate)
  • Strings & String Handling
  • Control Flow & Looping (Intermediate)
  • Functions & Parameter Passing
  • Structures & Basic Data Modeling
  • File Handling (Intermediate)
  • Preprocessor Basics
  • Debugging & Error Reasoning (Intermediate)
  • Defensive Programming Practices
  • C Language Fundamentals (Consolidation)

Test Type

Coding Test

Duration

18 mins

Level

Intermediate

Questions

12

Use of C Language (Intermediate) Test

This is an application-oriented test that assesses the knowledge of core concepts of C & Data Structures at an intermediate level and evaluates the ability of a candidate to develop complex applications independently. C is one of the fastest procedural programming languages used in operating systems and various application software for different computer architectures and embedded systems. A C Developer is responsible for developing code that integrates into the operating systems, modules, embedded systems, or low-level libraries for other high-level languages such as Node.js, Python, and Go.

A C programmer should effectively use the various C Programming elements and concepts, such as functions, loops, pointers, and arrays, to solve real-world problems.

Skills measured

Assess the ability to correctly allocate, use, and free memory in typical application-level C programs, and identify common memory misuse issues.

What this skill SHOULD cover

  • malloc, calloc, free
  • Correct size calculation
  • Initialization vs uninitialized memory
  • Ownership and responsibility for freeing memory
  • Simple memory leaks and dangling pointers
  • Correct use of NULL

What this skill SHOULD NOT cover

  • Custom allocators
  • Deep heap internals
  • Complex reallocation logic
  • Tool-driven memory debugging

Assess ability to correctly use pointers and arrays together, and reason about memory access.

What this skill SHOULD cover

  • Pointer declaration and initialization
  • Pointers with arrays and strings
  • Pointer arithmetic (basic, safe cases)
  • Passing pointers to functions
  • Common pointer mistakes (off-by-one, wrong dereference)

What this skill SHOULD NOT cover

  • Function pointers
  • Pointer-to-pointer complexity beyond basics
  • Obscure pointer tricks

Assess safe and correct string manipulation and awareness of common pitfalls.

What this skill SHOULD cover

  • Strings as character arrays
  • Standard string functions (strlen, strcpy, strcmp, strcat)
  • Correct buffer sizing
  • String input/output
  • Common string bugs

What this skill SHOULD NOT cover

  • Custom string libraries
  • Advanced buffer overflow exploitation
  • Wide characters or locale handling

Assess ability to write and reason about non-trivial control flow.

What this skill SHOULD cover

  • Nested if / else
  • switch usage (including fall-through awareness)
  • for, while, do-while
  • Loop termination conditions
  • Infinite loop bugs

What this skill SHOULD NOT cover

  • Extremely complex nesting
  • Performance-oriented loop optimization

Assess ability to design and use functions correctly, including understanding how data is passed.

What this skill SHOULD cover

  • Function declaration and definition
  • Return values
  • Pass-by-value vs pass-by-reference
  • Passing arrays and pointers
  • Common function-related bugs

What this skill SHOULD NOT cover

  • Recursion-heavy problems
  • Function pointers
  • Variadic functions

Assess ability to model data using structures and use them correctly.

What this skill SHOULD cover

  • Defining and using struct
  • Accessing structure members
  • Passing structures to functions
  • Arrays of structures
  • Common struct misuse issues

What this skill SHOULD NOT cover

  • Unions in depth
  • Alignment and padding analysis
  • Bit-fields

Assess ability to perform basic file operations safely and correctly.

What this skill SHOULD cover

  • Opening and closing files
  • Text file I/O
  • Basic error handling
  • File modes
  • Resource cleanup

What this skill SHOULD NOT cover

  • Binary file complexity
  • File positioning edge cases
  • OS-specific I/O behavior

Assess correct and disciplined usage of the C preprocessor.

What this skill SHOULD cover

  • #include
  • #define constants
  • Simple macros
  • Header file usage

What this skill SHOULD NOT cover

  • Complex macros
  • Conditional compilation logic
  • Macro metaprogramming

Assess ability to identify and reason about bugs in C code without relying on advanced tools.

What this skill SHOULD cover

  • Compile-time vs runtime errors
  • Logical bugs
  • Reading compiler warnings
  • Understanding incorrect output or crashes

What this skill SHOULD NOT cover

  • Tool-specific debugging commands
  • Advanced profiling or sanitizers

Assess awareness of safe coding practices and avoidance of common errors.

What this skill SHOULD cover

  • Input validation
  • Boundary checks
  • Safe usage of standard library functions
  • Avoiding undefined behavior

What this skill SHOULD NOT cover

  • Security exploitation techniques
  • Advanced secure coding frameworks

Assess holistic understanding of core C concepts working together.

What this skill SHOULD cover

  • Interactions between variables, pointers, arrays, and functions
  • Reading and understanding medium-sized code snippets
  • Identifying subtle but common errors

What this skill SHOULD NOT cover

  • System-level programming
  • Advanced optimization strategies

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Recruiter efficiency

6x

Recruiter efficiency

Decrease in time to hire

55%

Decrease in time to hire

Candidate satisfaction

94%

Candidate satisfaction

Subject Matter Expert Test

The C Language (Intermediate) Subject Matter Expert

Testlify’s skill tests are designed by experienced SMEs (subject matter experts). We evaluate these experts based on specific metrics such as expertise, capability, and their market reputation. Prior to being published, each skill test is peer-reviewed by other experts and then calibrated based on insights derived from a significant number of test-takers who are well-versed in that skill area. Our inherent feedback systems and built-in algorithms enable our SMEs to refine our tests continually.

Why choose Testlify

Elevate your recruitment process with Testlify, the finest talent assessment tool. With a diverse test library boasting 3000+ tests, and features such as custom questions, typing test, live coding challenges, Google Suite questions, and psychometric tests, finding the perfect candidate is effortless. Enjoy seamless ATS integrations, white-label features, and multilingual support, all in one platform. Simplify candidate skill evaluation and make informed hiring decisions with Testlify.

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Frequently asked questions (FAQs) for C Language (Intermediate) Test

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A C language (Intermediate) assessment is a test of a person's knowledge and skills in the C programming language at an intermediate level. This typically involves assessing the individual's understanding of intermediate-level concepts in C, such as pointers, arrays, structures, and file input/output, as well as their ability to write, debug, and optimize C code.

A C language (Intermediate) assessment is a tool that recruiters and hiring managers can use to evaluate candidates' ability to write high-quality code and handle datatypes and file handling. It helps them to determine if a candidate has the necessary skills to perform intermediate-level tasks in C programming.

C Programmer C Developer C Software Engineer Embedded C Developer Software Engineer

Structures Pointers File Handling Functions Handling Datatypes Looping and Conditional statements What are the responsibilities of a C Programmer

Improving the performance and efficiency of C code.

Writing new code for projects or applications, as well as maintaining and updating existing code.

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