Which of the following is not a valid C variable name?
TechZoom24-BugBash_Prelims

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Computers
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University
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Hard
PANCHAMI (RA2332241010031)
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25 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
float rate;
int variable_count;
int $main;
int number;
Answer explanation
The variable name int $main; is not valid in C because it contains a special character ($). Variable names in C cannot start with special characters.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statements best explains why C is not considered a platform-independent programming language?
C does not have a standard specification.
C programs cannot be compiled on different operating systems.
C code is not capable of running on embedded systems.
C code may rely on platform-specific features and behaviors.
Answer explanation
C code may rely on platform-specific features and behaviors, making it not considered a platform-independent programming language.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is #include ?
Preprocessor directive
Inclusion directive
File inclusion directive
None of the mentioned
Answer explanation
The correct choice is 'Preprocessor directive' because #include is used in C/C++ to include the contents of another file during compilation.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is meant by 'a' in the following C operation? fp = fopen("Random.txt", "a");
Attach
Append
Apprehend
Add
Answer explanation
The 'a' in the fopen() function stands for 'Append', which means the file will be opened for writing at the end of the file, preserving the existing content.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What will be the output of the following C code?
Compile time error
Hello World! 34
Hello World! 1000
Hello World! followed by a junk value
Answer explanation
The correct answer is 'Compile time error' because the code is missing the 'main' function which is required in C programs.
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What are mandatory parts in the function declaration in c?
return type, function name
return type, function name, parameters
parameters, function name
parameters, variables
Answer explanation
The mandatory parts in a function declaration in C are the return type and the function name.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is more effective while calling the functions?
call by value
call by reference
call by pointer
call by object
Answer explanation
Call by reference is more effective while calling functions as it allows the function to directly access and modify the original data without making a copy.
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