Detecting Memory Leaks CTAL-TTA Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which of the following is a best practice to prevent memory leaks in a language with manual memory management, such as C or C++?

   • AAlways pair every allocation with a corresponding deallocation, using RAII or smart pointers to automate resource release.
   • BAvoid using the heap entirely and allocate all memory on the stack.
   • CRely on the operating system to reclaim memory when the program exits, so no explicit deallocation is needed.
   • DUse global variables to store all allocated pointers so they can be freed at program exit.
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2. 12foundation · easy

   What is the primary purpose of heap profiling in dynamic analysis for memory leak detection?

   • ATo measure the CPU time spent in garbage collection to optimize performance.
   • BTo replace the standard memory allocator with a custom one that prevents leaks.
   • CTo analyze the source code without executing it to find potential memory leaks.
   • DTo track memory allocations and deallocations at runtime, allowing identification of memory that is allocated but never freed.
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4. 13application · medium

   A team is using a static analysis tool to scan a C# codebase. The tool reports a potential memory leak where an event handler is attached to a static event but never removed. Why is this a concern?

   • AThe event handler keeps the subscriber object alive indefinitely
   • BThe event handler will be called multiple times unexpectedly
   • CThe event handler will cause a compile-time error
   • DThe event handler will slow down the event dispatch
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5. 14application · medium

   A heap dump analysis of a Java application shows that a large number of java.util.HashMap$Node objects are retained. The dominator tree indicates they are all reachable from a single static field named CACHE in the class DataStore. What is the most likely source of the memory leak?

   • AThe application is using too many threads
   • BThe static CACHE map is never cleared or evicted
   • CThe HashMap class itself has a bug
   • DThe garbage collector is not running
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6. 15application · medium

   A team is developing a long-running service that frequently creates temporary objects. To prevent memory leaks, which coding practice is most effective?

   • AAvoid using any collections in the code
   • BIncrease the heap size to accommodate more objects
   • CUse weak references for caches and clear collections when no longer needed
   • DRely on the garbage collector to handle all objects
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