Podcast
Questions and Answers
What is the output of the following code: if (x > 5) {puts("Greater than 5");} else {puts("Less than or equal to 5");} if x is 3?
What is the output of the following code: if (x > 5) {puts("Greater than 5");} else {puts("Less than or equal to 5");} if x is 3?
What is the output of the following code: puts(x > 5? "Greater than 5" : "Less than or equal to 5"); if x is 8?
What is the output of the following code: puts(x > 5? "Greater than 5" : "Less than or equal to 5"); if x is 8?
What is the output of the following code: if (y == 0) {puts("Zero");} else {puts("Non-zero");} if y is 0?
What is the output of the following code: if (y == 0) {puts("Zero");} else {puts("Non-zero");} if y is 0?
What is the output of the following code: puts(y == 0? "Zero" : "Non-zero"); if y is 4?
What is the output of the following code: puts(y == 0? "Zero" : "Non-zero"); if y is 4?
Signup and view all the answers
What is the output of the following code: if (z > 10) {puts("Greater than 10");} else {puts("Less than or equal to 10");} if z is 12?
What is the output of the following code: if (z > 10) {puts("Greater than 10");} else {puts("Less than or equal to 10");} if z is 12?
Signup and view all the answers
What is the output of the following code: puts(z > 10? "Greater than 10" : "Less than or equal to 10"); if z is 8?
What is the output of the following code: puts(z > 10? "Greater than 10" : "Less than or equal to 10"); if z is 8?
Signup and view all the answers
What is the output of the following code: if (x == 5) {puts("Five");} else {puts("Not Five");} if x is 5?
What is the output of the following code: if (x == 5) {puts("Five");} else {puts("Not Five");} if x is 5?
Signup and view all the answers
What is the output of the following code: puts(x == 5? "Five" : "Not Five"); if x is 3?
What is the output of the following code: puts(x == 5? "Five" : "Not Five"); if x is 3?
Signup and view all the answers
What is the primary security risk of directly inserting user input into a format string?
What is the primary security risk of directly inserting user input into a format string?
Signup and view all the answers
What is the purpose of the free() function in memory management?
What is the purpose of the free() function in memory management?
Signup and view all the answers
What is the term for a pointer that points to memory that has already been freed?
What is the term for a pointer that points to memory that has already been freed?
Signup and view all the answers
What is the main advantage of using printf() statements for debugging?
What is the main advantage of using printf() statements for debugging?
Signup and view all the answers
Which debugging tool is specifically designed to detect memory leaks and errors?
Which debugging tool is specifically designed to detect memory leaks and errors?
Signup and view all the answers
What is the purpose of calloc() in memory management?
What is the purpose of calloc() in memory management?
Signup and view all the answers
What is the primary consequence of forgetting to free() allocated memory?
What is the primary consequence of forgetting to free() allocated memory?
Signup and view all the answers
What is the term for unreleased memory that is no longer needed?
What is the term for unreleased memory that is no longer needed?
Signup and view all the answers
What is the primary benefit of performing a code review?
What is the primary benefit of performing a code review?
Signup and view all the answers
What is the primary purpose of using gdb for debugging?
What is the primary purpose of using gdb for debugging?
Signup and view all the answers
Study Notes
Output of Code Snippets
- When
xis 3 in the first code block, the output is "Less than or equal to 5". - When
xis 8 in the second code block, the output is "Greater than 5". - When
yis 0 in the third code block, the output is "Zero". - When
yis 4 in the fourth code block, the output is "Non-zero". - When
zis 12 in the fifth code block, the output is "Greater than 10". - When
zis 8 in the sixth code block, the output is "Less than or equal to 10". - When
xis 5 in the seventh code block, the output is "Five". - When
xis 3 in the eighth code block, the output is "Not Five".
Security Risks in Code
- Directly inserting user input into a format string can lead to format string vulnerabilities, allowing attackers to execute arbitrary code or read memory.
Memory Management Functions
- The
free()function is used to deallocate memory that was previously allocated, preventing memory leaks. - A pointer that references freed memory is known as a "dangling pointer".
-
calloc()allocates memory for an array and initializes all bytes to zero, providing a safer initialization option compared tomalloc().
Debugging Concepts
- Using
printf()statements for debugging allows developers to track variable values at different execution stages, making it easier to pinpoint errors. - Tools like Valgrind are specifically designed to detect memory leaks and errors during program execution.
Consequences of Memory Mismanagement
- Forgetting to
free()allocated memory can lead to memory leaks, which consume system resources and potentially degrade performance. - Unreleased memory that is no longer needed is termed as "memory leak".
Benefits of Code Review
- The primary benefit of performing a code review is to identify bugs and improve code quality by leveraging collective knowledge and different perspectives.
Debugging Tool Purpose
- The primary purpose of using
gdb(GNU Debugger) is to allow developers to examine and control the execution of their program, enabling step-by-step debugging to isolate issues.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Learn about the conditional operator in C programming, a ternary operator that takes three operands to form a conditional expression. Understand how it works and how it's related to the if...else statement. Test your knowledge with this quiz!
