Logic & Programming GFACT Practice Questions (Page 2)

Questions 6–10

1. 6application · easy

   A script processes a list of IP addresses. It should print each IP that is not in the blocklist. The code is: for ip in ip_list: if ip in blocklist: continue; print(ip). What is the effect of the continue statement?

   • AIt skips the rest of the loop body for the current IP and moves to the next IP
   • BIt exits the loop entirely
   • CIt causes a syntax error
   • DIt prints the IP and then continues
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2. 7expert · medium

   A developer is debugging a C program that crashes with a segmentation fault. The program uses a pointer to an integer and assigns a value to it. The code is: `int *ptr; *ptr = 10;`. What is the most likely cause of the crash?

   • AThe program uses `malloc()` but does not check if it returns NULL.
   • BThe program does not include `<stdio.h>`.
   • CThe pointer is initialized to NULL, and assigning a value to NULL causes a crash.
   • DThe pointer is not initialized, so it points to an invalid memory address.
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4. 8foundation · easy

   In C, what is the primary purpose of the malloc function?

   • ATo resize a previously allocated memory block
   • BTo allocate a block of memory of a specified size on the heap
   • CTo allocate memory and initialize all bytes to zero
   • DTo release previously allocated memory
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5. 9foundation · easy

   What is the typical order of execution in a program that uses a loop and a function?

   • AStatements execute sequentially from top to bottom, except when control structures alter the flow.
   • BLoops execute before any function definitions.
   • CAll functions execute before any other statements.
   • DExecution starts at the last line of the file.
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6. 10application · medium

   A C developer is writing a program that needs to allocate memory for a dynamic array of strings. The developer uses `malloc()` to allocate memory for the array, but later the program crashes when trying to access an element. What is the most likely cause?

   • AThe developer did not allocate memory for each string in the array.
   • BThe developer forgot to include `<string.h>`.
   • CThe developer used `malloc()` instead of `calloc()`, so the memory is not initialized.
   • DThe developer used `free()` on the array before accessing it.
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