The ____ function locates the first occurrence of the character in the string.
A. strtok()
B. strchr()
C. strnchr()
D. strncmp()
Answer: B
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Which statement about vacuum tubes is NOT accurate?
A) They are similar to light bulbs. B) They seldom need to be replaced. C) They generate a lot of heat when operating. D) They were used in first-generation computers.
What is the right code for the boolean empty() method?
A queue based on a linked list uses the following code ``` class Node { String element; Node next; Node (String el, Node n) { element = el; next = n; } } Node front = null, rear = null; ``` A) return front == null; B) if (rear == front) return true; else return false; C) if (front == null) throw new RuntimeException("Empty"); else return false; return true; D) return front == rear;