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a. Which of these describes the behavior of wait ()? (1) Terminates the calling process (2) Blocks the calling process until one of its children terminates (3) Blocks until input from the terminal arrives (4) Blocks the calling process until all of its children have terminated b. It is best to use malloc() to allocate space for an array when (1) You want to avoid the possibility of buffer overflow (2) You don't know the needed size until runtime, and it may vary a lot A function needs to return a pointer to the array (3) (4) The array must be read-only c. Three methods of communication between parent and child processes are ... (1) signal(), pause (), and wait () (2) open (), dup2(), and 1seek () (3) Wi-Fi, cellular, and cable (4) pipes, signals, and environment variables

a. Which of these describes the behavior of wait ()? (1) Terminates the calling process (2) Blocks the calling process until one of its children terminates (3) Blocks until input from the terminal arrives (4) Blocks the calling process until all of its children have terminated b. It is best to use malloc() to allocate space for an array when (1) You want to avoid the possibility of buffer overflow (2) You don't know the needed size until runtime, and it may vary a lot A function needs to return a pointer to the array (3) (4) The array must be read-only c. Three methods of communication between parent and child processes are ... (1) signal(), pause (), and wait () (2) open (), dup2(), and 1seek () (3) Wi-Fi, cellular, and cable (4) pipes, signals, and environment variables

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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**a. Which of these describes the behavior of `wait()`?** 1. Terminates the calling process 2. Blocks the calling process until one of its children terminates 3. Blocks until input from the terminal arrives 4. Blocks the calling process until all of its children have terminated **b. It is best to use `malloc()` to allocate space for an array when** 1. You want to avoid the possibility of buffer overflow 2. You don’t know the needed size until runtime, and it may vary a lot 3. A function needs to return a pointer to the array 4. The array must be read-only **c. Three methods of communication between parent and child processes are…** 1. `signal()`, `pause()`, and `wait()` 2. `open()`, `dup2()`, and `lseek()` 3. Wi-Fi, cellular, and cable 4. pipes, signals, and environment variables **d. If a process forks and the parent terminates before the child,** 1. the child is forcibly terminated by the OS 2. the OS delivers `SIGPARENT` to the child 3. the “init” process (#1) adopts the child and is made its parent 4. the child is put in a kernel data structure called the “orphanage”
Transcribed Image Text:**a. Which of these describes the behavior of `wait()`?** 1. Terminates the calling process 2. Blocks the calling process until one of its children terminates 3. Blocks until input from the terminal arrives 4. Blocks the calling process until all of its children have terminated **b. It is best to use `malloc()` to allocate space for an array when** 1. You want to avoid the possibility of buffer overflow 2. You don’t know the needed size until runtime, and it may vary a lot 3. A function needs to return a pointer to the array 4. The array must be read-only **c. Three methods of communication between parent and child processes are…** 1. `signal()`, `pause()`, and `wait()` 2. `open()`, `dup2()`, and `lseek()` 3. Wi-Fi, cellular, and cable 4. pipes, signals, and environment variables **d. If a process forks and the parent terminates before the child,** 1. the child is forcibly terminated by the OS 2. the OS delivers `SIGPARENT` to the child 3. the “init” process (#1) adopts the child and is made its parent 4. the child is put in a kernel data structure called the “orphanage”
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